diff --git a/docs/backups/docker-installs/docker-installs.md b/docs/backups/docker-installs/docker-installs.md deleted file mode 100644 index cc211cee5e0..00000000000 --- a/docs/backups/docker-installs/docker-installs.md +++ /dev/null @@ -1,6 +0,0 @@ ---- -title: Backup and Restore for Rancher Installed with Docker ---- - -- [Backups](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/back-up-docker-installed-rancher.md) -- [Restores](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-docker-installed-rancher.md) \ No newline at end of file diff --git a/docs/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md b/docs/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md index bc5cc83d471..300e152bb22 100644 --- a/docs/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md +++ b/docs/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md @@ -109,20 +109,23 @@ This reference contains variables that you can use in `questions.yml` nested und | label | string | true | Define the UI label. | | description | string | false | Specify the description of the variable.| | type | string | false | Default to `string` if not specified (current supported types are string, multiline, boolean, int, enum, password, storageclass, hostname, pvc, and secret).| -| required | bool | false | Define if the variable is required or not (true \| false)| | default | string | false | Specify the default value. Only used if there is no corresponding value in the `values.yml` file. | | group | string | false | Group questions by input value. | -| min_length | int | false | Min character length.| -| max_length | int | false | Max character length.| -| min | int | false | Min integer length. | -| max | int | false | Max integer length. | | options | []string | false | Specify the options when the variable type is `enum`, for example: options:
- "ClusterIP"
- "NodePort"
- "LoadBalancer"| -| valid_chars | string | false | Regular expression for input chars validation. | -| invalid_chars | string | false | Regular expression for invalid input chars validation.| | subquestions | []subquestion | false| Add an array of subquestions.| | show_if | string | false | Show current variable if conditional variable is true. For example `show_if: "serviceType=Nodeport"` | | show\_subquestion_if | string | false | Show subquestions if is true or equal to one of the options. for example `show_subquestion_if: "true"`| + + :::note `subquestions[]` cannot contain `subquestions` or `show_subquestions_if` keys, but all other keys in the above table are supported. diff --git a/docs/how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/set-up-clusters-from-hosted-kubernetes-providers/aks.md b/docs/how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/set-up-clusters-from-hosted-kubernetes-providers/aks.md index b65d7aa9b4b..f176acc177b 100644 --- a/docs/how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/set-up-clusters-from-hosted-kubernetes-providers/aks.md +++ b/docs/how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/set-up-clusters-from-hosted-kubernetes-providers/aks.md @@ -8,7 +8,6 @@ title: Creating an AKS Cluster You can use Rancher to create a cluster hosted in Microsoft Azure Kubernetes Service (AKS). - ## Prerequisites in Microsoft Azure :::caution @@ -65,6 +64,14 @@ az ad sp create-for-rbac \ --role Contributor ``` +### Setting Up the Service Principal with the Azure Command Line Tool + +Create the Resource Group by running this command: + +``` +az group create --location AZURE_LOCATION_NAME --resource-group AZURE_RESOURCE_GROUP_NAME +``` + ### Setting Up the Service Principal from the Azure Portal You can also follow these instructions to set up a service principal and give it role-based access from the Azure Portal. @@ -124,6 +131,17 @@ When provisioning an AKS cluster in the Rancher UI, RBAC is not configurable bec RBAC is required for AKS clusters that are registered or imported into Rancher. +### Setting Up the Role Assignment to Service Principal with the Azure Command Line Tool + +Assign the Rancher AKSv2 role to the service principal with the Azure Command Line Tool: + +``` +az role assignment create \ +--assignee CLIENT_ID \ +--scope "/subscriptions/SUBSCRIPTION_ID/resourceGroups/RESOURCE_GROUP_NAME" \ +--role "Rancher AKSv2" +``` + ## AKS Cluster Configuration Reference For more information about how to configure AKS clusters from the Rancher UI, see the [configuration reference.](../../../../reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md) @@ -146,12 +164,114 @@ Please be aware that when registering an existing AKS cluster, the cluster might For more information about connecting to an AKS private cluster, see the [AKS documentation.](https://docs.microsoft.com/en-us/azure/aks/private-clusters#options-for-connecting-to-the-private-cluster) +## Setting Up the Minimum Permission Role with the Azure Command Line Tool + +1. Create the Minimum Rancher AKSv2 Permission Role by running this command: + + ``` + cat >> rancher-azure.json << EOF + + { + "Name": "Rancher AKSv2", + "IsCustom": true, + "Description": "Everything needed by Rancher AKSv2 operator", + "Actions": [ + "Microsoft.Compute/disks/delete", + "Microsoft.Compute/disks/read", + "Microsoft.Compute/disks/write", + "Microsoft.Compute/diskEncryptionSets/read", + "Microsoft.Compute/locations/DiskOperations/read", + "Microsoft.Compute/locations/vmSizes/read", + "Microsoft.Compute/locations/operations/read", + "Microsoft.Compute/proximityPlacementGroups/write", + "Microsoft.Compute/snapshots/delete", + "Microsoft.Compute/snapshots/read", + "Microsoft.Compute/snapshots/write", + "Microsoft.Compute/virtualMachineScaleSets/manualUpgrade/action", + "Microsoft.Compute/virtualMachineScaleSets/delete", + "Microsoft.Compute/virtualMachineScaleSets/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/networkInterfaces/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/networkInterfaces/ipconfigurations/publicipaddresses/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualmachines/instanceView/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/write", + "Microsoft.Compute/virtualMachineScaleSets/write", + "Microsoft.Compute/virtualMachines/read", + "Microsoft.Compute/virtualMachines/write", + "Microsoft.ContainerService/managedClusters/read", + "Microsoft.ContainerService/managedClusters/write" + "Microsoft.ContainerService/managedClusters/delete", + "Microsoft.ContainerService/managedClusters/accessProfiles/listCredential/action", + "Microsoft.ContainerService/managedClusters/agentPools/read", + "Microsoft.ContainerService/managedClusters/agentPools/write", + "Microsoft.ManagedIdentity/userAssignedIdentities/assign/action", + "Microsoft.Network/applicationGateways/read", + "Microsoft.Network/applicationGateways/write", + "Microsoft.Network/loadBalancers/write", + "Microsoft.Network/loadBalancers/backendAddressPools/join/action", + "Microsoft.Network/loadBalancers/delete", + "Microsoft.Network/loadBalancers/read", + "Microsoft.Network/networkInterfaces/join/action", + "Microsoft.Network/networkInterfaces/read", + "Microsoft.Network/networkInterfaces/write", + "Microsoft.Network/networkSecurityGroups/read", + "Microsoft.Network/networkSecurityGroups/write", + "Microsoft.Network/publicIPAddresses/delete", + "Microsoft.Network/publicIPAddresses/join/action", + "Microsoft.Network/publicIPAddresses/read", + "Microsoft.Network/publicIPAddresses/write", + "Microsoft.Network/publicIPPrefixes/join/action", + "Microsoft.Network/privatednszones/*", + "Microsoft.Network/routeTables/read", + "Microsoft.Network/routeTables/routes/delete", + "Microsoft.Network/routeTables/routes/read", + "Microsoft.Network/routeTables/routes/write", + "Microsoft.Network/routeTables/write", + "Microsoft.Network/virtualNetworks/read", + "Microsoft.Network/virtualNetworks/subnets/join/action", + "Microsoft.Network/virtualNetworks/subnets/read", + "Microsoft.Network/virtualNetworks/joinLoadBalancer/action", + "Microsoft.OperationalInsights/workspaces/sharedkeys/read", + "Microsoft.OperationalInsights/workspaces/read", + "Microsoft.OperationsManagement/solutions/write", + "Microsoft.OperationsManagement/solutions/read", + "Microsoft.Resources/subscriptions/resourcegroups/read", + "Microsoft.Resources/subscriptions/resourcegroups/write", + "Microsoft.Storage/operations/read", + "Microsoft.Storage/storageAccounts/listKeys/action", + "Microsoft.Storage/storageAccounts/delete", + "Microsoft.Storage/storageAccounts/read", + "Microsoft.Storage/storageAccounts/write" + ], + "NotActions": [], + "DataActions": [], + "NotDataActions": [], + "AssignableScopes": [ + "/subscriptions/SUBSCRIPTION_ID" + ] + } + EOF + ``` + +2. Apply the Rancher AKSv2 Role: + + ``` + az role definition create --role-definition rancher-azure.json + ``` + +3. Verify if the Rancher AKSv2 Role was created: + + ``` + az role definition list | grep "Rancher AKSv2" + ``` + ## Syncing The AKS provisioner can synchronize the state of an AKS cluster between Rancher and the provider. For an in-depth technical explanation of how this works, see [Syncing.](../../../../reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md) For information on configuring the refresh interval, see [this section.](../../../../pages-for-subheaders/gke-cluster-configuration.md#configuring-the-refresh-interval) + ## Programmatically Creating AKS Clusters -The most common way to programmatically deploy AKS clusters through Rancher is by using the Rancher2 Terraform provider. The documentation for creating clusters with Terraform is [here.](https://registry.terraform.io/providers/rancher/rancher2/latest/docs/resources/cluster) \ No newline at end of file +The most common way to programmatically deploy AKS clusters through Rancher is by using the Rancher2 Terraform provider. The documentation for creating clusters with Terraform is [here](https://registry.terraform.io/providers/rancher/rancher2/latest/docs/resources/cluster). diff --git a/docs/pages-for-subheaders/rancher-hardening-guides.md b/docs/pages-for-subheaders/rancher-hardening-guides.md index a7ffa3ce2e1..5db6c192945 100644 --- a/docs/pages-for-subheaders/rancher-hardening-guides.md +++ b/docs/pages-for-subheaders/rancher-hardening-guides.md @@ -27,25 +27,25 @@ Each self-assessment guide is accompanied by a hardening guide. These guides wer | Kubernetes Version | CIS Benchmark Version | Self Assessment Guide | Hardening Guides | |--------------------|-----------------------|-----------------------|------------------| | Kubernetes v1.23 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md) | [Link](rke1-hardening-guide.md) | -| Kubernetes v1.24 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md) | [Link](rke1-hardening-guide.md) | -| Kubernetes v1.25 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md) | [Link](rke1-hardening-guide.md) | +| Kubernetes v1.24 | CIS v1.24 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md) | [Link](rke1-hardening-guide.md) | +| Kubernetes v1.25/v1.26/v1.27 | CIS v1.7 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md) | [Link](rke1-hardening-guide.md) | ### RKE2 Guides | Type | Kubernetes Version | CIS Benchmark Version | Self Assessment Guide | Hardening Guides | |------|--------------------|-----------------------|-----------------------|------------------| | Rancher provisioned RKE2 | Kubernetes v1.23 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md) | [Link](rke2-hardening-guide.md) | -| Rancher provisioned RKE2 | Kubernetes v1.24 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md) | [Link](rke2-hardening-guide.md) | -| Rancher provisioned RKE2 | Kubernetes v1.25 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md) | [Link](rke2-hardening-guide.md) | -| Standalone RKE2 | Kubernetes v1.25 | CIS v1.23 | [Link](https://docs.rke2.io/security/cis_self_assessment123) | [Link](https://docs.rke2.io/security/hardening_guide) | +| Rancher provisioned RKE2 | Kubernetes v1.24 | CIS v1.24 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md) | [Link](rke2-hardening-guide.md) | +| Rancher provisioned RKE2 | Kubernetes v1.25/v1.26/v1.27 | CIS v1.7 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md) | [Link](rke2-hardening-guide.md) | +| Standalone RKE2 | Kubernetes v1.25/v1.26/v1.27 | CIS v1.7 | [Link](https://docs.rke2.io/security/cis_self_assessment123) | [Link](https://docs.rke2.io/security/hardening_guide) | ### K3s Guides | Type | Kubernetes Version | CIS Benchmark Version | Self Assessment Guide | Hardening Guides | |------|--------------------|-----------------------|-----------------------|------------------| | Rancher provisioned K3s cluster | Kubernetes v1.23 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md) | [Link](k3s-hardening-guide.md) | -| Rancher provisioned K3s cluster | Kubernetes v1.24 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md) | [Link](k3s-hardening-guide.md) | -| Rancher provisioned K3s cluster | Kubernetes v1.25 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md) | [Link](k3s-hardening-guide.md) | +| Rancher provisioned K3s cluster | Kubernetes v1.24 | CIS v1.24 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md) | [Link](k3s-hardening-guide.md) | +| Rancher provisioned K3s cluster | Kubernetes v1.25/v1.26/v1.27 | CIS v1.7 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md) | [Link](k3s-hardening-guide.md) | | Standalone K3s | Kubernetes v1.22 up to v1.24 | CIS v1.23 | [Link](https://docs.k3s.io/security/self-assessment) | [Link](https://docs.k3s.io/security/hardening-guide) | ## Rancher with SELinux diff --git a/docs/reference-guides/about-the-api/api-tokens.md b/docs/reference-guides/about-the-api/api-tokens.md index eccd4d962b1..5fe8a0eb5a4 100644 --- a/docs/reference-guides/about-the-api/api-tokens.md +++ b/docs/reference-guides/about-the-api/api-tokens.md @@ -3,7 +3,7 @@ title: API Tokens --- - + By default, some cluster-level API tokens are generated with infinite time-to-live (`ttl=0`). In other words, API tokens with `ttl=0` never expire unless you invalidate them. Tokens are not invalidated by changing a password. diff --git a/docs/reference-guides/backup-restore-configuration/backup-configuration.md b/docs/reference-guides/backup-restore-configuration/backup-configuration.md index 313a3de1d83..2bb79d074b7 100644 --- a/docs/reference-guides/backup-restore-configuration/backup-configuration.md +++ b/docs/reference-guides/backup-restore-configuration/backup-configuration.md @@ -3,7 +3,7 @@ title: Backup Configuration --- - + The **Backup: Create** page lets you configure a schedule, enable encryption and specify the storage location for your backups. diff --git a/docs/reference-guides/backup-restore-configuration/examples.md b/docs/reference-guides/backup-restore-configuration/examples.md index 32a1eb76c6a..0afd8a359fb 100644 --- a/docs/reference-guides/backup-restore-configuration/examples.md +++ b/docs/reference-guides/backup-restore-configuration/examples.md @@ -3,7 +3,7 @@ title: Examples --- - + This section contains examples of Backup and Restore custom resources. diff --git a/docs/reference-guides/backup-restore-configuration/restore-configuration.md b/docs/reference-guides/backup-restore-configuration/restore-configuration.md index 5e958fcd674..b162a6ef873 100644 --- a/docs/reference-guides/backup-restore-configuration/restore-configuration.md +++ b/docs/reference-guides/backup-restore-configuration/restore-configuration.md @@ -3,7 +3,7 @@ title: Restore Configuration --- - + The Restore Create page lets you provide details of the backup to restore from diff --git a/docs/reference-guides/backup-restore-configuration/storage-configuration.md b/docs/reference-guides/backup-restore-configuration/storage-configuration.md index 3ad8b94487f..b1b8bad0896 100644 --- a/docs/reference-guides/backup-restore-configuration/storage-configuration.md +++ b/docs/reference-guides/backup-restore-configuration/storage-configuration.md @@ -3,7 +3,7 @@ title: Backup Storage Location Configuration --- - + Configure a storage location where all backups are saved by default. You will have the option to override this with each backup, but will be limited to using an S3-compatible object store. diff --git a/docs/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md b/docs/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md index 9fc13c9ce70..dc200ae62b1 100644 --- a/docs/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md +++ b/docs/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md @@ -3,7 +3,7 @@ title: Logging Best Practices --- - + In this guide, we recommend best practices for cluster-level logging and application logging. diff --git a/docs/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md b/docs/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md index 9255c76a28b..a6e34b03a50 100644 --- a/docs/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md +++ b/docs/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md @@ -3,7 +3,7 @@ title: Monitoring Best Practices --- - + Configuring sensible monitoring and alerting rules is vital for running any production workloads securely and reliably. This is not different when using Kubernetes and Rancher. Fortunately the integrated monitoring and alerting functionality makes this whole process a lot easier. diff --git a/docs/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md b/docs/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md index 3012223f423..9d24fb3c5db 100644 --- a/docs/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md +++ b/docs/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md @@ -3,7 +3,7 @@ title: Best Practices for Rancher Managed vSphere Clusters --- - + This guide outlines a reference architecture for provisioning downstream Rancher clusters in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. diff --git a/docs/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md b/docs/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md index 1298ff18b87..0cec0a91864 100644 --- a/docs/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md +++ b/docs/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md @@ -3,7 +3,7 @@ title: Tips for Setting Up Containers --- - + Running well-built containers can greatly impact the overall performance and security of your environment. diff --git a/docs/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md b/docs/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md index c19ac243d98..74243559753 100644 --- a/docs/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md +++ b/docs/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md @@ -3,7 +3,7 @@ title: Installing Rancher in a vSphere Environment --- - + This guide outlines a reference architecture for installing Rancher on an RKE Kubernetes cluster in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. diff --git a/docs/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md b/docs/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md index cc8811dc77e..99583f75579 100644 --- a/docs/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md +++ b/docs/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md @@ -3,7 +3,7 @@ title: Rancher Deployment Strategy --- - + There are two recommended deployment strategies for a Rancher instance that manages downstream Kubernetes clusters. Each one has its own pros and cons. Read more about which one would fit best for your use case. diff --git a/docs/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md b/docs/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md index 1863ff82503..1ed05696fa2 100644 --- a/docs/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md +++ b/docs/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md @@ -3,7 +3,7 @@ title: Tips for Running Rancher --- - + This guide is geared toward use cases where Rancher is used to manage downstream Kubernetes clusters. The high-availability setup is intended to prevent losing access to downstream clusters if the Rancher server is not available. diff --git a/docs/reference-guides/cli-with-rancher/kubectl-utility.md b/docs/reference-guides/cli-with-rancher/kubectl-utility.md index 45502753a08..fefa1a66b1b 100644 --- a/docs/reference-guides/cli-with-rancher/kubectl-utility.md +++ b/docs/reference-guides/cli-with-rancher/kubectl-utility.md @@ -3,7 +3,7 @@ title: kubectl Utility --- - + ## kubectl diff --git a/docs/reference-guides/cli-with-rancher/rancher-cli.md b/docs/reference-guides/cli-with-rancher/rancher-cli.md index 44024172658..0c9a27c1694 100644 --- a/docs/reference-guides/cli-with-rancher/rancher-cli.md +++ b/docs/reference-guides/cli-with-rancher/rancher-cli.md @@ -4,7 +4,7 @@ description: Interact with Rancher using command line interface (CLI) tools from --- - + The Rancher CLI (Command Line Interface) is a unified tool that you can use to interact with Rancher. With this tool, you can operate Rancher using a command line rather than the GUI. diff --git a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md index 6043df8f1ba..4640d142697 100644 --- a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md +++ b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md @@ -3,7 +3,7 @@ title: EC2 Machine Configuration Reference --- - + For more details about EC2 nodes, refer to the official documentation for the [EC2 Management Console](https://aws.amazon.com/ec2). diff --git a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md index 98d299762b0..ba7e806295e 100644 --- a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md +++ b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md @@ -3,7 +3,7 @@ title: Azure Machine Configuration --- - + For more information about Azure, refer to the official [Azure documentation.](https://docs.microsoft.com/en-us/azure/?product=featured) diff --git a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md index 1d62fe9d9d7..634c7f48561 100644 --- a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md +++ b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md @@ -3,7 +3,7 @@ title: DigitalOcean Machine Configuration --- - + For more details about DigitalOcean, Droplets, refer to the [official documentation](https://docs.digitalocean.com/products/compute/). diff --git a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md index ffe36cf7723..bd79dabbed5 100644 --- a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md +++ b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md @@ -3,7 +3,7 @@ title: EC2 Node Template Configuration --- - + For more details about EC2, nodes, refer to the official documentation for the [EC2 Management Console](https://aws.amazon.com/ec2). diff --git a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md index e8fa8b382ee..e747dbbb547 100644 --- a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md +++ b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md @@ -3,7 +3,7 @@ title: Azure Node Template Configuration --- - + For more information about Azure, refer to the official [Azure documentation.](https://docs.microsoft.com/en-us/azure/?product=featured) diff --git a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md index 0e679ae7d13..87b5fccdcfb 100644 --- a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md +++ b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md @@ -3,7 +3,7 @@ title: DigitalOcean Node Template Configuration --- - + Account access information is stored as a cloud credential. Cloud credentials are stored as Kubernetes secrets. Multiple node templates can use the same cloud credential. You can use an existing cloud credential or create a new one. diff --git a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md index cbecb1be01b..4e44d5ceca7 100644 --- a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md +++ b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md @@ -3,7 +3,7 @@ title: Nutanix Node Template Configuration --- - + ## Account Access diff --git a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md index 0e665ba93f4..135c3edf7cc 100644 --- a/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md +++ b/docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md @@ -3,7 +3,7 @@ title: VSphere Node Template Configuration --- - + ## Account Access diff --git a/docs/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md b/docs/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md index 136c71a45a2..67cd280e470 100644 --- a/docs/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md +++ b/docs/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md @@ -3,7 +3,7 @@ title: AKS Cluster Configuration Reference --- - + ## Changes in Rancher v2.6 diff --git a/docs/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md b/docs/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md index 5bfe091028c..ba6b826b4f1 100644 --- a/docs/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md +++ b/docs/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md @@ -3,7 +3,7 @@ title: EKS Cluster Configuration Reference --- - + ### Account Access diff --git a/docs/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md b/docs/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md index 60228c3fb97..120be47a641 100644 --- a/docs/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md +++ b/docs/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md @@ -3,7 +3,7 @@ title: Private Clusters --- - + In GKE, [private clusters](https://cloud.google.com/kubernetes-engine/docs/concepts/private-cluster-concept) are clusters whose nodes are isolated from inbound and outbound traffic by assigning them internal IP addresses only. Private clusters in GKE have the option of exposing the control plane endpoint as a publicly accessible address or as a private address. This is different from other Kubernetes providers, which may refer to clusters with private control plane endpoints as "private clusters" but still allow traffic to and from nodes. You may want to create a cluster with private nodes, with or without a public control plane endpoint, depending on your organization's networking and security requirements. A GKE cluster provisioned from Rancher can use isolated nodes by selecting "Private Cluster" in the Cluster Options (under "Show advanced options"). The control plane endpoint can optionally be made private by selecting "Enable Private Endpoint". diff --git a/docs/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md b/docs/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md index 94c3b2c3442..6d260b3dd68 100644 --- a/docs/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md +++ b/docs/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md @@ -127,7 +127,7 @@ ACE is available on RKE, RKE2, and K3s clusters that are provisioned or register ::: -ACE must be set up [manually](../../../how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/register-existing-clusters#authorized-cluster-endpoint-support-for-rke2-and-k3s-clusters.md) on RKE2 and K3s clusters. In RKE, ACE is enabled by default in Rancher-launched Kubernetes clusters, using the IP of the node with the `controlplane` role and the default Kubernetes self-signed certificates. +ACE must be set up [manually](../../../how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/register-existing-clusters.md#authorized-cluster-endpoint-support-for-rke2-and-k3s-clusters) on RKE2 and K3s clusters. In RKE, ACE is enabled by default in Rancher-launched Kubernetes clusters, using the IP of the node with the `controlplane` role and the default Kubernetes self-signed certificates. For more detail on how an authorized cluster endpoint works and why it is used, refer to the [architecture section.](../../../reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md#4-authorized-cluster-endpoint) diff --git a/docs/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md b/docs/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md index 9ccc2cfe9f0..63fa8df3511 100644 --- a/docs/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md +++ b/docs/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md @@ -3,7 +3,7 @@ title: Syncing --- - + Syncing allows Rancher to update cluster values so that they're up to date with the corresponding cluster object hosted in AKS, EKS or GKE. This enables sources other than Rancher to own a hosted cluster’s state. diff --git a/docs/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md b/docs/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md index a0e092fee87..3c363d053cf 100644 --- a/docs/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md +++ b/docs/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md @@ -3,7 +3,7 @@ title: Rancher Agent Options --- - + Rancher deploys an agent on each node to communicate with the node. This pages describes the options that can be passed to the agent. To use these options, you will need to [create a cluster with custom nodes](../../../../pages-for-subheaders/use-existing-nodes.md) and add the options to the generated `docker run` command when adding a node. diff --git a/docs/reference-guides/monitoring-v2-configuration/examples.md b/docs/reference-guides/monitoring-v2-configuration/examples.md index 7c586657eb2..c65722cfa97 100644 --- a/docs/reference-guides/monitoring-v2-configuration/examples.md +++ b/docs/reference-guides/monitoring-v2-configuration/examples.md @@ -3,7 +3,7 @@ title: Examples --- - + ### ServiceMonitor diff --git a/docs/reference-guides/monitoring-v2-configuration/helm-chart-options.md b/docs/reference-guides/monitoring-v2-configuration/helm-chart-options.md index fabd9fc222f..112c41c9ea0 100644 --- a/docs/reference-guides/monitoring-v2-configuration/helm-chart-options.md +++ b/docs/reference-guides/monitoring-v2-configuration/helm-chart-options.md @@ -3,7 +3,7 @@ title: Helm Chart Options --- - + ## Configuring Resource Limits and Requests diff --git a/docs/reference-guides/monitoring-v2-configuration/receivers.md b/docs/reference-guides/monitoring-v2-configuration/receivers.md index eb3a029b45b..dc459f34378 100644 --- a/docs/reference-guides/monitoring-v2-configuration/receivers.md +++ b/docs/reference-guides/monitoring-v2-configuration/receivers.md @@ -3,7 +3,7 @@ title: Receiver Configuration --- - + The [Alertmanager Config](https://prometheus.io/docs/alerting/latest/configuration/#configuration-file) Secret contains the configuration of an Alertmanager instance that sends out notifications based on alerts it receives from Prometheus. diff --git a/docs/reference-guides/monitoring-v2-configuration/routes.md b/docs/reference-guides/monitoring-v2-configuration/routes.md index 339dd2a606a..f79d1e190c6 100644 --- a/docs/reference-guides/monitoring-v2-configuration/routes.md +++ b/docs/reference-guides/monitoring-v2-configuration/routes.md @@ -3,7 +3,7 @@ title: Route Configuration --- - + The route configuration is the section of the Alertmanager custom resource that controls how the alerts fired by Prometheus are grouped and filtered before they reach the receiver. diff --git a/docs/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md b/docs/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md index 780d13c2673..30fccb634c8 100644 --- a/docs/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md +++ b/docs/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md @@ -3,7 +3,7 @@ title: ServiceMonitor and PodMonitor Configuration --- - + ServiceMonitors and PodMonitors are both pseudo-CRDs that map the scrape configuration of the Prometheus custom resource. diff --git a/docs/reference-guides/prometheus-federator/rbac.md b/docs/reference-guides/prometheus-federator/rbac.md index 47887415d85..8b54ce9559f 100644 --- a/docs/reference-guides/prometheus-federator/rbac.md +++ b/docs/reference-guides/prometheus-federator/rbac.md @@ -2,6 +2,10 @@ title: Role-Based Access Control --- + + + + This section describes the expectations for Role-Based Access Control (RBAC) for Prometheus Federator. As described in the section on [namespaces](../../pages-for-subheaders/prometheus-federator.md#namespaces), Prometheus Federator expects that Project Owners, Project Members, and other users in the cluster with Project-level permissions (e.g. permissions in a certain set of namespaces identified by a single label selector) have minimal permissions in any namespaces except the Project Registration Namespace (which is imported into the project by default) and those that already comprise their projects. Therefore, in order to allow Project Owners to assign specific chart permissions to other users in their Project namespaces, the Helm Project Operator will automatically watch the following bindings: diff --git a/docs/reference-guides/rancher-manager-architecture/architecture-recommendations.md b/docs/reference-guides/rancher-manager-architecture/architecture-recommendations.md index d68f5b9320c..1ece990ff8c 100644 --- a/docs/reference-guides/rancher-manager-architecture/architecture-recommendations.md +++ b/docs/reference-guides/rancher-manager-architecture/architecture-recommendations.md @@ -2,6 +2,10 @@ title: Architecture Recommendations --- + + + + If you are installing Rancher on a single node, the main architecture recommendation that applies to your installation is that the node running Rancher should be [separate from downstream clusters.](#separation-of-rancher-and-user-clusters) ## Separation of Rancher and User Clusters diff --git a/docs/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md b/docs/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md index e5c59a2e3d8..08639d4b819 100644 --- a/docs/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md +++ b/docs/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md @@ -2,6 +2,10 @@ title: Communicating with Downstream User Clusters --- + + + + This section describes how Rancher provisions and manages the downstream user clusters that run your apps and services. The below diagram shows how the cluster controllers, cluster agents, and node agents allow Rancher to control downstream clusters. diff --git a/docs/reference-guides/rancher-manager-architecture/rancher-server-and-components.md b/docs/reference-guides/rancher-manager-architecture/rancher-server-and-components.md index bb1cf170e7a..e9fec332622 100644 --- a/docs/reference-guides/rancher-manager-architecture/rancher-server-and-components.md +++ b/docs/reference-guides/rancher-manager-architecture/rancher-server-and-components.md @@ -2,6 +2,10 @@ title: Rancher Server and Components --- + + + + The majority of Rancher 2.x software runs on the Rancher Server. Rancher Server includes all the software components used to manage the entire Rancher deployment. The figure below illustrates the high-level architecture of Rancher 2.x. The figure depicts a Rancher Server installation that manages two downstream Kubernetes clusters: one created by RKE and another created by Amazon EKS (Elastic Kubernetes Service). diff --git a/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md b/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md index ddf9809440a..d0ddba7d1e7 100644 --- a/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md +++ b/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md @@ -2,6 +2,10 @@ title: K3s Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.23 --- + + + + This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: diff --git a/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md b/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md deleted file mode 100644 index 8944de04c27..00000000000 --- a/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md +++ /dev/null @@ -1,3148 +0,0 @@ ---- -title: K3s Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.24 ---- - -This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.23 | Kubernetes v1.24 | - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.23. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -Each control in the CIS Kubernetes Benchmark was evaluated against a K3s cluster that was configured according to the accompanying hardening guide. - -Where control audits differ from the original CIS benchmark, the audit commands specific to K3s are provided for testing. - -These are the possible results for each control: - -- **Pass** - The K3s cluster passes the audit outlined in the benchmark. -- **Not Applicable** - The control is not applicable to K3s because of how it is designed to operate. The remediation section explains why. -- **Warn** - The control is manual in the CIS benchmark and it depends on the cluster's use-case or some other factor that must be determined by the cluster operator. These controls have been evaluated to ensure K3s doesn't prevent their implementation, but no further configuration or auditing of the cluster has been performed. - -This guide makes the assumption that K3s is running as a Systemd unit. Your installation may vary. Adjust the "audit" commands to fit your scenario. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Control Plane Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the -control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-apiserver.yaml - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-controller-manager.yaml - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-scheduler.yaml - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 /etc/kubernetes/manifests/etcd.yaml - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /etc/kubernetes/manifests/etcd.yaml - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 1.1.11 -``` - -**Expected Result**: - -```console -'700' is equal to '700' -``` - -**Returned Value**: - -```console -700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** Not Applicable - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/admin.conf - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 scheduler - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root scheduler - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 controllermanager - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root controllermanager - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/server/tls -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown -R root:root /etc/kubernetes/pki/ - -**Audit:** - -```bash -find /var/lib/rancher/k3s/server/tls | xargs stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Manual) - - -**Result:** warn - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 644 /etc/kubernetes/pki/*.crt - -**Audit:** - -```bash -stat -c %n %a /var/lib/rancher/k3s/server/tls/*.crt -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) - - -**Result:** warn - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /etc/kubernetes/pki/*.key - -**Audit:** - -```bash -stat -c %n %a /var/lib/rancher/k3s/server/tls/*.key -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth' -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep containerd | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' is present OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 521 1 0 22:09 ? 00:00:00 /usr/bin/containerd root 802 1 0 22:09 ? 00:00:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 3970 1 0 22:13 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 836d5508918bf22689e12f2885aeb9de5c2420beb956f6dc587d11b049e4edf4 -address /run/k3s/containerd/containerd.sock root 4088 1 0 22:13 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 6148f976b57db791da86119c599700f683df838df56b1382d428ec38402caa64 -address /run/k3s/containerd/containerd.sock root 4109 1 0 22:13 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id b0e22b39e80606c4ad5d7fdafe21a771a27a5dce8f06155af579a9fad8158219 -address /run/k3s/containerd/containerd.sock root 5321 1 0 22:14 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id f60b96ef6beaf1b7903aba944af101a7d401082969ad8b5aea633bda1043b165 -address /run/k3s/containerd/containerd.sock root 5395 1 0 22:14 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id df001d7d85239f1cfdd8e041db801a6383bc18e5e10d0cd8e8e4e6ca9b7ce036 -address /run/k3s/containerd/containerd.sock root 6366 1 0 22:15 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id a900df9f736ca35b5dbd603034588a461d706ae6c83529136a81ec13e0ecedc0 -address /run/k3s/containerd/containerd.sock root 7859 1 0 22:15 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id b3c1510cafad33b31758db1b7c771efe98f0d395d5d52caf90db7bd379966299 -address /run/k3s/containerd/containerd.sock root 7896 1 0 22:15 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id e5720fc8f9e95f2fd8b8e87c93f25213315d78b630fc889b2a5cb8b18f2a1442 -address /run/k3s/containerd/containerd.sock root 9773 9761 4 22:22 ? 00:00:16 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 10275 1 0 22:22 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 8b29d2205c5f7d47d0ecd4f95b7b96062454233e66450f9163058647e7b5c390 -address /run/k3s/containerd/containerd.sock root 11185 1 0 22:23 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9581871a145dd1c0bbff06cddea0030a30de2760e90c5fa9154cccb250f05faa -address /run/k3s/containerd/containerd.sock root 13605 1 0 22:27 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id e05825dc2a33d576c35cc1b56610d3e4459d209524645f95f163c100f6e5df46 -address /run/k3s/containerd/containerd.sock root 13770 1 0 22:27 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 74d10151f05f78b0d38deb2b1ee045bf7b72e7b879e6a15112c8495f98d230b8 -address /run/k3s/containerd/containerd.sock -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'AlwaysPullImages' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'ServiceAccount' -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port' -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling' -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-path' -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxage' -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxbackup' -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxsize' -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.23 Ensure that the --request-timeout argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameter as appropriate and if needed. -For example, --request-timeout=300s - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'request-timeout' -``` - -**Expected Result**: - -```console -'--request-timeout' is not present OR '--request-timeout' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-lookup' -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.25 Ensure that the --service-account-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-key-file' -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 1.2.29 -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep -A1 'Running kube-apiserver' | tail -n2 -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile' -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'encryption-provider-config' -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.31 Ensure that encryption providers are appropriately configured (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit:** - -```bash -grep aescbc /path/to/encryption-config.json -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites' -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) - - -**Result:** warn - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold' -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling' -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials' -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file' -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file' -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'bind-address' -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address' -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.1 -``` - -**Expected Result**: - -```console -'cert-file' is present AND 'key-file' is present -``` - -**Returned Value**: - -```console -cert-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.key -``` - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and set the below parameter. ---client-cert-auth="true" - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.2 -``` - -**Expected Result**: - -```console -'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -client-cert-auth: true -``` - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.3 -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.4 -``` - -**Expected Result**: - -```console -'cert-file' is present AND 'key-file' is present -``` - -**Returned Value**: - -```console -cert-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.key -``` - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and set the below parameter. ---peer-client-cert-auth=true - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.5 -``` - -**Expected Result**: - -```console -'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -client-cert-auth: true -``` - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.6 -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Manual) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.7 -``` - -**Expected Result**: - -```console -'trusted-ca-file' is present -``` - -**Returned Value**: - -```console -trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Manual) - - -**Result:** warn - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-policy-file' -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chmod 644 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig -``` - -**Expected Result**: - -```console -'permissions' is present OR '/var/lib/rancher/k3s/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is present OR '/var/lib/rancher/k3s/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/agent/kubelet.kubeconfig -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/agent/kubelet.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/server/tls/server-ca.crt -``` - -**Expected Result**: - -```console -'644' is equal to '644' OR '640' is present OR '600' is present OR '444' is present OR '440' is present OR '400' is present OR '000' is present -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/server/tls/client-ca.crt -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /var/lib/kubelet/config.yaml - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /var/lib/kubelet/config.yaml - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "anonymous-auth" | grep -v grep; else echo "--anonymous-auth=false"; fi' -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "authorization-mode" | grep -v grep; else echo "--authorization-mode=Webhook"; fi' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "client-ca-file" | grep -v grep; else echo "--client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt"; fi' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'read-only-port' -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:03 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:03Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-2 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=995abdc2-f967-4bd6-936e-f3c26594573c --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'streaming-connection-idle-timeout' -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'protect-kernel-defaults' -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -Feb 27 22:22:03 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:03Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-2 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=995abdc2-f967-4bd6-936e-f3c26594573c --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'make-iptables-util-chains' -``` - -**Expected Result**: - -```console -'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:03 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:03Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-2 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=995abdc2-f967-4bd6-936e-f3c26594573c --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:03 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:03Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-2 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=995abdc2-f967-4bd6-936e-f3c26594573c --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Manual) - - -**Result:** warn - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** warn - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) - - -**Result:** warn - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. diff --git a/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md b/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md new file mode 100644 index 00000000000..1d348069a2a --- /dev/null +++ b/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md @@ -0,0 +1,3208 @@ +--- +title: K3s Self-Assessment Guide - CIS Benchmark v1.24 - K8s v1.24 +--- + + + + + +This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.24 | Kubernetes v1.24 | + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.24. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +Each control in the CIS Kubernetes Benchmark was evaluated against a K3s cluster that was configured according to the accompanying hardening guide. + +Where control audits differ from the original CIS benchmark, the audit commands specific to K3s are provided for testing. + +These are the possible results for each control: + +- **Pass** - The K3s cluster passes the audit outlined in the benchmark. +- **Not Applicable** - The control is not applicable to K3s because of how it is designed to operate. The remediation section explains why. +- **Warn** - The control is manual in the CIS benchmark and it depends on the cluster's use-case or some other factor that must be determined by the cluster operator. These controls have been evaluated to ensure K3s doesn't prevent their implementation, but no further configuration or auditing of the cluster has been performed. + +This guide makes the assumption that K3s is running as a Systemd unit. Your installation may vary. Adjust the "audit" commands to fit your scenario. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 644 /etc/kubernetes/manifests/kube-apiserver.yaml + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-controller-manager.yaml + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-scheduler.yaml + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /etc/kubernetes/manifests/etcd.yaml + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /etc/kubernetes/manifests/etcd.yaml + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 1.1.11 +``` + +**Expected Result**: + +```console +'700' is equal to '700' +``` + +**Returned Value**: + +```console +700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** Not Applicable + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 scheduler + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root scheduler + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 controllermanager + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root controllermanager + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/tls +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /etc/kubernetes/pki/ + +**Audit:** + +```bash +find /var/lib/rancher/k3s/server/tls | xargs stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/pki/*.crt + +**Audit:** + +```bash +stat -c %n %a /var/lib/rancher/k3s/server/tls/*.crt +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/pki/*.key + +**Audit:** + +```bash +stat -c %n %a /var/lib/rancher/k3s/server/tls/*.key +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth' +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' is present OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 410 1 0 Sep11 ? 00:01:50 /usr/bin/containerd root 539 1 0 Sep11 ? 00:00:09 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 45213 45195 3 Sep11 ? 00:45:14 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 47188 1 0 Sep11 ? 00:01:00 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 02b8fdd94b7628d575ace92f337dcc93202151d07f33858341cfcb0178fea586 -address /run/k3s/containerd/containerd.sock root 47235 1 0 Sep11 ? 00:00:33 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id eb0f03c4bc1125ae34e5de77c7eaeb9c2c1e46bec0bb106b99281df7353f9ded -address /run/k3s/containerd/containerd.sock root 47948 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5eece7110bd3876414f890ed1b7158eb91f60d1f14450a9f8c77a0fc62b73c4a -address /run/k3s/containerd/containerd.sock root 48047 1 0 Sep11 ? 00:00:32 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4ef831f4bb8830a0a7b46a1e8be58197be00846ea0caa094014ea7ce3adf008e -address /run/k3s/containerd/containerd.sock root 48220 1 0 Sep11 ? 00:00:33 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id f8d5d3791ad2b1a8534476aa2fbdf8da1e4f0b9fdcdd26b1ae161142458a5336 -address /run/k3s/containerd/containerd.sock root 48878 1 0 Sep11 ? 00:00:32 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 41b93a6581e272b0852257b3d7c44ab4cadcdf465a3579a8b29b493ea75feaf7 -address /run/k3s/containerd/containerd.sock root 49870 1 0 Sep11 ? 00:00:30 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id be329cdccda4049f048c759a2b1915cd72526473ff7768e895bcfc153a66c125 -address /run/k3s/containerd/containerd.sock root 50271 1 0 Sep11 ? 00:00:32 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id cceb5d26eba7d7d3c474a2dc842b72495689f4e40055505ea2598e4ac6849d40 -address /run/k3s/containerd/containerd.sock root 50571 1 0 Sep11 ? 00:00:32 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3a26e691e0d0186165d523bef22b0af71f175c39df82845b32ce7b4e3d652d4a -address /run/k3s/containerd/containerd.sock root 96693 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9ed77e6e58410f1295f730ba4a8f8daf7aff8f4e896e24219a8fa710729c2287 -address /run/k3s/containerd/containerd.sock root 97726 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 1be4fe50e6bb29d4549f8b03102b5dc15b7669fe56b32beae3f701cf6d2e58cc -address /run/k3s/containerd/containerd.sock root 97923 1 1 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 7c65c47376f36a8980a5bebad7ffdc1abe1853821cf6c4a1d45f1b6be3452062 -address /run/k3s/containerd/containerd.sock +``` + +### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --kubelet-https parameter. + +### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' +``` + +**Expected Result**: + +```console +'--kubelet-certificate-authority' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'ServiceAccount' +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port' +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.18 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling' +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-path' +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxage' +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxbackup' +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxsize' +``` + +**Expected Result**: + +```console +'--audit-log-maxsize' is greater or equal to 100 +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.23 Ensure that the --request-timeout argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameter as appropriate and if needed. +For example, --request-timeout=300s + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'request-timeout' +``` + +**Expected Result**: + +```console +'--request-timeout' is not present OR '--request-timeout' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-lookup' +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.25 Ensure that the --service-account-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-key-file' +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 1.2.29 +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep -A1 'Running kube-apiserver' | tail -n2 +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile' +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'encryption-provider-config' +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.31 Ensure that encryption providers are appropriately configured (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit:** + +```bash +grep aescbc /path/to/encryption-config.json +``` + +### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold' +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling' +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials' +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file' +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file' +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'bind-address' +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address' +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.1 +``` + +**Expected Result**: + +```console +'cert-file' is present AND 'key-file' is present +``` + +**Returned Value**: + +```console +cert-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.key +``` + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and set the below parameter. +--client-cert-auth="true" + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.2 +``` + +**Expected Result**: + +```console +'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +client-cert-auth: true +``` + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.3 +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.4 +``` + +**Expected Result**: + +```console +'cert-file' is present AND 'key-file' is present +``` + +**Returned Value**: + +```console +cert-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.key +``` + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and set the below parameter. +--peer-client-cert-auth=true + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.5 +``` + +**Expected Result**: + +```console +'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +client-cert-auth: true +``` + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.6 +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Manual) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.7 +``` + +**Expected Result**: + +```console +'trusted-ca-file' is present +``` + +**Returned Value**: + +```console +trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Manual) + + +**Result:** warn + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-policy-file' +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +**Returned Value**: + +```console +600 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'600' is equal to '600' +``` + +**Returned Value**: + +```console +600 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/server/tls/server-ca.crt +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +**Returned Value**: + +```console +644 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/tls/client-ca.crt +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/kubelet/config.yaml + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/kubelet/config.yaml + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "anonymous-auth" | grep -v grep; else echo "--anonymous-auth=false"; fi' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "authorization-mode" | grep -v grep; else echo "--authorization-mode=Webhook"; fi' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "client-ca-file" | grep -v grep; else echo "--client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt"; fi' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'read-only-port' +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:32:02 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:32:02Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-3-32 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=cc5faddd-9c87-4a04-97c2-dcf4cbcbe10f --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'streaming-connection-idle-timeout' +``` + +### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--protect-kernel-defaults=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'protect-kernel-defaults' +``` + +**Expected Result**: + +```console +'--protect-kernel-defaults' is equal to 'true' +``` + +**Returned Value**: + +```console +Sep 11 20:32:02 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:32:02Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-3-32 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=cc5faddd-9c87-4a04-97c2-dcf4cbcbe10f --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'make-iptables-util-chains' +``` + +**Expected Result**: + +```console +'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:32:02 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:32:02Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-3-32 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=cc5faddd-9c87-4a04-97c2-dcf4cbcbe10f --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +### 4.2.9 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/kubelet/config.yaml +``` + +**Expected Result**: + +```console +'--event-qps' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 410 1 0 Sep11 ? 00:01:50 /usr/bin/containerd root 45213 45195 3 Sep11 ? 00:45:15 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:32:02 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:32:02Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-3-32 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=cc5faddd-9c87-4a04-97c2-dcf4cbcbe10f --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--rotate-certificates' is present OR '--rotate-certificates' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 410 1 0 Sep11 ? 00:01:50 /usr/bin/containerd root 45213 45195 3 Sep11 ? 00:45:15 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/kubelet/config.yaml +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 410 1 0 Sep11 ? 00:01:50 /usr/bin/containerd root 45213 45195 3 Sep11 ? 00:45:15 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Manual) + + +**Result:** warn + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +### 5.2.7 Minimize the admission of root containers (Automated) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Automated) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md b/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md new file mode 100644 index 00000000000..e7373288b35 --- /dev/null +++ b/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md @@ -0,0 +1,3215 @@ +--- +title: K3s Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25/v1.26/v1.27 +--- + + + + + +This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25/v1.26/v1.27 | + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +Each control in the CIS Kubernetes Benchmark was evaluated against a K3s cluster that was configured according to the accompanying hardening guide. + +Where control audits differ from the original CIS benchmark, the audit commands specific to K3s are provided for testing. + +These are the possible results for each control: + +- **Pass** - The K3s cluster passes the audit outlined in the benchmark. +- **Not Applicable** - The control is not applicable to K3s because of how it is designed to operate. The remediation section explains why. +- **Warn** - The control is manual in the CIS benchmark and it depends on the cluster's use-case or some other factor that must be determined by the cluster operator. These controls have been evaluated to ensure K3s doesn't prevent their implementation, but no further configuration or auditing of the cluster has been performed. + +This guide makes the assumption that K3s is running as a Systemd unit. Your installation may vary. Adjust the "audit" commands to fit your scenario. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-apiserver.yaml +Not Applicable. + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml +Not Applicable. + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-controller-manager.yaml +Not Applicable. + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml +Not Applicable. + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-scheduler.yaml +Not Applicable. + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml +Not Applicable. + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /etc/kubernetes/manifests/etcd.yaml +Not Applicable. + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /etc/kubernetes/manifests/etcd.yaml +Not Applicable. + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 +Not Applicable. + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root +Not Applicable. + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 1.1.11 +``` + +**Expected Result**: + +```console +'700' is equal to '700' +``` + +**Returned Value**: + +```console +700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** Not Applicable + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd +Not Applicable. + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 scheduler + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root scheduler + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 controllermanager + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root controllermanager + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/cred/controller.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /var/lib/rancher/k3s/server/tls + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/tls +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/pki/*.crt + +**Audit:** + +```bash +stat -c %n %a /var/lib/rancher/k3s/server/tls/*.crt +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/pki/*.key + +**Audit:** + +```bash +stat -c %n %a /var/lib/rancher/k3s/server/tls/*.key +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 663 1 0 Sep11 ? 00:00:08 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 3021 1 0 Sep11 ? 00:00:29 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4790d392966915d995e666002c56ed4cce6dd86f305ce2ee390547a1fcbf6c82 -address /run/k3s/containerd/containerd.sock root 3035 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9d73e6a160ccde6c7c7d4ba0df3b9f696e3de2ebfc0f19a1dcbdf13aea496427 -address /run/k3s/containerd/containerd.sock root 3235 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 587f6221ee9f36c877231ada8d816a799dfda186332c33378d1eb16c72cdc87d -address /run/k3s/containerd/containerd.sock root 4435 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a74c9ec7d99785c2f2d4e6826aa80c22eb8b38249e8f99679ece00a818e9b7b3 -address /run/k3s/containerd/containerd.sock root 4985 1 0 Sep11 ? 00:00:53 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b0c9784dbe0fcbe8be10c857976e70ec84a208cb814e87b5ca085a02d434f8c -address /run/k3s/containerd/containerd.sock root 5056 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id f3231ff35f18056e74eda14907f296be15f7ea1c6ae5ab7904e27d4d18183301 -address /run/k3s/containerd/containerd.sock root 5868 1 0 Sep11 ? 00:00:27 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3e908c4d0b10df275bdef6f72fbcfa09517d11cf749236ad020364e14d77bc93 -address /run/k3s/containerd/containerd.sock root 6158 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id bec5780a5c73fa3154aa3b5ee26cdf23202db821205893e7e66ae17e6103e97b -address /run/k3s/containerd/containerd.sock root 7366 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a81b78845bdcaef710314c93e5ea0d0617f37a8929472f7b570ab90c6667f57f -address /run/k3s/containerd/containerd.sock root 97274 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id c90652c935d9e79af45b9a9ac2b4fe315e2a761a0525737fdb95c680123a164c -address /run/k3s/containerd/containerd.sock root 98309 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 431a2763636488efd7d104c228d41f4f2ecd8c06a7fc375d8977ab0d238936a8 -address /run/k3s/containerd/containerd.sock root 98493 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b480d2fa55c8cc0105ec1902887040c017f03d5b1eb6c73c24bb9d523ad9b37 -address /run/k3s/containerd/containerd.sock +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' is present OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 663 1 0 Sep11 ? 00:00:08 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 3021 1 0 Sep11 ? 00:00:29 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4790d392966915d995e666002c56ed4cce6dd86f305ce2ee390547a1fcbf6c82 -address /run/k3s/containerd/containerd.sock root 3035 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9d73e6a160ccde6c7c7d4ba0df3b9f696e3de2ebfc0f19a1dcbdf13aea496427 -address /run/k3s/containerd/containerd.sock root 3235 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 587f6221ee9f36c877231ada8d816a799dfda186332c33378d1eb16c72cdc87d -address /run/k3s/containerd/containerd.sock root 4435 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a74c9ec7d99785c2f2d4e6826aa80c22eb8b38249e8f99679ece00a818e9b7b3 -address /run/k3s/containerd/containerd.sock root 4985 1 0 Sep11 ? 00:00:53 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b0c9784dbe0fcbe8be10c857976e70ec84a208cb814e87b5ca085a02d434f8c -address /run/k3s/containerd/containerd.sock root 5056 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id f3231ff35f18056e74eda14907f296be15f7ea1c6ae5ab7904e27d4d18183301 -address /run/k3s/containerd/containerd.sock root 5868 1 0 Sep11 ? 00:00:27 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3e908c4d0b10df275bdef6f72fbcfa09517d11cf749236ad020364e14d77bc93 -address /run/k3s/containerd/containerd.sock root 6158 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id bec5780a5c73fa3154aa3b5ee26cdf23202db821205893e7e66ae17e6103e97b -address /run/k3s/containerd/containerd.sock root 7366 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a81b78845bdcaef710314c93e5ea0d0617f37a8929472f7b570ab90c6667f57f -address /run/k3s/containerd/containerd.sock root 97274 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id c90652c935d9e79af45b9a9ac2b4fe315e2a761a0525737fdb95c680123a164c -address /run/k3s/containerd/containerd.sock root 98309 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 431a2763636488efd7d104c228d41f4f2ecd8c06a7fc375d8977ab0d238936a8 -address /run/k3s/containerd/containerd.sock root 98493 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b480d2fa55c8cc0105ec1902887040c017f03d5b1eb6c73c24bb9d523ad9b37 -address /run/k3s/containerd/containerd.sock +``` + +### 1.2.4 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.5 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= +Permissive - When generating serving certificates, functionality could break in conjunction with hostname overrides which are required for certain cloud providers. + +### 1.2.6 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.7 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.9 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.10 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' is present +``` + +**Returned Value**: + +```console +root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 663 1 0 Sep11 ? 00:00:08 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 3021 1 0 Sep11 ? 00:00:29 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4790d392966915d995e666002c56ed4cce6dd86f305ce2ee390547a1fcbf6c82 -address /run/k3s/containerd/containerd.sock root 3035 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9d73e6a160ccde6c7c7d4ba0df3b9f696e3de2ebfc0f19a1dcbdf13aea496427 -address /run/k3s/containerd/containerd.sock root 3235 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 587f6221ee9f36c877231ada8d816a799dfda186332c33378d1eb16c72cdc87d -address /run/k3s/containerd/containerd.sock root 4435 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a74c9ec7d99785c2f2d4e6826aa80c22eb8b38249e8f99679ece00a818e9b7b3 -address /run/k3s/containerd/containerd.sock root 4985 1 0 Sep11 ? 00:00:53 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b0c9784dbe0fcbe8be10c857976e70ec84a208cb814e87b5ca085a02d434f8c -address /run/k3s/containerd/containerd.sock root 5056 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id f3231ff35f18056e74eda14907f296be15f7ea1c6ae5ab7904e27d4d18183301 -address /run/k3s/containerd/containerd.sock root 5868 1 0 Sep11 ? 00:00:27 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3e908c4d0b10df275bdef6f72fbcfa09517d11cf749236ad020364e14d77bc93 -address /run/k3s/containerd/containerd.sock root 6158 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id bec5780a5c73fa3154aa3b5ee26cdf23202db821205893e7e66ae17e6103e97b -address /run/k3s/containerd/containerd.sock root 7366 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a81b78845bdcaef710314c93e5ea0d0617f37a8929472f7b570ab90c6667f57f -address /run/k3s/containerd/containerd.sock root 97274 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id c90652c935d9e79af45b9a9ac2b4fe315e2a761a0525737fdb95c680123a164c -address /run/k3s/containerd/containerd.sock root 98309 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 431a2763636488efd7d104c228d41f4f2ecd8c06a7fc375d8977ab0d238936a8 -address /run/k3s/containerd/containerd.sock root 98493 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b480d2fa55c8cc0105ec1902887040c017f03d5b1eb6c73c24bb9d523ad9b37 -address /run/k3s/containerd/containerd.sock +``` + +### 1.2.12 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... +Permissive - Enabling Pod Security Policy can cause applications to unexpectedly fail. + +### 1.2.13 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.14 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.15 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.16 Ensure that the --secure-port argument is not set to 0 - NoteThis recommendation is obsolete and will be deleted per the consensus process (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port' +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.17 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling' +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.18 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log +Permissive. + +### 1.2.19 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 +Permissive. + +### 1.2.20 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 +Permissive. + +### 1.2.21 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 +Permissive. + +### 1.2.22 Ensure that the --request-timeout argument is set as appropriate (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameter as appropriate and if needed. +For example, --request-timeout=300s +Permissive. + +### 1.2.23 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.24 Ensure that the --service-account-key-file argument is set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +### 1.2.25 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 1.2.29 +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.26 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep -A1 'Running kube-apiserver' | tail -n2 +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +### 1.2.27 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.28 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile' +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.29 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= +Permissive - Enabling encryption changes how data can be recovered as data is encrypted. + +### 1.2.30 Ensure that encryption providers are appropriately configured (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. +Permissive - Enabling encryption changes how data can be recovered as data is encrypted. + +### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold' +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling' +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials' +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file' +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file' +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true +Not Applicable. + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 663 1 0 Sep11 ? 00:00:08 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 3021 1 0 Sep11 ? 00:00:29 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4790d392966915d995e666002c56ed4cce6dd86f305ce2ee390547a1fcbf6c82 -address /run/k3s/containerd/containerd.sock root 3035 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9d73e6a160ccde6c7c7d4ba0df3b9f696e3de2ebfc0f19a1dcbdf13aea496427 -address /run/k3s/containerd/containerd.sock root 3235 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 587f6221ee9f36c877231ada8d816a799dfda186332c33378d1eb16c72cdc87d -address /run/k3s/containerd/containerd.sock root 4435 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a74c9ec7d99785c2f2d4e6826aa80c22eb8b38249e8f99679ece00a818e9b7b3 -address /run/k3s/containerd/containerd.sock root 4985 1 0 Sep11 ? 00:00:53 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b0c9784dbe0fcbe8be10c857976e70ec84a208cb814e87b5ca085a02d434f8c -address /run/k3s/containerd/containerd.sock root 5056 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id f3231ff35f18056e74eda14907f296be15f7ea1c6ae5ab7904e27d4d18183301 -address /run/k3s/containerd/containerd.sock root 5868 1 0 Sep11 ? 00:00:27 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3e908c4d0b10df275bdef6f72fbcfa09517d11cf749236ad020364e14d77bc93 -address /run/k3s/containerd/containerd.sock root 6158 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id bec5780a5c73fa3154aa3b5ee26cdf23202db821205893e7e66ae17e6103e97b -address /run/k3s/containerd/containerd.sock root 7366 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a81b78845bdcaef710314c93e5ea0d0617f37a8929472f7b570ab90c6667f57f -address /run/k3s/containerd/containerd.sock root 97274 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id c90652c935d9e79af45b9a9ac2b4fe315e2a761a0525737fdb95c680123a164c -address /run/k3s/containerd/containerd.sock root 98309 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 431a2763636488efd7d104c228d41f4f2ecd8c06a7fc375d8977ab0d238936a8 -address /run/k3s/containerd/containerd.sock root 98493 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b480d2fa55c8cc0105ec1902887040c017f03d5b1eb6c73c24bb9d523ad9b37 -address /run/k3s/containerd/containerd.sock +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address' +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.1 +``` + +**Expected Result**: + +```console +'cert-file' is present AND 'key-file' is present +``` + +**Returned Value**: + +```console +cert-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.key +``` + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and set the below parameter. +--client-cert-auth="true" + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.2 +``` + +**Expected Result**: + +```console +'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +client-cert-auth: true +``` + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.3 +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.4 +``` + +**Expected Result**: + +```console +'cert-file' is present AND 'key-file' is present +``` + +**Returned Value**: + +```console +cert-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.key +``` + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and set the below parameter. +--peer-client-cert-auth=true + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.5 +``` + +**Expected Result**: + +```console +'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +client-cert-auth: true +``` + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.6 +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.7 +``` + +**Expected Result**: + +```console +'trusted-ca-file' is present +``` + +**Returned Value**: + +```console +trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +### 3.1.2 Service account token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of service account tokens. + +### 3.1.3 Bootstrap token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of bootstrap tokens. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Manual) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-policy-file' +``` + +**Expected Result**: + +```console +'--audit-policy-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable - All configuration is passed in as arguments at container run time. + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable. + All configuration is passed in as arguments at container run time. + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +**Returned Value**: + +```console +600 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/server/tls/server-ca.crt +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +**Returned Value**: + +```console +644 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/tls/client-ca.crt +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/kubelet/config.yaml + +### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/kubelet/config.yaml +Not Applicable. +All configuration is passed in as arguments at container run time. + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "anonymous-auth" | grep -v grep; else echo "--anonymous-auth=false"; fi' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "authorization-mode" | grep -v grep; else echo "--authorization-mode=Webhook"; fi' +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "client-ca-file" | grep -v grep; else echo "--client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt"; fi' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'read-only-port' +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:15 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:15Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-12-34 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=af02ecbc-1e4e-422e-8b4d-4b2aa24a9d46 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'streaming-connection-idle-timeout' +``` + +### 4.2.6 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'make-iptables-util-chains' +``` + +**Expected Result**: + +```console +'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:15 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:15Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-12-34 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=af02ecbc-1e4e-422e-8b4d-4b2aa24a9d46 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.7 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable. + +### 4.2.8 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--event-qps' is present OR '--event-qps' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.9 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** Not Applicable + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service +Permissive - When generating serving certificates, functionality could break in conjunction with hostname overrides which are required for certain cloud providers. + +### 4.2.10 Ensure that the --rotate-certificates argument is not set to false (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--rotate-certificates' is present OR '--rotate-certificates' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.11 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** pass + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable. + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/kubelet/config.yaml +``` + +**Expected Result**: + +```console +'RotateKubeletServerCertificate' is present OR 'RotateKubeletServerCertificate' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.12 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.13 Ensure that a limit is set on pod PIDs (Manual) + + +**Result:** warn + +**Remediation:** +Decide on an appropriate level for this parameter and set it, +either via the --pod-max-pids command line parameter or the PodPidsLimit configuration file setting. + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--pod-max-pids' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Manual) + + +**Result:** pass + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +**Audit Script:** `check_for_default_sa.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) +if [[ ${count_sa} -gt 0 ]]; then + echo "false" + exit +fi + +for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") +do + for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[]?.kind=="ServiceAccount" and .subjects[]?.name=="default") or (.subjects[]?.kind=="Group" and .subjects[]?.name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') + do + read kind name <<<$(IFS=","; echo $result) + resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[]? != "podsecuritypolicies")' | wc -l) + if [[ ${resource_count} -gt 0 ]]; then + echo "false" + exit + fi + done +done + + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_default_sa.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +### 5.1.9 Minimize access to create persistent volumes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to PersistentVolume objects in the cluster. + +### 5.1.10 Minimize access to the proxy sub-resource of nodes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the proxy sub-resource of node objects. + +### 5.1.11 Minimize access to the approval sub-resource of certificatesigningrequests objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the approval sub-resource of certificatesigningrequest objects. + +### 5.1.12 Minimize access to webhook configuration objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the validatingwebhookconfigurations or mutatingwebhookconfigurations objects + +### 5.1.13 Minimize access to the service account token creation (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the token sub-resource of serviceaccount objects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +### 5.2.7 Minimize the admission of root containers (Automated) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Automated) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md b/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md deleted file mode 100644 index 16614a7e520..00000000000 --- a/docs/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md +++ /dev/null @@ -1,3148 +0,0 @@ ---- -title: K3s Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25 ---- - -This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25 | - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -Each control in the CIS Kubernetes Benchmark was evaluated against a K3s cluster that was configured according to the accompanying hardening guide. - -Where control audits differ from the original CIS benchmark, the audit commands specific to K3s are provided for testing. - -These are the possible results for each control: - -- **Pass** - The K3s cluster passes the audit outlined in the benchmark. -- **Not Applicable** - The control is not applicable to K3s because of how it is designed to operate. The remediation section explains why. -- **Warn** - The control is manual in the CIS benchmark and it depends on the cluster's use-case or some other factor that must be determined by the cluster operator. These controls have been evaluated to ensure K3s doesn't prevent their implementation, but no further configuration or auditing of the cluster has been performed. - -This guide makes the assumption that K3s is running as a Systemd unit. Your installation may vary. Adjust the "audit" commands to fit your scenario. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Control Plane Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the -control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-apiserver.yaml - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-controller-manager.yaml - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-scheduler.yaml - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 /etc/kubernetes/manifests/etcd.yaml - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /etc/kubernetes/manifests/etcd.yaml - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 1.1.11 -``` - -**Expected Result**: - -```console -'700' is equal to '700' -``` - -**Returned Value**: - -```console -700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** Not Applicable - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/admin.conf - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 scheduler - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root scheduler - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 controllermanager - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root controllermanager - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/server/tls -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown -R root:root /etc/kubernetes/pki/ - -**Audit:** - -```bash -find /var/lib/rancher/k3s/server/tls | xargs stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Manual) - - -**Result:** warn - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 644 /etc/kubernetes/pki/*.crt - -**Audit:** - -```bash -stat -c %n %a /var/lib/rancher/k3s/server/tls/*.crt -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) - - -**Result:** warn - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /etc/kubernetes/pki/*.key - -**Audit:** - -```bash -stat -c %n %a /var/lib/rancher/k3s/server/tls/*.key -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth' -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep containerd | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' is present OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 519 1 0 22:09 ? 00:00:00 /usr/bin/containerd root 801 1 0 22:09 ? 00:00:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 3864 1 0 22:31 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id d00174abbc275f6bb85c7f0be1d3154b9c91982a10b9dba6b5cb280f4d4c531d -address /run/k3s/containerd/containerd.sock root 4105 1 0 22:31 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 7c2b546b4d2380bcb51278661f34cff94fad2ba06978e13f8f1b92dafcc89d43 -address /run/k3s/containerd/containerd.sock root 4206 1 0 22:31 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 68d8a55ff4663985be004608dbf78b0362f5522e18490c81d4c8dc9963de1556 -address /run/k3s/containerd/containerd.sock root 5374 1 0 22:31 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id ca0ae9e0b37dfd7b1ce05f72e1bc5a1be8f5cb08f2b4543081536de3bdbc925d -address /run/k3s/containerd/containerd.sock root 5443 1 0 22:31 ? 00:00:01 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3ea3c1cdbbd5adb8efd5c67a46aadd0fca9918dc0ad1f7cafe38b83171e3dc1b -address /run/k3s/containerd/containerd.sock root 7130 1 0 22:32 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4d838297d35a31003106ac5989c3547433985bb2964b47baad12cee6e375645e -address /run/k3s/containerd/containerd.sock root 7639 1 0 22:32 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 341cb9bcd8486aa2f1acb8e1ae51baebd630ac6ed266643266c34d677f61c7d0 -address /run/k3s/containerd/containerd.sock root 10308 1 0 23:17 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id c534fbee8e0d06fd9b29bf8fc70a138975c6b18db25f1faf2615677dfdb4199e -address /run/k3s/containerd/containerd.sock root 11370 1 0 23:18 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4ff4b8776dac7a35b83616d341dbe4d5a689ac7fb9b8eee8db5978e3968380ea -address /run/k3s/containerd/containerd.sock root 13736 13723 2 23:21 ? 00:00:10 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 16022 1 0 23:29 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9027256349086e458119478e5e00384b1b76fbf5e6dbee23699f596a88d9f2bc -address /run/k3s/containerd/containerd.sock root 16159 1 0 23:29 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 929bf369fc5881654f4c1925624151ddb7cea51073267b8d213d966ba45406f3 -address /run/k3s/containerd/containerd.sock -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'AlwaysPullImages' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'ServiceAccount' -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port' -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling' -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-path' -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxage' -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxbackup' -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxsize' -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.23 Ensure that the --request-timeout argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameter as appropriate and if needed. -For example, --request-timeout=300s - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'request-timeout' -``` - -**Expected Result**: - -```console -'--request-timeout' is not present OR '--request-timeout' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-lookup' -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.25 Ensure that the --service-account-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-key-file' -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 1.2.29 -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep -A1 'Running kube-apiserver' | tail -n2 -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile' -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'encryption-provider-config' -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.31 Ensure that encryption providers are appropriately configured (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit:** - -```bash -grep aescbc /path/to/encryption-config.json -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites' -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) - - -**Result:** warn - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold' -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling' -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials' -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file' -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file' -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'bind-address' -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address' -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.1 -``` - -**Expected Result**: - -```console -'cert-file' is present AND 'key-file' is present -``` - -**Returned Value**: - -```console -cert-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.key -``` - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and set the below parameter. ---client-cert-auth="true" - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.2 -``` - -**Expected Result**: - -```console -'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -client-cert-auth: true -``` - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.3 -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.4 -``` - -**Expected Result**: - -```console -'cert-file' is present AND 'key-file' is present -``` - -**Returned Value**: - -```console -cert-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.key -``` - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and set the below parameter. ---peer-client-cert-auth=true - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.5 -``` - -**Expected Result**: - -```console -'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -client-cert-auth: true -``` - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.6 -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Manual) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.7 -``` - -**Expected Result**: - -```console -'trusted-ca-file' is present -``` - -**Returned Value**: - -```console -trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Manual) - - -**Result:** warn - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-policy-file' -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chmod 644 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig -``` - -**Expected Result**: - -```console -'permissions' is present OR '/var/lib/rancher/k3s/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is present OR '/var/lib/rancher/k3s/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/agent/kubelet.kubeconfig -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/agent/kubelet.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/server/tls/server-ca.crt -``` - -**Expected Result**: - -```console -'644' is equal to '644' OR '640' is present OR '600' is present OR '444' is present OR '440' is present OR '400' is present OR '000' is present -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/server/tls/client-ca.crt -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /var/lib/kubelet/config.yaml - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /var/lib/kubelet/config.yaml - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "anonymous-auth" | grep -v grep; else echo "--anonymous-auth=false"; fi' -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "authorization-mode" | grep -v grep; else echo "--authorization-mode=Webhook"; fi' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "client-ca-file" | grep -v grep; else echo "--client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt"; fi' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'read-only-port' -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:44 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:44Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-124 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c42d922-ed1e-4e15-8414-d399d179d897 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'streaming-connection-idle-timeout' -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'protect-kernel-defaults' -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -Feb 27 23:21:44 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:44Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-124 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c42d922-ed1e-4e15-8414-d399d179d897 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'make-iptables-util-chains' -``` - -**Expected Result**: - -```console -'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:44 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:44Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-124 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c42d922-ed1e-4e15-8414-d399d179d897 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:44 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:44Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-124 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c42d922-ed1e-4e15-8414-d399d179d897 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Manual) - - -**Result:** warn - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** warn - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) - - -**Result:** warn - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md b/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md index 34bb63f89f0..9c6d1369a90 100644 --- a/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md +++ b/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md @@ -2,6 +2,10 @@ title: RKE Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.23 --- + + + + This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md b/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md deleted file mode 100644 index 25108b848b5..00000000000 --- a/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md +++ /dev/null @@ -1,3084 +0,0 @@ ---- -title: RKE Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.24 ---- - -This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.23 | Kubernetes v1.24 | - -This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.23. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -Rancher and RKE install Kubernetes services via Docker containers. Configuration is defined by arguments passed to the container at the time of initialization, not via configuration files. - -Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Control Plane Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. -All configuration is passed in as arguments at container run time. - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. -All configuration is passed in as arguments at container run time. - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. -All configuration is passed in as arguments at container run time. - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. -All configuration is passed in as arguments at container run time. - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 permissions=600 -``` - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root -``` - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit:** - -```bash -stat -c %a /node/var/lib/etcd -``` - -**Expected Result**: - -```console -'700' is equal to '700' -``` - -**Returned Value**: - -```console -700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** Not Applicable - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the master node. -For example, -chown -R root:root /etc/kubernetes/pki/ - -**Audit Script:** `check_files_owner_in_dir.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the owner is set to root:root for -# the given directory and all the files in it -# -# inputs: -# $1 = /full/path/to/directory -# -# outputs: -# true/false - -INPUT_DIR=$1 - -if [[ "${INPUT_DIR}" == "" ]]; then - echo "false" - exit -fi - -if [[ $(stat -c %U:%G ${INPUT_DIR}) != "root:root" ]]; then - echo "false" - exit -fi - -statInfoLines=$(stat -c "%n %U:%G" ${INPUT_DIR}/*) -while read -r statInfoLine; do - f=$(echo ${statInfoLine} | cut -d' ' -f1) - p=$(echo ${statInfoLine} | cut -d' ' -f2) - - if [[ $(basename "$f" .pem) == "kube-etcd-"* ]]; then - if [[ "$p" != "root:root" && "$p" != "etcd:etcd" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "root:root" ]]; then - echo "false" - exit - fi - fi -done <<< "${statInfoLines}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_owner_in_dir.sh /node/etc/kubernetes/ssl -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the master node. -For example, -chmod -R 644 /etc/kubernetes/pki/*.crt - -**Audit Script:** `check_files_permissions.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the file permissions are set to 644 or -# more restrictive for all files in a given directory or a wildcard -# selection of files -# -# inputs: -# $1 = /full/path/to/directory or /path/to/fileswithpattern -# ex: !(*key).pem -# -# $2 (optional) = permission (ex: 600) -# -# outputs: -# true/false - -# Turn on "extended glob" for use of '!' in wildcard -shopt -s extglob - -# Turn off history to avoid surprises when using '!' -set -H - -USER_INPUT=$1 - -if [[ "${USER_INPUT}" == "" ]]; then - echo "false" - exit -fi - - -if [[ -d ${USER_INPUT} ]]; then - PATTERN="${USER_INPUT}/*" -else - PATTERN="${USER_INPUT}" -fi - -PERMISSION="" -if [[ "$2" != "" ]]; then - PERMISSION=$2 -fi - -FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) - -while read -r fileInfo; do - p=$(echo ${fileInfo} | cut -d' ' -f2) - - if [[ "${PERMISSION}" != "" ]]; then - if [[ "$p" != "${PERMISSION}" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then - echo "false" - exit - fi - fi -done <<< "${FILES_PERMISSIONS}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_permissions.sh '/node/etc/kubernetes/ssl/!(*key).pem' -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /etc/kubernetes/ssl/*key.pem - -**Audit Script:** `check_files_permissions.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the file permissions are set to 644 or -# more restrictive for all files in a given directory or a wildcard -# selection of files -# -# inputs: -# $1 = /full/path/to/directory or /path/to/fileswithpattern -# ex: !(*key).pem -# -# $2 (optional) = permission (ex: 600) -# -# outputs: -# true/false - -# Turn on "extended glob" for use of '!' in wildcard -shopt -s extglob - -# Turn off history to avoid surprises when using '!' -set -H - -USER_INPUT=$1 - -if [[ "${USER_INPUT}" == "" ]]; then - echo "false" - exit -fi - - -if [[ -d ${USER_INPUT} ]]; then - PATTERN="${USER_INPUT}/*" -else - PATTERN="${USER_INPUT}" -fi - -PERMISSION="" -if [[ "$2" != "" ]]; then - PERMISSION=$2 -fi - -FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) - -while read -r fileInfo; do - p=$(echo ${fileInfo} | cut -d' ' -f2) - - if [[ "${PERMISSION}" != "" ]]; then - if [[ "$p" != "${PERMISSION}" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then - echo "false" - exit - fi - fi -done <<< "${FILES_PERMISSIONS}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_permissions.sh '/node/etc/kubernetes/ssl/*key.pem' -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-https' is present OR '--kubelet-https' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.31 Ensure that encryption providers are appropriately configured (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit Script:** `check_encryption_provider_config.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to check the encrption provider config is set to aesbc -# -# outputs: -# true/false - -# TODO: Figure out the file location from the kube-apiserver commandline args -ENCRYPTION_CONFIG_FILE="/node/etc/kubernetes/ssl/encryption.yaml" - -if [[ ! -f "${ENCRYPTION_CONFIG_FILE}" ]]; then - echo "false" - exit -fi - -for provider in "$@" -do - if grep "$provider" "${ENCRYPTION_CONFIG_FILE}"; then - echo "true" - exit - fi -done - -echo "false" -exit - -``` - -**Audit Execution:** - -```bash -./check_encryption_provider_config.sh aescbc -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -- aescbc: true -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--terminated-pod-gc-threshold' is present -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -Cluster provisioned by RKE handles certificate rotation directly through RKE. - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is present OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5209 5190 0 18:53 ? 00:00:01 kube-scheduler --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is present OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 5209 5190 0 18:53 ? 00:00:01 kube-scheduler --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--cert-file' is present AND '--key-file' is present -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 2 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and set the below parameter. ---client-cert-auth="true" - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 4 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-26-105 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem ETCDCTL_ENDPOINTS=https://172.31.26.105:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/root -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--peer-cert-file' is present AND '--peer-key-file' is present -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 3 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and set the below parameter. ---peer-client-cert-auth=true - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--peer-client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 2 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-26-105 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem ETCDCTL_ENDPOINTS=https://172.31.26.105:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/root -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--trusted-ca-file' is present -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 2 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Automated) - - -**Result:** pass - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-policy-file' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:43 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. -All configuration is passed in as arguments at container run time. - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. -All configuration is passed in as arguments at container run time. - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive OR '/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml' is not present -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c %U:%G /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present OR '/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml' is not present -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /etc/kubernetes/ssl/kubecfg-kube-node.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/kubernetes/ssl/kubecfg-kube-node.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit:** - -```bash -stat -c permissions=%a /node/etc/kubernetes/ssl/kube-ca.pem -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit:** - -```bash -stat -c %U:%G /node/etc/kubernetes/ssl/kube-ca.pem -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /var/lib/kubelet/config.yaml - -Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. -All configuration is passed in as arguments at container run time. - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /var/lib/kubelet/config.yaml - -Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. -All configuration is passed in as arguments at container run time. - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--streaming-connection-idle-timeout' is not equal to '0' OR '--streaming-connection-idle-timeout' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -Clusters provisioned by RKE set the --hostname-override to avoid any hostname configuration errors - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--event-qps' is equal to '0' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -Clusters provisioned by RKE handles certificate rotation directly through RKE. - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Automated) - - -**Result:** pass - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -**Audit Script:** `check_for_default_sa.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) -if [[ ${count_sa} -gt 0 ]]; then - echo "false" - exit -fi - -for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") -do - for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[].kind=="ServiceAccount" and .subjects[].name=="default") or (.subjects[].kind=="Group" and .subjects[].name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') - do - read kind name <<<$(IFS=","; echo $result) - resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[] != "podsecuritypolicies")' | wc -l) - if [[ ${resource_count} -gt 0 ]]; then - echo "false" - exit - fi - done -done - - -echo "true" -``` - -**Audit Execution:** - -```bash -./check_for_default_sa.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): serviceaccounts is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "serviceaccounts" in API group "" at the cluster scope Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-fleet-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-impersonation-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cis-operator-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "default" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-node-lease" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-public" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "local" true -``` - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** warn - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) - - -**Result:** warn - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -**Audit Script:** `check_for_network_policies.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -for namespace in $(kubectl get namespaces --all-namespaces -o json | jq -r '.items[].metadata.name'); do - policy_count=$(kubectl get networkpolicy -n ${namespace} -o json | jq '.items | length') - if [[ ${policy_count} -eq 0 ]]; then - echo "false" - exit - fi -done - -echo "true" - -``` - -**Audit Execution:** - -```bash -./check_for_network_policies.sh -``` - -**Expected Result**: - -```console -'true' is present -``` - -**Returned Value**: - -```console -true -``` - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Automated) - - -**Result:** pass - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. - -**Audit Script:** `check_for_default_ns.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count=$(kubectl get all -n default -o json | jq .items[] | jq -r 'select((.metadata.name!="kubernetes"))' | jq .metadata.name | wc -l) -if [[ ${count} -gt 0 ]]; then - echo "false" - exit -fi - -echo "true" - - -``` - -**Audit Execution:** - -```bash -./check_for_default_ns.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): replicationcontrollers is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "replicationcontrollers" in API group "" in the namespace "default" Error from server (Forbidden): services is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "services" in API group "" in the namespace "default" Error from server (Forbidden): daemonsets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "daemonsets" in API group "apps" in the namespace "default" Error from server (Forbidden): deployments.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "deployments" in API group "apps" in the namespace "default" Error from server (Forbidden): replicasets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "replicasets" in API group "apps" in the namespace "default" Error from server (Forbidden): statefulsets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "statefulsets" in API group "apps" in the namespace "default" Error from server (Forbidden): horizontalpodautoscalers.autoscaling is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "horizontalpodautoscalers" in API group "autoscaling" in the namespace "default" Error from server (Forbidden): cronjobs.batch is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "cronjobs" in API group "batch" in the namespace "default" Error from server (Forbidden): jobs.batch is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "jobs" in API group "batch" in the namespace "default" true -``` - diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md b/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md new file mode 100644 index 00000000000..5f3c20fb37f --- /dev/null +++ b/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md @@ -0,0 +1,3047 @@ +--- +title: RKE Self-Assessment Guide - CIS Benchmark v1.24 - K8s v1.24 +--- + + + + + +This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.24 | Kubernetes v1.24 | + +This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.24. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +Rancher and RKE install Kubernetes services via Docker containers. Configuration is defined by arguments passed to the container at the time of initialization, not via configuration files. + +Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. +All configuration is passed in as arguments at container run time. + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. +All configuration is passed in as arguments at container run time. + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=644 +``` + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root root:root +``` + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit:** + +```bash +stat -c %a /node/var/lib/etcd +``` + +**Expected Result**: + +```console +'700' is equal to '700' +``` + +**Returned Value**: + +```console +700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** Not Applicable + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the master node. +For example, +chown -R root:root /etc/kubernetes/pki/ + +**Audit Script:** `check_files_owner_in_dir.sh` + +```bash +#!/usr/bin/env bash + +# This script is used to ensure the owner is set to root:root for +# the given directory and all the files in it +# +# inputs: +# $1 = /full/path/to/directory +# +# outputs: +# true/false + +INPUT_DIR=$1 + +if [[ "${INPUT_DIR}" == "" ]]; then + echo "false" + exit +fi + +if [[ $(stat -c %U:%G ${INPUT_DIR}) != "root:root" ]]; then + echo "false" + exit +fi + +statInfoLines=$(stat -c "%n %U:%G" ${INPUT_DIR}/*) +while read -r statInfoLine; do + f=$(echo ${statInfoLine} | cut -d' ' -f1) + p=$(echo ${statInfoLine} | cut -d' ' -f2) + + if [[ $(basename "$f" .pem) == "kube-etcd-"* ]]; then + if [[ "$p" != "root:root" && "$p" != "etcd:etcd" ]]; then + echo "false" + exit + fi + else + if [[ "$p" != "root:root" ]]; then + echo "false" + exit + fi + fi +done <<< "${statInfoLines}" + + +echo "true" +exit + +``` + +**Audit Execution:** + +```bash +./check_files_owner_in_dir.sh /node/etc/kubernetes/ssl +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +find /node/etc/kubernetes/ssl/ -name '*.pem' ! -name '*key.pem' -exec chmod -R 600 {} + + +**Audit:** + +```bash +find /node/etc/kubernetes/ssl/ -name '*.pem' ! -name '*key.pem' | xargs stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=644 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/ssl/*key.pem + +**Audit Script:** `check_files_permissions.sh` + +```bash +#!/usr/bin/env bash + +# This script is used to ensure the file permissions are set to 644 or +# more restrictive for all files in a given directory or a wildcard +# selection of files +# +# inputs: +# $1 = /full/path/to/directory or /path/to/fileswithpattern +# ex: !(*key).pem +# +# $2 (optional) = permission (ex: 600) +# +# outputs: +# true/false + +# Turn on "extended glob" for use of '!' in wildcard +shopt -s extglob + +# Turn off history to avoid surprises when using '!' +set -H + +USER_INPUT=$1 + +if [[ "${USER_INPUT}" == "" ]]; then + echo "false" + exit +fi + + +if [[ -d ${USER_INPUT} ]]; then + PATTERN="${USER_INPUT}/*" +else + PATTERN="${USER_INPUT}" +fi + +PERMISSION="" +if [[ "$2" != "" ]]; then + PERMISSION=$2 +fi + +FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) + +while read -r fileInfo; do + p=$(echo ${fileInfo} | cut -d' ' -f2) + + if [[ "${PERMISSION}" != "" ]]; then + if [[ "$p" != "${PERMISSION}" ]]; then + echo "false" + exit + fi + else + if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then + echo "false" + exit + fi + fi +done <<< "${FILES_PERMISSIONS}" + + +echo "true" +exit + +``` + +**Audit Execution:** + +```bash +./check_files_permissions.sh '/node/etc/kubernetes/ssl/*key.pem' +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --kubelet-https parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-https' is present OR '--kubelet-https' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-certificate-authority' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.18 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxsize' is greater or equal to 100 +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.31 Ensure that encryption providers are appropriately configured (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit Script:** `check_encryption_provider_config.sh` + +```bash +#!/usr/bin/env bash + +# This script is used to check the encrption provider config is set to aesbc +# +# outputs: +# true/false + +# TODO: Figure out the file location from the kube-apiserver commandline args +ENCRYPTION_CONFIG_FILE="/node/etc/kubernetes/ssl/encryption.yaml" + +if [[ ! -f "${ENCRYPTION_CONFIG_FILE}" ]]; then + echo "false" + exit +fi + +for provider in "$@" +do + if grep "$provider" "${ENCRYPTION_CONFIG_FILE}"; then + echo "true" + exit + fi +done + +echo "false" +exit + +``` + +**Audit Execution:** + +```bash +./check_encryption_provider_config.sh aescbc +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +- aescbc: true +``` + +### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true + +Cluster provisioned by RKE handles certificate rotation directly through RKE. + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 3859 3838 0 Sep11 ? 00:03:44 kube-scheduler --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 3859 3838 0 Sep11 ? 00:03:44 kube-scheduler --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--cert-file' is present AND '--key-file' is present +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:08 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 5 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and set the below parameter. +--client-cert-auth="true" + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:08 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 4 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-7-100 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem ETCDCTL_ENDPOINTS=https://127.0.0.1:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--peer-cert-file' is present AND '--peer-key-file' is present +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 2 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and set the below parameter. +--peer-client-cert-auth=true + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--peer-client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 2 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-7-100 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem ETCDCTL_ENDPOINTS=https://127.0.0.1:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--trusted-ca-file' is present +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 2 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Automated) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-policy-file' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:10 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. +All configuration is passed in as arguments at container run time. + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. +All configuration is passed in as arguments at container run time. + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit:** + +```bash +stat -c permissions=%a /node/etc/kubernetes/ssl/kube-ca.pem +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit:** + +```bash +stat -c %U:%G /node/etc/kubernetes/ssl/kube-ca.pem +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/kubelet/config.yaml + +Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. +All configuration is passed in as arguments at container run time. + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/kubelet/config.yaml + +Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. +All configuration is passed in as arguments at container run time. + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--streaming-connection-idle-timeout' is not equal to '0' OR '--streaming-connection-idle-timeout' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--protect-kernel-defaults=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--protect-kernel-defaults' is equal to 'true' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +Clusters provisioned by RKE set the --hostname-override to avoid any hostname configuration errors + +### 4.2.9 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--event-qps' is equal to '0' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--rotate-certificates' is present OR '--rotate-certificates' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +Clusters provisioned by RKE handles certificate rotation directly through RKE. + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Automated) + + +**Result:** pass + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +**Audit Script:** `check_for_default_sa.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) +if [[ ${count_sa} -gt 0 ]]; then + echo "false" + exit +fi + +for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") +do + for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[]?.kind=="ServiceAccount" and .subjects[]?.name=="default") or (.subjects[]?.kind=="Group" and .subjects[]?.name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') + do + read kind name <<<$(IFS=","; echo $result) + resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[]? != "podsecuritypolicies")' | wc -l) + if [[ ${resource_count} -gt 0 ]]; then + echo "false" + exit + fi + done +done + + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_default_sa.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" true +``` + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=1 +``` + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=1 +``` + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=1 +``` + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=1 +``` + +### 5.2.7 Minimize the admission of root containers (Manual) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +**Audit Script:** `check_for_network_policies.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +for namespace in $(kubectl get namespaces --all-namespaces -o json | jq -r '.items[].metadata.name'); do + policy_count=$(kubectl get networkpolicy -n ${namespace} -o json | jq '.items | length') + if [[ ${policy_count} -eq 0 ]]; then + echo "false" + exit + fi +done + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_network_policies.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Automated) + + +**Result:** pass + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + +**Audit Script:** `check_for_default_ns.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count=$(kubectl get all -n default -o json | jq .items[] | jq -r 'select((.metadata.name!="kubernetes"))' | jq .metadata.name | wc -l) +if [[ ${count} -gt 0 ]]; then + echo "false" + exit +fi + +echo "true" + + +``` + +**Audit Execution:** + +```bash +./check_for_default_ns.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md b/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md new file mode 100644 index 00000000000..9fe9ca2045f --- /dev/null +++ b/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md @@ -0,0 +1,2863 @@ +--- +title: RKE Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25/v1.26/v1.27 +--- + + + + + +This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25/v1.26/v1.27 | + +This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +Rancher and RKE install Kubernetes services via Docker containers. Configuration is defined by arguments passed to the container at the time of initialization, not via configuration files. + +Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-apiserver.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-controller-manager.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-scheduler.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /etc/kubernetes/manifests/etcd.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /etc/kubernetes/manifests/etcd.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +**Audit:** + +```bash +ps -ef | grep kubelet | grep -- --cni-conf-dir | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +**Audit:** + +```bash +ps -ef | grep kubelet | grep -- --cni-conf-dir | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit:** + +```bash +stat -c %a /node/var/lib/etcd +``` + +**Expected Result**: + +```console +'700' is equal to '700' +``` + +**Returned Value**: + +```console +700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +**Audit:** + +```bash +stat -c %U:%G /node/var/lib/etcd +``` + +**Expected Result**: + +```console +'etcd:etcd' is present +``` + +**Returned Value**: + +```console +etcd:etcd +``` + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/admin.conf +Not Applicable - Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf +Not Applicable - Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 scheduler +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root scheduler +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 controllermanager +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root controllermanager +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /etc/kubernetes/pki/ + +**Audit Script:** `check_files_owner_in_dir.sh` + +```bash +#!/usr/bin/env bash + +# This script is used to ensure the owner is set to root:root for +# the given directory and all the files in it +# +# inputs: +# $1 = /full/path/to/directory +# +# outputs: +# true/false + +INPUT_DIR=$1 + +if [[ "${INPUT_DIR}" == "" ]]; then + echo "false" + exit +fi + +if [[ $(stat -c %U:%G ${INPUT_DIR}) != "root:root" ]]; then + echo "false" + exit +fi + +statInfoLines=$(stat -c "%n %U:%G" ${INPUT_DIR}/*) +while read -r statInfoLine; do + f=$(echo ${statInfoLine} | cut -d' ' -f1) + p=$(echo ${statInfoLine} | cut -d' ' -f2) + + if [[ $(basename "$f" .pem) == "kube-etcd-"* ]]; then + if [[ "$p" != "root:root" && "$p" != "etcd:etcd" ]]; then + echo "false" + exit + fi + else + if [[ "$p" != "root:root" ]]; then + echo "false" + exit + fi + fi +done <<< "${statInfoLines}" + + +echo "true" +exit + +``` + +**Audit Execution:** + +```bash +./check_files_owner_in_dir.sh /node/etc/kubernetes/ssl +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +find /node/etc/kubernetes/ssl/ -name '*.pem' ! -name '*key.pem' -exec chmod -R 600 {} + + +**Audit:** + +```bash +find /node/etc/kubernetes/ssl/ -name '*.pem' ! -name '*key.pem' | xargs stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=644 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +find /node/etc/kubernetes/ssl/ -name '*key.pem' -exec chmod -R 600 {} + + +**Audit:** + +```bash +find /node/etc/kubernetes/ssl/ -name '*key.pem' | xargs stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.4 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.5 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= +When generating serving certificates, functionality could break in conjunction with hostname overrides which are required for certain cloud providers. + +### 1.2.6 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.7 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.9 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.10 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.12 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.13 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.14 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.15 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.16 Ensure that the --secure-port argument is not set to 0 - NoteThis recommendation is obsolete and will be deleted per the consensus process (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.17 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.18 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.19 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.20 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.21 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxsize' is greater or equal to 100 +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.22 Ensure that the --request-timeout argument is set as appropriate (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameter as appropriate and if needed. +For example, --request-timeout=300s + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +### 1.2.23 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.24 Ensure that the --service-account-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.25 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.26 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.27 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.28 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.29 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.30 Ensure that encryption providers are appropriately configured (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit:** + +```bash +ENCRYPTION_PROVIDER_CONFIG=$(ps -ef | grep kube-apiserver | grep -- --encryption-provider-config | sed 's%.*encryption-provider-config[= ]\([^ ]*\).*%\1%') if test -e $ENCRYPTION_PROVIDER_CONFIG; then grep -A1 'providers:' $ENCRYPTION_PROVIDER_CONFIG | tail -n1 | grep -o "[A-Za-z]*" | sed 's/^/provider=/'; fi +``` + +**Expected Result**: + +```console +'provider' is present +``` + +### 1.2.31 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true +Cluster provisioned by RKE handles certificate rotation directly through RKE. + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 4339 4318 0 Sep11 ? 00:03:28 kube-scheduler --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --profiling=false --v=2 --leader-elect=true +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 4339 4318 0 Sep11 ? 00:03:28 kube-scheduler --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --profiling=false --v=2 --leader-elect=true +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--cert-file' is present AND '--key-file' is present +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 2 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and set the below parameter. +--client-cert-auth="true" + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 1 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-4-224 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem ETCDCTL_ENDPOINTS=https://127.0.0.1:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--peer-cert-file' is present AND '--peer-key-file' is present +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 2 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and set the below parameter. +--peer-client-cert-auth=true + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--peer-client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 1 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-4-224 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem ETCDCTL_ENDPOINTS=https://127.0.0.1:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--trusted-ca-file' is present +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 1 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +### 3.1.2 Service account token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of service account tokens. + +### 3.1.3 Bootstrap token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of bootstrap tokens. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Automated) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-policy-file' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable - Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. +All configuration is passed in as arguments at container run time. + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable - Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. + All configuration is passed in as arguments at container run time. + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit:** + +```bash +stat -c permissions=%a /node/etc/kubernetes/ssl/kube-ca.pem +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit:** + +```bash +stat -c %U:%G /node/etc/kubernetes/ssl/kube-ca.pem +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/kubelet/config.yaml +Not Applicable - Clusters provisioned by RKE do not require or maintain a configuration file for the kubelet. +All configuration is passed in as arguments at container run time. + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/kubelet/config.yaml +Not Applicable - Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. +All configuration is passed in as arguments at container run time. + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--streaming-connection-idle-timeout' is not equal to '0' OR '--streaming-connection-idle-timeout' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.6 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.7 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable - Clusters provisioned by RKE set the --hostname-override to avoid any hostname configuration errors + +### 4.2.8 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--event-qps' is greater or equal to 0 OR '--event-qps' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.9 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.10 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--rotate-certificates' is present OR '--rotate-certificates' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.11 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable - Clusters provisioned by RKE handles certificate rotation directly through RKE. + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +### 4.2.12 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.13 Ensure that a limit is set on pod PIDs (Manual) + + +**Result:** warn + +**Remediation:** +Decide on an appropriate level for this parameter and set it, +either via the --pod-max-pids command line parameter or the PodPidsLimit configuration file setting. + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--pod-max-pids' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Manual) + + +**Result:** pass + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +**Audit Script:** `check_for_default_sa.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) +if [[ ${count_sa} -gt 0 ]]; then + echo "false" + exit +fi + +for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") +do + for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[]?.kind=="ServiceAccount" and .subjects[]?.name=="default") or (.subjects[]?.kind=="Group" and .subjects[]?.name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') + do + read kind name <<<$(IFS=","; echo $result) + resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[]? != "podsecuritypolicies")' | wc -l) + if [[ ${resource_count} -gt 0 ]]; then + echo "false" + exit + fi + done +done + + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_default_sa.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +### 5.1.9 Minimize access to create persistent volumes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to PersistentVolume objects in the cluster. + +### 5.1.10 Minimize access to the proxy sub-resource of nodes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the proxy sub-resource of node objects. + +### 5.1.11 Minimize access to the approval sub-resource of certificatesigningrequests objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the approval sub-resource of certificatesigningrequest objects. + +### 5.1.12 Minimize access to webhook configuration objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the validatingwebhookconfigurations or mutatingwebhookconfigurations objects + +### 5.1.13 Minimize access to the service account token creation (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the token sub-resource of serviceaccount objects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +### 5.2.7 Minimize the admission of root containers (Manual) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md b/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md deleted file mode 100644 index 084568cc402..00000000000 --- a/docs/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md +++ /dev/null @@ -1,3085 +0,0 @@ ---- -title: RKE Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25 ---- - -This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25 | - -This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -Rancher and RKE install Kubernetes services via Docker containers. Configuration is defined by arguments passed to the container at the time of initialization, not via configuration files. - -Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Control Plane Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. -All configuration is passed in as arguments at container run time. - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. -All configuration is passed in as arguments at container run time. - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. -All configuration is passed in as arguments at container run time. - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. -All configuration is passed in as arguments at container run time. - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 permissions=600 -``` - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root -``` - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit:** - -```bash -stat -c %a /node/var/lib/etcd -``` - -**Expected Result**: - -```console -'700' is equal to '700' -``` - -**Returned Value**: - -```console -700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** Not Applicable - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the master node. -For example, -chown -R root:root /etc/kubernetes/pki/ - -**Audit Script:** `check_files_owner_in_dir.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the owner is set to root:root for -# the given directory and all the files in it -# -# inputs: -# $1 = /full/path/to/directory -# -# outputs: -# true/false - -INPUT_DIR=$1 - -if [[ "${INPUT_DIR}" == "" ]]; then - echo "false" - exit -fi - -if [[ $(stat -c %U:%G ${INPUT_DIR}) != "root:root" ]]; then - echo "false" - exit -fi - -statInfoLines=$(stat -c "%n %U:%G" ${INPUT_DIR}/*) -while read -r statInfoLine; do - f=$(echo ${statInfoLine} | cut -d' ' -f1) - p=$(echo ${statInfoLine} | cut -d' ' -f2) - - if [[ $(basename "$f" .pem) == "kube-etcd-"* ]]; then - if [[ "$p" != "root:root" && "$p" != "etcd:etcd" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "root:root" ]]; then - echo "false" - exit - fi - fi -done <<< "${statInfoLines}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_owner_in_dir.sh /node/etc/kubernetes/ssl -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the master node. -For example, -chmod -R 644 /etc/kubernetes/pki/*.crt - -**Audit Script:** `check_files_permissions.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the file permissions are set to 644 or -# more restrictive for all files in a given directory or a wildcard -# selection of files -# -# inputs: -# $1 = /full/path/to/directory or /path/to/fileswithpattern -# ex: !(*key).pem -# -# $2 (optional) = permission (ex: 600) -# -# outputs: -# true/false - -# Turn on "extended glob" for use of '!' in wildcard -shopt -s extglob - -# Turn off history to avoid surprises when using '!' -set -H - -USER_INPUT=$1 - -if [[ "${USER_INPUT}" == "" ]]; then - echo "false" - exit -fi - - -if [[ -d ${USER_INPUT} ]]; then - PATTERN="${USER_INPUT}/*" -else - PATTERN="${USER_INPUT}" -fi - -PERMISSION="" -if [[ "$2" != "" ]]; then - PERMISSION=$2 -fi - -FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) - -while read -r fileInfo; do - p=$(echo ${fileInfo} | cut -d' ' -f2) - - if [[ "${PERMISSION}" != "" ]]; then - if [[ "$p" != "${PERMISSION}" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then - echo "false" - exit - fi - fi -done <<< "${FILES_PERMISSIONS}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_permissions.sh '/node/etc/kubernetes/ssl/!(*key).pem' -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /etc/kubernetes/ssl/*key.pem - -**Audit Script:** `check_files_permissions.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the file permissions are set to 644 or -# more restrictive for all files in a given directory or a wildcard -# selection of files -# -# inputs: -# $1 = /full/path/to/directory or /path/to/fileswithpattern -# ex: !(*key).pem -# -# $2 (optional) = permission (ex: 600) -# -# outputs: -# true/false - -# Turn on "extended glob" for use of '!' in wildcard -shopt -s extglob - -# Turn off history to avoid surprises when using '!' -set -H - -USER_INPUT=$1 - -if [[ "${USER_INPUT}" == "" ]]; then - echo "false" - exit -fi - - -if [[ -d ${USER_INPUT} ]]; then - PATTERN="${USER_INPUT}/*" -else - PATTERN="${USER_INPUT}" -fi - -PERMISSION="" -if [[ "$2" != "" ]]; then - PERMISSION=$2 -fi - -FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) - -while read -r fileInfo; do - p=$(echo ${fileInfo} | cut -d' ' -f2) - - if [[ "${PERMISSION}" != "" ]]; then - if [[ "$p" != "${PERMISSION}" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then - echo "false" - exit - fi - fi -done <<< "${FILES_PERMISSIONS}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_permissions.sh '/node/etc/kubernetes/ssl/*key.pem' -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-https' is present OR '--kubelet-https' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.31 Ensure that encryption providers are appropriately configured (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit Script:** `check_encryption_provider_config.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to check the encrption provider config is set to aesbc -# -# outputs: -# true/false - -# TODO: Figure out the file location from the kube-apiserver commandline args -ENCRYPTION_CONFIG_FILE="/node/etc/kubernetes/ssl/encryption.yaml" - -if [[ ! -f "${ENCRYPTION_CONFIG_FILE}" ]]; then - echo "false" - exit -fi - -for provider in "$@" -do - if grep "$provider" "${ENCRYPTION_CONFIG_FILE}"; then - echo "true" - exit - fi -done - -echo "false" -exit - -``` - -**Audit Execution:** - -```bash -./check_encryption_provider_config.sh aescbc -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -- aescbc: true -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--terminated-pod-gc-threshold' is present -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -Cluster provisioned by RKE handles certificate rotation directly through RKE. - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is present OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5671 5649 0 22:01 ? 00:00:01 kube-scheduler --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is present OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 5671 5649 0 22:01 ? 00:00:01 kube-scheduler --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--cert-file' is present AND '--key-file' is present -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 5 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and set the below parameter. ---client-cert-auth="true" - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 4 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-51 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem ETCDCTL_ENDPOINTS=https://172.31.31.51:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--peer-cert-file' is present AND '--peer-key-file' is present -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 2 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and set the below parameter. ---peer-client-cert-auth=true - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--peer-client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 3 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-51 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem ETCDCTL_ENDPOINTS=https://172.31.31.51:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--trusted-ca-file' is present -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 2 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Automated) - - -**Result:** pass - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-policy-file' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:34 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. -All configuration is passed in as arguments at container run time. - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. -All configuration is passed in as arguments at container run time. - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive OR '/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml' is not present -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c %U:%G /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present OR '/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml' is not present -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /etc/kubernetes/ssl/kubecfg-kube-node.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/kubernetes/ssl/kubecfg-kube-node.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit:** - -```bash -stat -c permissions=%a /node/etc/kubernetes/ssl/kube-ca.pem -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit:** - -```bash -stat -c %U:%G /node/etc/kubernetes/ssl/kube-ca.pem -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /var/lib/kubelet/config.yaml - -Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. -All configuration is passed in as arguments at container run time. - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /var/lib/kubelet/config.yaml - -Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. -All configuration is passed in as arguments at container run time. - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--streaming-connection-idle-timeout' is not equal to '0' OR '--streaming-connection-idle-timeout' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -Clusters provisioned by RKE set the --hostname-override to avoid any hostname configuration errors - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--event-qps' is equal to '0' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -Clusters provisioned by RKE handles certificate rotation directly through RKE. - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Automated) - - -**Result:** pass - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -**Audit Script:** `check_for_default_sa.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) -if [[ ${count_sa} -gt 0 ]]; then - echo "false" - exit -fi - -for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") -do - for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[].kind=="ServiceAccount" and .subjects[].name=="default") or (.subjects[].kind=="Group" and .subjects[].name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') - do - read kind name <<<$(IFS=","; echo $result) - resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[] != "podsecuritypolicies")' | wc -l) - if [[ ${resource_count} -gt 0 ]]; then - echo "false" - exit - fi - done -done - - -echo "true" -``` - -**Audit Execution:** - -```bash -./check_for_default_sa.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): serviceaccounts is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "serviceaccounts" in API group "" at the cluster scope Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-fleet-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-impersonation-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cis-operator-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "default" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-node-lease" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-public" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "local" true -``` - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** warn - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) - - -**Result:** warn - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -**Audit Script:** `check_for_network_policies.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -for namespace in $(kubectl get namespaces --all-namespaces -o json | jq -r '.items[].metadata.name'); do - policy_count=$(kubectl get networkpolicy -n ${namespace} -o json | jq '.items | length') - if [[ ${policy_count} -eq 0 ]]; then - echo "false" - exit - fi -done - -echo "true" - -``` - -**Audit Execution:** - -```bash -./check_for_network_policies.sh -``` - -**Expected Result**: - -```console -'true' is present -``` - -**Returned Value**: - -```console -true -``` - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Automated) - - -**Result:** pass - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. - -**Audit Script:** `check_for_default_ns.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count=$(kubectl get all -n default -o json | jq .items[] | jq -r 'select((.metadata.name!="kubernetes"))' | jq .metadata.name | wc -l) -if [[ ${count} -gt 0 ]]; then - echo "false" - exit -fi - -echo "true" - - -``` - -**Audit Execution:** - -```bash -./check_for_default_ns.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): replicationcontrollers is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "replicationcontrollers" in API group "" in the namespace "default" Error from server (Forbidden): services is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "services" in API group "" in the namespace "default" Error from server (Forbidden): daemonsets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "daemonsets" in API group "apps" in the namespace "default" Error from server (Forbidden): deployments.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "deployments" in API group "apps" in the namespace "default" Error from server (Forbidden): replicasets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "replicasets" in API group "apps" in the namespace "default" Error from server (Forbidden): statefulsets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "statefulsets" in API group "apps" in the namespace "default" Error from server (Forbidden): horizontalpodautoscalers.autoscaling is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "horizontalpodautoscalers" in API group "autoscaling" in the namespace "default" Error from server (Forbidden): cronjobs.batch is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "cronjobs" in API group "batch" in the namespace "default" Error from server (Forbidden): jobs.batch is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "jobs" in API group "batch" in the namespace "default" true -``` - diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md b/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md index 83cac7d6e59..3099612cacb 100644 --- a/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md +++ b/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md @@ -2,6 +2,10 @@ title: RKE2 Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.23 --- + + + + This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md b/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md deleted file mode 100644 index ffb7755d7ad..00000000000 --- a/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md +++ /dev/null @@ -1,3196 +0,0 @@ ---- -title: RKE2 Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.24 ---- - -This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.23 | Kubernetes v1.24 | - -This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE2 install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.23. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -RKE2 launches control plane components as static pods, managed by the kubelet, and uses containerd as the container runtime. Configuration is defined by arguments passed to the container at the time of initialization or via configuration file. - -Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE2 nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Master Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the -control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %a /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -644 -``` - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' -``` - -**Expected Result**: - -```console -'permissions' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 permissions=644 -``` - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root -``` - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/db/etcd -``` - -**Expected Result**: - -```console -permissions has permissions 700, expected 700 or more restrictive -``` - -**Returned Value**: - -```console -permissions=700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/db/etcd -``` - -**Expected Result**: - -```console -'etcd:etcd' is present -``` - -**Returned Value**: - -```console -etcd:etcd -``` - -### 1.1.13 Ensure that the admin.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 600 /etc/kubernetes/admin.conf - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/admin.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/admin.conf - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/admin.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 scheduler - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root scheduler - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 controllermanager - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/controller.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /var/lib/rancher/rke2/server/cred/controller.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/controller.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown -R root:root /var/lib/rancher/rke2/server/tls/ - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/tls -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 644 /var/lib/rancher/rke2/server/tls/*.crt - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.crt -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /var/lib/rancher/rke2/server/tls/*.key - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.key -``` - -**Expected Result**: - -```console -'permissions' is equal to '600' -``` - -**Returned Value**: - -```console -permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-https' is present OR '--kubelet-https' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'AlwaysPullImages' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -### 1.2.33 Ensure that encryption providers are appropriately configured (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit:** - -```bash -/bin/sh -c 'if grep aescbc /var/lib/rancher/rke2/server/cred/encryption-config.json; then echo 0; fi' -``` - -**Expected Result**: - -```console -'0' is present -``` - -**Returned Value**: - -```console -{"kind":"EncryptionConfiguration","apiVersion":"apiserver.config.k8s.io/v1","resources":[{"resources":["secrets"],"providers":[{"aescbc":{"keys":[{"name":"aescbckey","secret":"LdLeqCPN/HfmgnUBXVPkDtUfeOPHwcQzDiLYG3nzFI4="}]}},{"identity":{}}]}]} 0 -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--terminated-pod-gc-threshold' is present -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3652 3523 0 23:45 ? 00:00:03 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 3652 3523 0 23:45 ? 00:00:03 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and set the below parameter. ---client-cert-auth="true" - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-102 ETCD_UNSUPPORTED_ARCH= FILE_HASH=755e8914c854015cfb808b8456f808644387876672add1f9e19564c58f754595 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=78088791fd2612fad13ce760ef91a0ee HOME=/ -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and set the below parameter. ---peer-client-cert-auth=true - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-102 ETCD_UNSUPPORTED_ARCH= FILE_HASH=755e8914c854015cfb808b8456f808644387876672add1f9e19564c58f754595 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=78088791fd2612fad13ce760ef91a0ee HOME=/ -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Audit Config:** - -```bash -cat /var/lib/rancher/rke2/server/db/etcd/config -``` - -**Expected Result**: - -```console -'ETCD_TRUSTED_CA_FILE' is present OR '{.peer-transport-security.trusted-ca-file}' is equal to '/var/lib/rancher/rke2/server/tls/etcd/peer-ca.crt' -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-102 ETCD_UNSUPPORTED_ARCH= FILE_HASH=755e8914c854015cfb808b8456f808644387876672add1f9e19564c58f754595 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=78088791fd2612fad13ce760ef91a0ee HOME=/ -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Automated) - - -**Result:** pass - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep | grep -o audit-policy-file -``` - -**Expected Result**: - -```console -'audit-policy-file' is equal to 'audit-policy-file' -``` - -**Returned Value**: - -```console -audit-policy-file -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chmod 644 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive OR '/var/lib/rancher/rke2/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is present OR '/var/lib/rancher/rke2/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/kubelet.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit Script:** `check_cafile_permissions.sh` - -```bash -#!/usr/bin/env bash - -CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') -CAFILE=/node$CAFILE -if test -z $CAFILE; then CAFILE=$kubeletcafile; fi -if test -e $CAFILE; then stat -c permissions=%a $CAFILE; fi - -``` - -**Audit Execution:** - -```bash -./check_cafile_permissions.sh -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit Script:** `check_cafile_ownership.sh` - -```bash -#!/usr/bin/env bash - -CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') -CAFILE=/node$CAFILE -if test -z $CAFILE; then CAFILE=$kubeletcafile; fi -if test -e $CAFILE; then stat -c %U:%G $CAFILE; fi - -``` - -**Audit Execution:** - -```bash -./check_cafile_ownership.sh -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /etc/rancher/rke2/rke2.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/rancher/rke2/rke2.yaml; then stat -c permissions=%a /etc/rancher/rke2/rke2.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /etc/rancher/rke2/rke2.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/rancher/rke2/rke2.yaml; then stat -c %U:%G /etc/rancher/rke2/rke2.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.streamingConnectionIdleTimeout}' is present OR '{.streamingConnectionIdleTimeout}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.makeIPTablesUtilChains}' is present OR '{.makeIPTablesUtilChains}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.eventRecordQPS}' is present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUJlRENDQVIrZ0F3SUJBZ0lCQURBS0JnZ3Foa2pPUFFRREFqQWtNU0l3SUFZRFZRUUREQmx5YTJVeUxYTmwKY25abGNpMWpZVUF4TmpjM05EVTFNRE0zTUI0WERUSXpNREl5TmpJek5ETTFOMW9YRFRNek1ESXlNekl6TkRNMQpOMW93SkRFaU1DQUdBMVVFQXd3WmNtdGxNaTF6WlhKMlpYSXRZMkZBTVRZM056UTFOVEF6TnpCWk1CTUdCeXFHClNNNDlBZ0VHQ0NxR1NNNDlBd0VIQTBJQUJIZXg2aVo0Q09SYmlTd1pyYmRHa2ZIaHNKb2RZaGRScDFjNklkMngKS05ITHZzZEdxeEc0V2xySVp6WTEwTDlLWDJCVk9Senp0RUZ4cDc3MTlFTnVnNDZqUWpCQU1BNEdBMVVkRHdFQgovd1FFQXdJQ3BEQVBCZ05WSFJNQkFmOEVCVEFEQVFIL01CMEdBMVVkRGdRV0JCU1pFWGkwbDNsS3dXS1U3S0x6CkgwZG5aTzVEOWpBS0JnZ3Foa2pPUFFRREFnTkhBREJFQWlCK2NQUUhLdXBJc05zU3BLVEg2NHJibFpKYTIyZ0oKdlh4TmNxb0dQSEdhUlFJZ1JJdU1hcFVKOHVyVEdxblZGckFldy81aFdOZFdRUjNyN3FXQmlrYnk0aEk9Ci0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0K server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) - - -**Result:** pass - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.featureGates.RotateKubeletServerCertificate}' is present OR '{.featureGates.RotateKubeletServerCertificate}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUJlRENDQVIrZ0F3SUJBZ0lCQURBS0JnZ3Foa2pPUFFRREFqQWtNU0l3SUFZRFZRUUREQmx5YTJVeUxYTmwKY25abGNpMWpZVUF4TmpjM05EVTFNRE0zTUI0WERUSXpNREl5TmpJek5ETTFOMW9YRFRNek1ESXlNekl6TkRNMQpOMW93SkRFaU1DQUdBMVVFQXd3WmNtdGxNaTF6WlhKMlpYSXRZMkZBTVRZM056UTFOVEF6TnpCWk1CTUdCeXFHClNNNDlBZ0VHQ0NxR1NNNDlBd0VIQTBJQUJIZXg2aVo0Q09SYmlTd1pyYmRHa2ZIaHNKb2RZaGRScDFjNklkMngKS05ITHZzZEdxeEc0V2xySVp6WTEwTDlLWDJCVk9Senp0RUZ4cDc3MTlFTnVnNDZqUWpCQU1BNEdBMVVkRHdFQgovd1FFQXdJQ3BEQVBCZ05WSFJNQkFmOEVCVEFEQVFIL01CMEdBMVVkRGdRV0JCU1pFWGkwbDNsS3dXS1U3S0x6CkgwZG5aTzVEOWpBS0JnZ3Foa2pPUFFRREFnTkhBREJFQWlCK2NQUUhLdXBJc05zU3BLVEg2NHJibFpKYTIyZ0oKdlh4TmNxb0dQSEdhUlFJZ1JJdU1hcFVKOHVyVEdxblZGckFldy81aFdOZFdRUjNyN3FXQmlrYnk0aEk9Ci0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0K server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{range .tlsCipherSuites[:]}{}{','}{end}' is present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Automated) - - -**Result:** pass - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -**Audit Script:** `check_for_default_sa.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) -if [[ ${count_sa} -gt 0 ]]; then - echo "false" - exit -fi - -for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") -do - for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[].kind=="ServiceAccount" and .subjects[].name=="default") or (.subjects[].kind=="Group" and .subjects[].name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') - do - read kind name <<<$(IFS=","; echo $result) - resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[] != "podsecuritypolicies")' | wc -l) - if [[ ${resource_count} -gt 0 ]]; then - echo "false" - exit - fi - done -done - - -echo "true" -``` - -**Audit Execution:** - -```bash -./check_for_default_sa.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): serviceaccounts is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "serviceaccounts" in API group "" at the cluster scope Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "calico-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-fleet-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-impersonation-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cis-operator-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "default" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-node-lease" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-public" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "local" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "tigera-operator" true -``` - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -**Audit:** - -```bash -kubectl get psp global-restricted-psp -o json | jq -r '.spec.runAsUser.rule' -``` - -**Expected Result**: - -```console -'MustRunAsNonRoot' is present -``` - -**Returned Value**: - -```console -MustRunAsNonRoot -``` - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=5 -``` - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=5 -``` - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=2 -``` - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=4 -``` - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** pass - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=4 -``` - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -**Audit:** - -```bash -kubectl get psp global-restricted-psp -o json | jq -r .spec.requiredDropCapabilities[] -``` - -**Expected Result**: - -```console -'ALL' is present -``` - -**Returned Value**: - -```console -ALL -``` - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports Network Policies (Automated) - - -**Result:** pass - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -**Audit:** - -```bash -kubectl get pods --all-namespaces --selector='k8s-app in (calico-node, canal, cilium)' -o name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -**Audit Script:** `check_for_rke2_network_policies.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -for namespace in kube-system kube-public default; do - policy_count=$(/var/lib/rancher/rke2/bin/kubectl get networkpolicy -n ${namespace} -o json | jq -r '.items | length') - if [ ${policy_count} -eq 0 ]; then - echo "false" - exit - fi -done - -echo "true" - -``` - -**Audit Execution:** - -```bash -./check_for_rke2_network_policies.sh -``` - -**Expected Result**: - -```console -'true' is present -``` - -**Returned Value**: - -```console -true -``` - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md b/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md new file mode 100644 index 00000000000..ba80c0a516a --- /dev/null +++ b/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md @@ -0,0 +1,3202 @@ +--- +title: RKE2 Self-Assessment Guide - CIS Benchmark v1.24 - K8s v1.24 +--- + + + + + +This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.24 | Kubernetes v1.24 | + +This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE2 install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.24. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +RKE2 launches control plane components as static pods, managed by the kubelet, and uses containerd as the container runtime. Configuration is defined by arguments passed to the container at the time of initialization or via configuration file. + +Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE2 nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 644 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %a /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' +``` + +**Expected Result**: + +```console +'600' is present +``` + +**Returned Value**: + +```console +644 +``` + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' +``` + +**Expected Result**: + +```console +'permissions' is equal to '600' +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' +``` + +**Expected Result**: + +```console +'644' is equal to '644' +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=644 +``` + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root root:root +``` + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/db/etcd +``` + +**Expected Result**: + +```console +permissions has permissions 700, expected 700 or more restrictive +``` + +**Returned Value**: + +```console +permissions=700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/db/etcd +``` + +**Expected Result**: + +```console +'etcd:etcd' is present +``` + +**Returned Value**: + +```console +etcd:etcd +``` + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/admin.conf + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/cred/admin.kubeconfig +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/admin.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 scheduler + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root scheduler + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 controllermanager + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/cred/controller.kubeconfig +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/server/cred/controller.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/controller.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /var/lib/rancher/rke2/server/tls/ + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/tls +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Automated) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 644 /var/lib/rancher/rke2/server/tls/*.crt + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.crt +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /var/lib/rancher/rke2/server/tls/*.key + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.key +``` + +**Expected Result**: + +```console +'permissions' is equal to '600' +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the --kubelet-https parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-https' is present OR '--kubelet-https' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-certificate-authority' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.18 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxsize' is greater or equal to 100 +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true root 1017917 2489 83 16:16 ? 00:00:00 kubectl get --server=https://localhost:6443/ --client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --raw=/readyz root 1017945 2489 75 16:16 ? 00:00:00 kubectl get --server=https://localhost:6443/ --client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --raw=/livez +``` + +### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +### 1.2.33 Ensure that encryption providers are appropriately configured (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit:** + +```bash +/bin/sh -c 'if grep aescbc /var/lib/rancher/rke2/server/cred/encryption-config.json; then echo 0; fi' +``` + +**Expected Result**: + +```console +'0' is present +``` + +**Returned Value**: + +```console +{"kind":"EncryptionConfiguration","apiVersion":"apiserver.config.k8s.io/v1","resources":[{"resources":["secrets"],"providers":[{"aescbc":{"keys":[{"name":"aescbckey","secret":"akmMjUAq94YvsUftJpiA3b+9SClu0ESPBeckAI7KZBY="}]}},{"identity":{}}]}]} 0 +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2707 2593 0 Sep11 ? 00:06:20 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 2707 2593 0 Sep11 ? 00:06:20 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and set the below parameter. +--client-cert-auth="true" + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-10-113 ETCD_UNSUPPORTED_ARCH= NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=560b915d9afb672c20c2c1e8664bdf8f FILE_HASH=166aebdce42ff62fcdd2cefc9e7ed8f7c5b562d219ca6afec8f73adc654f65e7 HOME=/ +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and set the below parameter. +--peer-client-cert-auth=true + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-10-113 ETCD_UNSUPPORTED_ARCH= NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=560b915d9afb672c20c2c1e8664bdf8f FILE_HASH=166aebdce42ff62fcdd2cefc9e7ed8f7c5b562d219ca6afec8f73adc654f65e7 HOME=/ +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Audit Config:** + +```bash +cat /var/lib/rancher/rke2/server/db/etcd/config +``` + +**Expected Result**: + +```console +'ETCD_TRUSTED_CA_FILE' is present OR '{.peer-transport-security.trusted-ca-file}' is equal to '/var/lib/rancher/rke2/server/tls/etcd/peer-ca.crt' +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-10-113 ETCD_UNSUPPORTED_ARCH= NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=560b915d9afb672c20c2c1e8664bdf8f FILE_HASH=166aebdce42ff62fcdd2cefc9e7ed8f7c5b562d219ca6afec8f73adc654f65e7 HOME=/ +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Automated) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep | grep -o audit-policy-file +``` + +**Expected Result**: + +```console +'audit-policy-file' is equal to 'audit-policy-file' +``` + +**Returned Value**: + +```console +audit-policy-file +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'600' is present +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit Script:** `check_cafile_permissions.sh` + +```bash +#!/usr/bin/env bash + +CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') +CAFILE=/node$CAFILE +if test -z $CAFILE; then CAFILE=$kubeletcafile; fi +if test -e $CAFILE; then stat -c permissions=%a $CAFILE; fi + +``` + +**Audit Execution:** + +```bash +./check_cafile_permissions.sh +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit Script:** `check_cafile_ownership.sh` + +```bash +#!/usr/bin/env bash + +CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') +CAFILE=/node$CAFILE +if test -z $CAFILE; then CAFILE=$kubeletcafile; fi +if test -e $CAFILE; then stat -c %U:%G $CAFILE; fi + +``` + +**Audit Execution:** + +```bash +./check_cafile_ownership.sh +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.streamingConnectionIdleTimeout}' is present OR '{.streamingConnectionIdleTimeout}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--protect-kernel-defaults=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--protect-kernel-defaults' is equal to 'true' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.makeIPTablesUtilChains}' is present OR '{.makeIPTablesUtilChains}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +### 4.2.9 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Automated) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.eventRecordQPS}' is present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** pass + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.featureGates.RotateKubeletServerCertificate}' is present OR '{.featureGates.RotateKubeletServerCertificate}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{range .tlsCipherSuites[:]}{}{','}{end}' is present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Automated) + + +**Result:** pass + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +**Audit Script:** `check_for_default_sa.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) +if [[ ${count_sa} -gt 0 ]]; then + echo "false" + exit +fi + +for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") +do + for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[]?.kind=="ServiceAccount" and .subjects[]?.name=="default") or (.subjects[]?.kind=="Group" and .subjects[]?.name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') + do + read kind name <<<$(IFS=","; echo $result) + resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[]? != "podsecuritypolicies")' | wc -l) + if [[ ${resource_count} -gt 0 ]]; then + echo "false" + exit + fi + done +done + + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_default_sa.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +**Audit:** + +```bash +kubectl get psp global-restricted-psp && kubectl get psp global-restricted-psp -o json | jq -r ".spec.runAsUser.rule" || kubectl get psp restricted-noroot-psp && kubectl get psp restricted-noroot-psp -o json | jq -r ".spec.runAsUser.rule" +``` + +**Expected Result**: + +```console +'MustRunAsNonRoot' is equal to 'MustRunAsNonRoot' +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ Error from server (NotFound): podsecuritypolicies.policy "global-restricted-psp" not found Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ NAME PRIV CAPS SELINUX RUNASUSER FSGROUP SUPGROUP READONLYROOTFS VOLUMES restricted-noroot-psp false RunAsAny MustRunAsNonRoot MustRunAs MustRunAs false configMap,emptyDir,projected,secret,downwardAPI,csi,persistentVolumeClaim Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ MustRunAsNonRoot +``` + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=5 +``` + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=5 +``` + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=2 +``` + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=4 +``` + +### 5.2.7 Minimize the admission of root containers (Automated) + + +**Result:** pass + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=4 +``` + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +**Audit:** + +```bash +kubectl get psp global-restricted-psp && kubectl get psp global-restricted-psp -o json | jq -r .spec.requiredDropCapabilities[] || kubectl get psp restricted-noroot-psp && kubectl get psp restricted-noroot-psp -o json | jq -r .spec.requiredDropCapabilities[] +``` + +**Expected Result**: + +```console +'ALL' is equal to 'ALL' +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ Error from server (NotFound): podsecuritypolicies.policy "global-restricted-psp" not found Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ NAME PRIV CAPS SELINUX RUNASUSER FSGROUP SUPGROUP READONLYROOTFS VOLUMES restricted-noroot-psp false RunAsAny MustRunAsNonRoot MustRunAs MustRunAs false configMap,emptyDir,projected,secret,downwardAPI,csi,persistentVolumeClaim Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ ALL +``` + +### 5.2.9 Minimize the admission of containers with added capabilities (Automated) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports Network Policies (Automated) + + +**Result:** pass + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +**Audit:** + +```bash +kubectl get pods --all-namespaces --selector='k8s-app in (calico-node, canal, cilium)' -o name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +--count=1 +``` + +### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +**Audit Script:** `check_for_rke2_network_policies.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +for namespace in kube-system kube-public default; do + policy_count=$(/var/lib/rancher/rke2/bin/kubectl get networkpolicy -n ${namespace} -o json | jq -r '.items | length') + if [ ${policy_count} -eq 0 ]; then + echo "false" + exit + fi +done + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_rke2_network_policies.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md b/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md new file mode 100644 index 00000000000..b7d4a36ea4b --- /dev/null +++ b/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md @@ -0,0 +1,2967 @@ +--- +title: RKE2 Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25/v1.26/v1.27 +--- + + + + + +This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25/v1.26/v1.27 | + +This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE2 install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +RKE2 launches control plane components as static pods, managed by the kubelet, and uses containerd as the container runtime. Configuration is defined by arguments passed to the container at the time of initialization or via configuration file. + +Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE2 nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then find /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml -name '*etcd*' | xargs stat -c permissions=%a; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=644 +``` + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root root:root +``` + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/db/etcd +``` + +**Expected Result**: + +```console +permissions has permissions 700, expected 700 or more restrictive +``` + +**Returned Value**: + +```console +permissions=700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** Not Applicable + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/admin.conf + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/cred/admin.kubeconfig +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/admin.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'600' is present +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /var/lib/rancher/rke2/server/cred/controller.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/server/cred/controller.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'600' is present +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/server/cred/controller.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/controller.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /etc/kubernetes/pki/ + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/tls +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /var/lib/rancher/rke2/server/tls/*.crt + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.crt +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /var/lib/rancher/rke2/server/tls/*.key + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.key +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.4 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.5 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-certificate-authority' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.6 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.7 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.9 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.10 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.12 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.13 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true root 1018768 2419 99 16:17 ? 00:00:00 kubectl get --server=https://localhost:6443/ --client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --raw=/readyz +``` + +### 1.2.14 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.15 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.16 Ensure that the --secure-port argument is not set to 0 - NoteThis recommendation is obsolete and will be deleted per the consensus process (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.17 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.18 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.19 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.20 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.21 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +### 1.2.22 Ensure that the --request-timeout argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +and set the below parameter as appropriate and if needed. +For example, --request-timeout=300s + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--request-timeout' is not present OR '--request-timeout' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.23 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.24 Ensure that the --service-account-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.25 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.26 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.27 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.28 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.29 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.30 Ensure that encryption providers are appropriately configured (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit:** + +```bash +ENCRYPTION_PROVIDER_CONFIG=$(ps -ef | grep kube-apiserver | grep -- --encryption-provider-config | sed 's%.*encryption-provider-config[= ]\([^ ]*\).*%\1%') if test -e $ENCRYPTION_PROVIDER_CONFIG; then grep -A1 'providers:' $ENCRYPTION_PROVIDER_CONFIG | tail -n1 | grep -o "[A-Za-z]*" | sed 's/^/provider=/'; fi +``` + +**Expected Result**: + +```console +'provider' is present +``` + +### 1.2.31 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 +Not Applicable. + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2645 2538 0 Sep11 ? 00:05:26 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 2645 2538 0 Sep11 ? 00:05:26 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= +Not Applicable. + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and set the below parameter. +--client-cert-auth="true" +Not Applicable. + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-14-226 ETCD_UNSUPPORTED_ARCH= FILE_HASH=e9ca6f328e70dd3c17ba78c302ee32927a4961198e95d1d948114a5d7e350d99 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=aa1658a59ab75324ef67c786d08307e3 HOME=/ +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= +Not Applicable. + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and set the below parameter. +--peer-client-cert-auth=true +Not Applicable. + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-14-226 ETCD_UNSUPPORTED_ARCH= FILE_HASH=e9ca6f328e70dd3c17ba78c302ee32927a4961198e95d1d948114a5d7e350d99 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=aa1658a59ab75324ef67c786d08307e3 HOME=/ +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Audit Config:** + +```bash +cat /var/lib/rancher/rke2/server/db/etcd/config +``` + +**Expected Result**: + +```console +'ETCD_TRUSTED_CA_FILE' is present OR '{.peer-transport-security.trusted-ca-file}' is equal to '/var/lib/rancher/rke2/server/tls/etcd/peer-ca.crt' +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-14-226 ETCD_UNSUPPORTED_ARCH= FILE_HASH=e9ca6f328e70dd3c17ba78c302ee32927a4961198e95d1d948114a5d7e350d99 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=aa1658a59ab75324ef67c786d08307e3 HOME=/ +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +### 3.1.2 Service account token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of service account tokens. + +### 3.1.3 Bootstrap token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of bootstrap tokens. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Automated) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-policy-file' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable. + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not applicable. + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit Script:** `check_cafile_permissions.sh` + +```bash +#!/usr/bin/env bash + +CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') +CAFILE=/node$CAFILE +if test -z $CAFILE; then CAFILE=$kubeletcafile; fi +if test -e $CAFILE; then stat -c permissions=%a $CAFILE; fi + +``` + +**Audit Execution:** + +```bash +./check_cafile_permissions.sh +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit Script:** `check_cafile_ownership.sh` + +```bash +#!/usr/bin/env bash + +CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') +CAFILE=/node$CAFILE +if test -z $CAFILE; then CAFILE=$kubeletcafile; fi +if test -e $CAFILE; then stat -c %U:%G $CAFILE; fi + +``` + +**Audit Execution:** + +```bash +./check_cafile_ownership.sh +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.streamingConnectionIdleTimeout}' is present OR '{.streamingConnectionIdleTimeout}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.6 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.makeIPTablesUtilChains}' is present OR '{.makeIPTablesUtilChains}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.7 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable. + +### 4.2.8 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.eventRecordQPS}' is present OR '{.eventRecordQPS}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.9 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.10 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.11 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** pass + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.featureGates.RotateKubeletServerCertificate}' is present OR '{.featureGates.RotateKubeletServerCertificate}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.12 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{range .tlsCipherSuites[:]}{}{','}{end}' is present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.13 Ensure that a limit is set on pod PIDs (Manual) + + +**Result:** warn + +**Remediation:** +Decide on an appropriate level for this parameter and set it, +either via the --pod-max-pids command line parameter or the PodPidsLimit configuration file setting. + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.podPidsLimit}' is present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Manual) + + +**Result:** warn + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +### 5.1.9 Minimize access to create persistent volumes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to PersistentVolume objects in the cluster. + +### 5.1.10 Minimize access to the proxy sub-resource of nodes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the proxy sub-resource of node objects. + +### 5.1.11 Minimize access to the approval sub-resource of certificatesigningrequests objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the approval sub-resource of certificatesigningrequest objects. + +### 5.1.12 Minimize access to webhook configuration objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the validatingwebhookconfigurations or mutatingwebhookconfigurations objects + +### 5.1.13 Minimize access to the service account token creation (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the token sub-resource of serviceaccount objects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +### 5.2.7 Minimize the admission of root containers (Manual) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Automated) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md b/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md deleted file mode 100644 index 252accbb79d..00000000000 --- a/docs/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md +++ /dev/null @@ -1,3196 +0,0 @@ ---- -title: RKE2 Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25 ---- - -This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25 | - -This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE2 install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -RKE2 launches control plane components as static pods, managed by the kubelet, and uses containerd as the container runtime. Configuration is defined by arguments passed to the container at the time of initialization or via configuration file. - -Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE2 nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Master Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the -control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %a /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -644 -``` - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' -``` - -**Expected Result**: - -```console -'permissions' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 permissions=644 -``` - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root -``` - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/db/etcd -``` - -**Expected Result**: - -```console -permissions has permissions 700, expected 700 or more restrictive -``` - -**Returned Value**: - -```console -permissions=700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/db/etcd -``` - -**Expected Result**: - -```console -'etcd:etcd' is present -``` - -**Returned Value**: - -```console -etcd:etcd -``` - -### 1.1.13 Ensure that the admin.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 600 /etc/kubernetes/admin.conf - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/admin.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/admin.conf - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/admin.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 scheduler - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root scheduler - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 controllermanager - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/controller.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /var/lib/rancher/rke2/server/cred/controller.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/controller.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown -R root:root /var/lib/rancher/rke2/server/tls/ - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/tls -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 644 /var/lib/rancher/rke2/server/tls/*.crt - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.crt -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /var/lib/rancher/rke2/server/tls/*.key - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.key -``` - -**Expected Result**: - -```console -'permissions' is equal to '600' -``` - -**Returned Value**: - -```console -permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-https' is present OR '--kubelet-https' is not present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'AlwaysPullImages' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:05 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true root 15378 3910 99 23:32 ? 00:00:00 kubectl get --server=https://localhost:6443/ --client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --raw=/readyz -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -root 3980 3910 19 23:26 ? 00:01:06 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -### 1.2.33 Ensure that encryption providers are appropriately configured (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit:** - -```bash -/bin/sh -c 'if grep aescbc /var/lib/rancher/rke2/server/cred/encryption-config.json; then echo 0; fi' -``` - -**Expected Result**: - -```console -'0' is present -``` - -**Returned Value**: - -```console -{"kind":"EncryptionConfiguration","apiVersion":"apiserver.config.k8s.io/v1","resources":[{"resources":["secrets"],"providers":[{"aescbc":{"keys":[{"name":"aescbckey","secret":"TSpBkJhIU0sRx+84IZuBZ1qO+eaRdW31C7QCnF3+n8s="}]}},{"identity":{}}]}]} 0 -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--terminated-pod-gc-threshold' is present -``` - -**Returned Value**: - -```console -root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 4128 4029 2 23:27 ? 00:00:06 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 4126 4014 0 23:27 ? 00:00:02 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 4126 4014 0 23:27 ? 00:00:02 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and set the below parameter. ---client-cert-auth="true" - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-25-112 ETCD_UNSUPPORTED_ARCH= POD_HASH=ab0b8a2ee7711940d3d951edece075f3 FILE_HASH=068666c5f959fc1023cb1761daaaed212727c04120747d825c78fd7683122e6d NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 HOME=/ -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and set the below parameter. ---peer-client-cert-auth=true - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-25-112 ETCD_UNSUPPORTED_ARCH= POD_HASH=ab0b8a2ee7711940d3d951edece075f3 FILE_HASH=068666c5f959fc1023cb1761daaaed212727c04120747d825c78fd7683122e6d NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 HOME=/ -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Audit Config:** - -```bash -cat /var/lib/rancher/rke2/server/db/etcd/config -``` - -**Expected Result**: - -```console -'ETCD_TRUSTED_CA_FILE' is present OR '{.peer-transport-security.trusted-ca-file}' is equal to '/var/lib/rancher/rke2/server/tls/etcd/peer-ca.crt' -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-25-112 ETCD_UNSUPPORTED_ARCH= POD_HASH=ab0b8a2ee7711940d3d951edece075f3 FILE_HASH=068666c5f959fc1023cb1761daaaed212727c04120747d825c78fd7683122e6d NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 HOME=/ -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Automated) - - -**Result:** pass - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep | grep -o audit-policy-file -``` - -**Expected Result**: - -```console -'audit-policy-file' is equal to 'audit-policy-file' -``` - -**Returned Value**: - -```console -audit-policy-file -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chmod 644 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive OR '/var/lib/rancher/rke2/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is present OR '/var/lib/rancher/rke2/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/kubelet.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit Script:** `check_cafile_permissions.sh` - -```bash -#!/usr/bin/env bash - -CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') -CAFILE=/node$CAFILE -if test -z $CAFILE; then CAFILE=$kubeletcafile; fi -if test -e $CAFILE; then stat -c permissions=%a $CAFILE; fi - -``` - -**Audit Execution:** - -```bash -./check_cafile_permissions.sh -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit Script:** `check_cafile_ownership.sh` - -```bash -#!/usr/bin/env bash - -CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') -CAFILE=/node$CAFILE -if test -z $CAFILE; then CAFILE=$kubeletcafile; fi -if test -e $CAFILE; then stat -c %U:%G $CAFILE; fi - -``` - -**Audit Execution:** - -```bash -./check_cafile_ownership.sh -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /etc/rancher/rke2/rke2.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/rancher/rke2/rke2.yaml; then stat -c permissions=%a /etc/rancher/rke2/rke2.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /etc/rancher/rke2/rke2.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/rancher/rke2/rke2.yaml; then stat -c %U:%G /etc/rancher/rke2/rke2.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3727 3667 3 23:26 ? 00:00:11 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-112 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c1cd514-db7b-4692-a1c4-cacb2656161f --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3727 3667 3 23:26 ? 00:00:11 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-112 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c1cd514-db7b-4692-a1c4-cacb2656161f --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3727 3667 3 23:26 ? 00:00:11 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-112 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c1cd514-db7b-4692-a1c4-cacb2656161f --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3727 3667 3 23:26 ? 00:00:11 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-112 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c1cd514-db7b-4692-a1c4-cacb2656161f --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.streamingConnectionIdleTimeout}' is present OR '{.streamingConnectionIdleTimeout}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUpZblVvZ2U2bHVuNFN1WVVaN3VBQTVGYXV6blBaQzV2WHlpc1R2SVRjOXFvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTWZZR0trdVFaOEtTOXFoamN2bk9yYld6TWxXdTN1N0RnYmtJR1Y2Um9GektaVFhhbWx2MwpuOTJEZU5EVFVFY3J5SUZjdDkwaFJoMGJWWTRxWXZiV0pRPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3727 3667 3 23:26 ? 00:00:11 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-112 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c1cd514-db7b-4692-a1c4-cacb2656161f --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.makeIPTablesUtilChains}' is present OR '{.makeIPTablesUtilChains}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUpZblVvZ2U2bHVuNFN1WVVaN3VBQTVGYXV6blBaQzV2WHlpc1R2SVRjOXFvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTWZZR0trdVFaOEtTOXFoamN2bk9yYld6TWxXdTN1N0RnYmtJR1Y2Um9GektaVFhhbWx2MwpuOTJEZU5EVFVFY3J5SUZjdDkwaFJoMGJWWTRxWXZiV0pRPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.eventRecordQPS}' is present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUJlVENDQVIrZ0F3SUJBZ0lCQURBS0JnZ3Foa2pPUFFRREFqQWtNU0l3SUFZRFZRUUREQmx5YTJVeUxYTmwKY25abGNpMWpZVUF4TmpjM05EVXpPVE00TUI0WERUSXpNREl5TmpJek1qVXpPRm9YRFRNek1ESXlNekl6TWpVegpPRm93SkRFaU1DQUdBMVVFQXd3WmNtdGxNaTF6WlhKMlpYSXRZMkZBTVRZM056UTFNemt6T0RCWk1CTUdCeXFHClNNNDlBZ0VHQ0NxR1NNNDlBd0VIQTBJQUJOUHllSlcwNE9lMUN6clo5cHplN09WWlliMlh4QmNvWUJ5Z3JRcUwKYUdpR29tN2xLNGs2ZW1uaUZQekpiOU9EQ0hDRmYyVUZaVXZDQTQxcUVmNVB3NlNqUWpCQU1BNEdBMVVkRHdFQgovd1FFQXdJQ3BEQVBCZ05WSFJNQkFmOEVCVEFEQVFIL01CMEdBMVVkRGdRV0JCUnhUdGJTbTVMTnFrditkYXQrCmczalBWWXJjcERBS0JnZ3Foa2pPUFFRREFnTklBREJGQWlBN08wV1NNVHo4djgwM3BZK3hFeDR2SUZaVEMraVoKUHVDc082eFRuVVVtb2dJaEFPY1NqQVdkUVJ0UmJvaUhJbTd2RHZuM1czT1JmYlUwaXU2UUhNcXdsTGs4Ci0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0K server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUpZblVvZ2U2bHVuNFN1WVVaN3VBQTVGYXV6blBaQzV2WHlpc1R2SVRjOXFvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTWZZR0trdVFaOEtTOXFoamN2bk9yYld6TWxXdTN1N0RnYmtJR1Y2Um9GektaVFhhbWx2MwpuOTJEZU5EVFVFY3J5SUZjdDkwaFJoMGJWWTRxWXZiV0pRPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3727 3667 3 23:26 ? 00:00:11 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-112 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c1cd514-db7b-4692-a1c4-cacb2656161f --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUpZblVvZ2U2bHVuNFN1WVVaN3VBQTVGYXV6blBaQzV2WHlpc1R2SVRjOXFvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTWZZR0trdVFaOEtTOXFoamN2bk9yYld6TWxXdTN1N0RnYmtJR1Y2Um9GektaVFhhbWx2MwpuOTJEZU5EVFVFY3J5SUZjdDkwaFJoMGJWWTRxWXZiV0pRPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) - - -**Result:** pass - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.featureGates.RotateKubeletServerCertificate}' is present OR '{.featureGates.RotateKubeletServerCertificate}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUpZblVvZ2U2bHVuNFN1WVVaN3VBQTVGYXV6blBaQzV2WHlpc1R2SVRjOXFvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTWZZR0trdVFaOEtTOXFoamN2bk9yYld6TWxXdTN1N0RnYmtJR1Y2Um9GektaVFhhbWx2MwpuOTJEZU5EVFVFY3J5SUZjdDkwaFJoMGJWWTRxWXZiV0pRPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{range .tlsCipherSuites[:]}{}{','}{end}' is present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUpZblVvZ2U2bHVuNFN1WVVaN3VBQTVGYXV6blBaQzV2WHlpc1R2SVRjOXFvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTWZZR0trdVFaOEtTOXFoamN2bk9yYld6TWxXdTN1N0RnYmtJR1Y2Um9GektaVFhhbWx2MwpuOTJEZU5EVFVFY3J5SUZjdDkwaFJoMGJWWTRxWXZiV0pRPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Automated) - - -**Result:** pass - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -**Audit Script:** `check_for_default_sa.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) -if [[ ${count_sa} -gt 0 ]]; then - echo "false" - exit -fi - -for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") -do - for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[].kind=="ServiceAccount" and .subjects[].name=="default") or (.subjects[].kind=="Group" and .subjects[].name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') - do - read kind name <<<$(IFS=","; echo $result) - resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[] != "podsecuritypolicies")' | wc -l) - if [[ ${resource_count} -gt 0 ]]; then - echo "false" - exit - fi - done -done - - -echo "true" -``` - -**Audit Execution:** - -```bash -./check_for_default_sa.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): serviceaccounts is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "serviceaccounts" in API group "" at the cluster scope Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "calico-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-fleet-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-impersonation-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cis-operator-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "default" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-node-lease" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-public" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "local" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "tigera-operator" true -``` - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -**Audit:** - -```bash -kubectl get psp global-restricted-psp -o json | jq -r '.spec.runAsUser.rule' -``` - -**Expected Result**: - -```console -'MustRunAsNonRoot' is present -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" -``` - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** fail - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -**Audit:** - -```bash -kubectl get psp global-restricted-psp -o json | jq -r .spec.requiredDropCapabilities[] -``` - -**Expected Result**: - -```console -'ALL' is present -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" -``` - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports Network Policies (Automated) - - -**Result:** pass - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -**Audit:** - -```bash -kubectl get pods --all-namespaces --selector='k8s-app in (calico-node, canal, cilium)' -o name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) - - -**Result:** true - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -**Audit Script:** `check_for_rke2_network_policies.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -for namespace in kube-system kube-public default; do - policy_count=$(/var/lib/rancher/rke2/bin/kubectl get networkpolicy -n ${namespace} -o json | jq -r '.items | length') - if [ ${policy_count} -eq 0 ]; then - echo "false" - exit - fi -done - -echo "true" - -``` - -**Audit Execution:** - -```bash -./check_for_rke2_network_policies.sh -``` - -**Expected Result**: - -```console -'true' is present -``` - -**Returned Value**: - -```console -true -``` - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. diff --git a/docs/reference-guides/rancher-security/kubernetes-security-best-practices.md b/docs/reference-guides/rancher-security/kubernetes-security-best-practices.md index a863dd44e52..ace8bd95fab 100644 --- a/docs/reference-guides/rancher-security/kubernetes-security-best-practices.md +++ b/docs/reference-guides/rancher-security/kubernetes-security-best-practices.md @@ -2,6 +2,10 @@ title: Kubernetes Security Best Practices --- + + + + ### Restricting cloud metadata API access Cloud providers such as AWS, Azure, DigitalOcean or GCP often expose metadata services locally to instances. By default, this endpoint is accessible by pods running on a cloud instance, including pods in hosted Kubernetes providers such as EKS, AKS, DigitalOcean Kubernetes or GKE, and can contain cloud credentials for that node, provisioning data such as kubelet credentials, or other sensitive data. To mitigate this risk when running on a cloud platform, follow the [Kubernetes security recommendations](https://kubernetes.io/docs/tasks/administer-cluster/securing-a-cluster/#restricting-cloud-metadata-api-access): limit permissions given to instance credentials, use network policies to restrict pod access to the metadata API, and avoid using provisioning data to deliver secrets. diff --git a/docs/reference-guides/rancher-security/psa-restricted-exemptions.md b/docs/reference-guides/rancher-security/psa-restricted-exemptions.md index 2373ec352c4..0f35551cf31 100644 --- a/docs/reference-guides/rancher-security/psa-restricted-exemptions.md +++ b/docs/reference-guides/rancher-security/psa-restricted-exemptions.md @@ -2,6 +2,10 @@ title: Sample PodSecurityConfiguration --- + + + + The following PodSecurityConfiguration contains the required Rancher namespace exemptions for a `rancher-restricted` cluster to run properly. ```yaml diff --git a/docs/reference-guides/rancher-security/security-advisories-and-cves.md b/docs/reference-guides/rancher-security/security-advisories-and-cves.md index 872a908f633..8f3649e7a85 100644 --- a/docs/reference-guides/rancher-security/security-advisories-and-cves.md +++ b/docs/reference-guides/rancher-security/security-advisories-and-cves.md @@ -2,6 +2,10 @@ title: Security Advisories and CVEs --- + + + + Rancher is committed to informing the community of security issues in our products. Rancher will publish security advisories and CVEs (Common Vulnerabilities and Exposures) for issues we have resolved. New security advisories are also published in Rancher's GitHub [security page](https://github.com/rancher/rancher/security/advisories). | ID | Description | Date | Resolution | diff --git a/docs/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md b/docs/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md index d7358c29b62..1d9d46c75d4 100644 --- a/docs/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md +++ b/docs/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md @@ -2,6 +2,10 @@ title: About rancher-selinux --- + + + + To allow Rancher to work with SELinux, some functionality has to be manually enabled for the SELinux nodes. To help with that, Rancher provides a SELinux RPM. The `rancher-selinux` RPM only contains policies for the [rancher-logging application.](https://github.com/rancher/charts/tree/dev-v2.5/charts/rancher-logging) diff --git a/docs/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md b/docs/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md index fe124221e5f..c5edf5e0017 100644 --- a/docs/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md +++ b/docs/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md @@ -2,6 +2,10 @@ title: About rke2-selinux --- + + + + `rke2-selinux` provides policies for RKE2. It is installed automatically when the RKE2 installer script detects that it is running on an RPM-based distro. The `rke2-selinux` GitHub repository is [here.](https://github.com/rancher/rke2-selinux) diff --git a/docusaurus.config.js b/docusaurus.config.js index 7789a046093..5595c9a4e82 100644 --- a/docusaurus.config.js +++ b/docusaurus.config.js @@ -1143,28 +1143,52 @@ module.exports = { from: '/v2.6/explanations/integrations-in-rancher/opa-gatekeeper' }, // Redirects for restructure from PR #234 (end) { - to: "/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + to: "/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + from: "/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24" + }, + { + to: "/v2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + from: "/2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24" + }, + { + to: "/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", from: "/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.25" }, { - to: "/v2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + to: "/v2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", from: "/v2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.25" }, { - to: "/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + to: "/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + from: "/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24" + }, + { + to: "/v2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + from: "/v2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24" + }, + { + to: "/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", from: "/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.25" }, { - to: "/v2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + to: "/v2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", from: "/v2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.25" }, { - to: "/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + to: "/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + from: "/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24" + }, + { + to: "/v2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + from: "/v2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24" + }, + { + to: "/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", from: "/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.25" }, { - to: "/v2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + to: "/v2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", from: "/v2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.25" }, { diff --git a/sidebars.js b/sidebars.js index a0e4dcfcfcf..71e5f0a46d6 100644 --- a/sidebars.js +++ b/sidebars.js @@ -1070,8 +1070,8 @@ const sidebars = { }, items: [ "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23", - "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24", - "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", ], }, { @@ -1083,8 +1083,8 @@ const sidebars = { }, items: [ "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23", - "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24", - "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", ], }, { @@ -1096,8 +1096,8 @@ const sidebars = { }, items: [ "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23", - "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24", - "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25", + "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27", ], }, ], diff --git a/static/img/backup-container.png b/static/img/backup-container.png deleted file mode 100644 index e1fce01bd2c..00000000000 Binary files a/static/img/backup-container.png and /dev/null differ diff --git a/static/img/click-register-new-app.png b/static/img/click-register-new-app.png deleted file mode 100644 index ac467965d19..00000000000 Binary files a/static/img/click-register-new-app.png and /dev/null differ diff --git a/static/img/create-backup-tarball.png b/static/img/create-backup-tarball.png deleted file mode 100644 index e659d50f351..00000000000 Binary files a/static/img/create-backup-tarball.png and /dev/null differ diff --git a/static/img/default-grafana-dashboards.png b/static/img/default-grafana-dashboards.png deleted file mode 100644 index 9918dae8236..00000000000 Binary files a/static/img/default-grafana-dashboards.png and /dev/null differ diff --git a/static/img/dir-backup-tarball-clear.png b/static/img/dir-backup-tarball-clear.png deleted file mode 100644 index 35395285fdf..00000000000 Binary files a/static/img/dir-backup-tarball-clear.png and /dev/null differ diff --git a/static/img/dir-backup-tarball.png b/static/img/dir-backup-tarball.png deleted file mode 100644 index eeb2a4687e6..00000000000 Binary files a/static/img/dir-backup-tarball.png and /dev/null differ diff --git a/static/img/docker-container-ps-output.png b/static/img/docker-container-ps-output.png deleted file mode 100644 index edd911fb566..00000000000 Binary files a/static/img/docker-container-ps-output.png and /dev/null differ diff --git a/static/img/no-ingress.png b/static/img/no-ingress.png deleted file mode 100644 index fa1a0a0fdd2..00000000000 Binary files a/static/img/no-ingress.png and /dev/null differ diff --git a/static/img/persistent-volume.png b/static/img/persistent-volume.png deleted file mode 100644 index 327da071bf2..00000000000 Binary files a/static/img/persistent-volume.png and /dev/null differ diff --git a/static/img/rancher_overview_2.png b/static/img/rancher_overview_2.png deleted file mode 100644 index 00ce8eb2c27..00000000000 Binary files a/static/img/rancher_overview_2.png and /dev/null differ diff --git a/static/img/rke-etcd-backup.png b/static/img/rke-etcd-backup.png deleted file mode 100644 index b40c550618d..00000000000 Binary files a/static/img/rke-etcd-backup.png and /dev/null differ diff --git a/static/img/stop-rancher-container.gif b/static/img/stop-rancher-container.gif deleted file mode 100644 index 92468116973..00000000000 Binary files a/static/img/stop-rancher-container.gif and /dev/null differ diff --git a/versioned_docs/version-2.0-2.4/backups/backup/backup.md b/versioned_docs/version-2.0-2.4/backups/backup/backup.md deleted file mode 100644 index 065e8159532..00000000000 --- a/versioned_docs/version-2.0-2.4/backups/backup/backup.md +++ /dev/null @@ -1,18 +0,0 @@ ---- -title: Backup ---- - - - - - -This section contains information about how to create backups of your Rancher data and how to restore them in a disaster scenario. - - - Rancher server backups: - - [Rancher installed on a K3s Kubernetes cluster](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/back-up-k3s-installed-rancher.md) - - [Rancher installed on an RKE Kubernetes cluster](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/back-up-rancher-launched-kubernetes-clusters.md) - - [Rancher installed with Docker](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/back-up-docker-installed-rancher.md) - -For information on backing up Rancher launched Kubernetes clusters, refer to [this section.](../../how-to-guides/advanced-user-guides/manage-clusters/backing-up-etcd.md) - -If you are looking to back up your [Rancher launched Kubernetes cluster](../../pages-for-subheaders/launch-kubernetes-with-rancher.md), please refer [here](../../how-to-guides/advanced-user-guides/manage-clusters/backing-up-etcd.md). diff --git a/versioned_docs/version-2.0-2.4/backups/restore/restore.md b/versioned_docs/version-2.0-2.4/backups/restore/restore.md deleted file mode 100644 index 7467b146f48..00000000000 --- a/versioned_docs/version-2.0-2.4/backups/restore/restore.md +++ /dev/null @@ -1,11 +0,0 @@ ---- -title: Restore ---- - -If you lose the data on your Rancher Server, you can restore it if you have backups stored in a safe location. - -- [Restoring backups for Rancher installed with Docker](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-docker-installed-rancher.md) -- [Restoring backups for Rancher installed on an RKE Kubernetes cluster](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-rancher-launched-kubernetes-clusters-from-backup.md) -- [Restoring backups for Rancher installed on a K3s Kubernetes cluster](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-k3s-installed-rancher.md) - -If you are looking to restore your [Rancher launched Kubernetes cluster](../../pages-for-subheaders/launch-kubernetes-with-rancher.md), please refer to [this section](../../how-to-guides/advanced-user-guides/manage-clusters/restoring-etcd.md). diff --git a/versioned_docs/version-2.0-2.4/how-to-guides/new-user-guides/helm-charts-in-rancher/creating-apps.md b/versioned_docs/version-2.0-2.4/how-to-guides/new-user-guides/helm-charts-in-rancher/creating-apps.md index 270d7674c0c..beeea68d679 100644 --- a/versioned_docs/version-2.0-2.4/how-to-guides/new-user-guides/helm-charts-in-rancher/creating-apps.md +++ b/versioned_docs/version-2.0-2.4/how-to-guides/new-user-guides/helm-charts-in-rancher/creating-apps.md @@ -65,7 +65,6 @@ Before you create your own custom catalog, you should have a basic understanding A file that contains questions for a form. These form questions simplify deployment of a chart. Without it, you must configure the deployment using key value pairs, which is more difficult. The following image displays the difference between a Rancher chart (which includes `questions.yml`) and a native Helm chart (which does not). -
Rancher Chart with questions.yml (left) vs. Helm Chart without (right)
![questions.yml](/img/questions.png) diff --git a/versioned_docs/version-2.0-2.4/reference-guides/about-the-api/api-tokens.md b/versioned_docs/version-2.0-2.4/reference-guides/about-the-api/api-tokens.md index 8e6a1a9b8c1..64e450463e2 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/about-the-api/api-tokens.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/about-the-api/api-tokens.md @@ -3,7 +3,7 @@ title: API Tokens --- - + By default, some cluster-level API tokens are generated with infinite time-to-live (`ttl=0`). In other words, API tokens with `ttl=0` never expire unless you invalidate them. Tokens are not invalidated by changing a password. diff --git a/versioned_docs/version-2.0-2.4/reference-guides/cli-with-rancher/kubectl-utility.md b/versioned_docs/version-2.0-2.4/reference-guides/cli-with-rancher/kubectl-utility.md index 003aea86dba..255b8ad4ac1 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/cli-with-rancher/kubectl-utility.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/cli-with-rancher/kubectl-utility.md @@ -3,7 +3,7 @@ title: kubectl Utility --- - + ## kubectl diff --git a/versioned_docs/version-2.0-2.4/reference-guides/cli-with-rancher/rancher-cli.md b/versioned_docs/version-2.0-2.4/reference-guides/cli-with-rancher/rancher-cli.md index c0850617aff..9b50fd35f2e 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/cli-with-rancher/rancher-cli.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/cli-with-rancher/rancher-cli.md @@ -4,7 +4,7 @@ description: Interact with Rancher using command line interface (CLI) tools from --- - + The Rancher CLI (Command Line Interface) is a unified tool that you can use to interact with Rancher. With this tool, you can operate Rancher using a command line rather than the GUI. diff --git a/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md b/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md index 4997518b135..828c9ca1ce8 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md @@ -3,7 +3,7 @@ title: EC2 Node Template Configuration --- - + For more details about EC2, nodes, refer to the official documentation for the [EC2 Management Console](https://aws.amazon.com/ec2). diff --git a/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md b/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md index 3c969b1d06e..d8c0f3dcdab 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md @@ -3,7 +3,7 @@ title: Azure Node Template Configuration --- - + For more information about Azure, refer to the official [Azure documentation.](https://docs.microsoft.com/en-us/azure/?product=featured) diff --git a/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md b/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md index 22fd6532146..24bfabe753a 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md @@ -3,7 +3,7 @@ title: DigitalOcean Node Template Configuration --- - + diff --git a/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md b/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md index a0e092fee87..3c363d053cf 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md @@ -3,7 +3,7 @@ title: Rancher Agent Options --- - + Rancher deploys an agent on each node to communicate with the node. This pages describes the options that can be passed to the agent. To use these options, you will need to [create a cluster with custom nodes](../../../../pages-for-subheaders/use-existing-nodes.md) and add the options to the generated `docker run` command when adding a node. diff --git a/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/architecture-recommendations.md b/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/architecture-recommendations.md index 36794f75b40..b7fc1fc46a0 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/architecture-recommendations.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/architecture-recommendations.md @@ -2,6 +2,10 @@ title: Architecture Recommendations --- + + + + Kubernetes cluster. If you are installing Rancher on a single node, the main architecture recommendation that applies to your installation is that the cluster running Rancher should be [separate from downstream clusters.](#separation-of-rancher-and-user-clusters) ## Separation of Rancher and User Clusters diff --git a/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md b/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md index fabdcd6f8b9..e45c9e17140 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md @@ -2,6 +2,10 @@ title: Communicating with Downstream User Clusters --- + + + + This section describes how Rancher provisions and manages the downstream user clusters that run your apps and services. The below diagram shows how the cluster controllers, cluster agents, and node agents allow Rancher to control downstream clusters. diff --git a/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/rancher-server-and-components.md b/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/rancher-server-and-components.md index 6bf86ee8d7c..7c22dba7b10 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/rancher-server-and-components.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/rancher-manager-architecture/rancher-server-and-components.md @@ -2,6 +2,10 @@ title: Rancher Server and Components --- + + + + The majority of Rancher 2.x software runs on the Rancher Server. Rancher Server includes all the software components used to manage the entire Rancher deployment. The figure below illustrates the high-level architecture of Rancher 2.x. The figure depicts a Rancher Server installation that manages two downstream Kubernetes clusters: one created by RKE and another created by Amazon EKS (Elastic Kubernetes Service). diff --git a/versioned_docs/version-2.0-2.4/reference-guides/rancher-security/security-advisories-and-cves.md b/versioned_docs/version-2.0-2.4/reference-guides/rancher-security/security-advisories-and-cves.md index 84381237884..a9142bd4b34 100644 --- a/versioned_docs/version-2.0-2.4/reference-guides/rancher-security/security-advisories-and-cves.md +++ b/versioned_docs/version-2.0-2.4/reference-guides/rancher-security/security-advisories-and-cves.md @@ -2,6 +2,10 @@ title: Rancher CVEs and Resolutions --- + + + + Rancher is committed to informing the community of security issues in our products. Rancher will publish CVEs (Common Vulnerabilities and Exposures) for issues we have resolved. | ID | Description | Date | Resolution | diff --git a/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.0/rancher-v2.3.0.md b/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.0/rancher-v2.3.0.md deleted file mode 100644 index a5d9ae8ec66..00000000000 --- a/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.0/rancher-v2.3.0.md +++ /dev/null @@ -1,19 +0,0 @@ ---- -title: Rancher v2.3.0 ---- - -### Self Assessment Guide - -This [guide](../../../reference-guides/rancher-security/rancher-v2.3-hardening-guides/rancher-v2.3.0-self-assessment-guide-with-cis-v1.4.1-benchmark.md) corresponds to specific versions of the hardening guide, Rancher, Kubernetes, and the CIS Benchmark: - -Self Assessment Guide Version | Rancher Version | Hardening Guide Version | Kubernetes Version | CIS Benchmark Version ----------------------------|----------|---------|-------|----- -Self Assessment Guide v2.3 | Rancher v2.3.0-2.3.2 | Hardening Guide v2.3 | Kubernetes 1.15 | Benchmark v1.4.1 - -### Hardening Guide - -This hardening [guide](../../../reference-guides/rancher-security/rancher-v2.3-hardening-guides/rancher-v2.3.0-hardening-guide-with-cis-v1.4.1-benchmark.md) is intended to be used with specific versions of the CIS Kubernetes Benchmark, Kubernetes, and Rancher: - -Hardening Guide Version | Rancher Version | CIS Benchmark Version | Kubernetes Version -------------------------|----------------|-----------------------|------------------ -Hardening Guide v2.3 | Rancher v2.3.0-v2.3.2 | Benchmark v1.4.1 | Kubernetes 1.15 \ No newline at end of file diff --git a/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.3/rancher-v2.3.3.md b/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.3/rancher-v2.3.3.md deleted file mode 100644 index c353c8a9a99..00000000000 --- a/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.3/rancher-v2.3.3.md +++ /dev/null @@ -1,19 +0,0 @@ ---- -title: Rancher v2.3.3 ---- - -### Self Assessment Guide - -This [guide](../../../reference-guides/rancher-security/rancher-v2.3-hardening-guides/rancher-v2.3.3-self-assessment-guide-with-cis-v1.4.1-benchmark.md) corresponds to specific versions of the hardening guide, Rancher, Kubernetes, and the CIS Benchmark: - -Self Assessment Guide Version | Rancher Version | Hardening Guide Version | Kubernetes Version | CIS Benchmark Version ----------------------------|----------|---------|-------|----- -Self Assessment Guide v2.3.3 | Rancher v2.3.3 | Hardening Guide v2.3.3 | Kubernetes v1.16 | Benchmark v1.4.1 - -### Hardening Guide - -This hardening [guide](../../../reference-guides/rancher-security/rancher-v2.3-hardening-guides/rancher-v2.3.3-hardening-guide-with-cis-v1.4.1-benchmark.md) is intended to be used with specific versions of the CIS Kubernetes Benchmark, Kubernetes, and Rancher: - -Hardening Guide Version | Rancher Version | CIS Benchmark Version | Kubernetes Version -------------------------|----------------|-----------------------|------------------ -Hardening Guide v2.3.3 | Rancher v2.3.3 | Benchmark v1.4.1 | Kubernetes 1.14, 1.15, and 1.16 \ No newline at end of file diff --git a/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.5/rancher-v2.3.5.md b/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.5/rancher-v2.3.5.md deleted file mode 100644 index cf519162c6c..00000000000 --- a/versioned_docs/version-2.0-2.4/security/rancher-2.3.x/rancher-v2.3.5/rancher-v2.3.5.md +++ /dev/null @@ -1,19 +0,0 @@ ---- -title: Rancher v2.3.5 ---- - -### Self Assessment Guide - -This [guide](../../../reference-guides/rancher-security/rancher-v2.3-hardening-guides/rancher-v2.3.5-self-assessment-guide-with-cis-v1.5-benchmark.md) corresponds to specific versions of the hardening guide, Rancher, Kubernetes, and the CIS Benchmark: - -Self Assessment Guide Version | Rancher Version | Hardening Guide Version | Kubernetes Version | CIS Benchmark Version ----------------------------|----------|---------|-------|----- -Self Assessment Guide v2.3.5 | Rancher v2.3.5 | Hardening Guide v2.3.5 | Kubernetes v1.15 | Benchmark v1.5 - -### Hardening Guide - -This hardening [guide](../../../reference-guides/rancher-security/rancher-v2.3-hardening-guides/rancher-v2.3.5-hardening-guide-with-cis-v1.5-benchmark.md) is intended to be used with specific versions of the CIS Kubernetes Benchmark, Kubernetes, and Rancher: - -Hardening Guide Version | Rancher Version | CIS Benchmark Version | Kubernetes Version -------------------------|----------------|-----------------------|------------------ -Hardening Guide v2.3.5 | Rancher v2.3.5 | Benchmark v1.5 | Kubernetes 1.15 \ No newline at end of file diff --git a/versioned_docs/version-2.5/backups/docker-installs/docker-installs.md b/versioned_docs/version-2.5/backups/docker-installs/docker-installs.md deleted file mode 100644 index cc211cee5e0..00000000000 --- a/versioned_docs/version-2.5/backups/docker-installs/docker-installs.md +++ /dev/null @@ -1,6 +0,0 @@ ---- -title: Backup and Restore for Rancher Installed with Docker ---- - -- [Backups](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/back-up-docker-installed-rancher.md) -- [Restores](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-docker-installed-rancher.md) \ No newline at end of file diff --git a/versioned_docs/version-2.5/cluster-provisioning/rke-clusters/options/options.md b/versioned_docs/version-2.5/cluster-provisioning/rke-clusters/options/options.md deleted file mode 100644 index 9fc981415b2..00000000000 --- a/versioned_docs/version-2.5/cluster-provisioning/rke-clusters/options/options.md +++ /dev/null @@ -1,302 +0,0 @@ ---- -title: RKE Cluster Configuration Reference ---- - - - - - -When Rancher installs Kubernetes, it uses [RKE](../../../pages-for-subheaders/launch-kubernetes-with-rancher.md) as the Kubernetes distribution. - -This section covers the configuration options that are available in Rancher for a new or existing RKE Kubernetes cluster. - -You can configure the Kubernetes options one of two ways: - -- [Rancher UI](#rancher-ui-options): Use the Rancher UI to select options that are commonly customized when setting up a Kubernetes cluster. -- [Cluster Config File](#cluster-config-file): Instead of using the Rancher UI to choose Kubernetes options for the cluster, advanced users can create an RKE config file. Using a config file allows you to set any of the options available in an RKE installation, except for system_images configuration, by specifying them in YAML. - -The RKE cluster config options are nested under the `rancher_kubernetes_engine_config` directive. For more information, see the section about the [cluster config file.](#cluster-config-file) - - -## Rancher UI Options - -When creating a cluster using one of the options described in [Rancher Launched Kubernetes](../../../pages-for-subheaders/launch-kubernetes-with-rancher.md), you can configure basic Kubernetes options using the **Cluster Options** section. - -### Kubernetes Version - -The version of Kubernetes installed on your cluster nodes. Rancher packages its own version of Kubernetes based on [hyperkube](https://github.com/rancher/hyperkube). - -### Network Provider - -The [Network Provider](https://kubernetes.io/docs/concepts/cluster-administration/networking/) that the cluster uses. For more details on the different networking providers, please view our [Networking FAQ](../../../faq/container-network-interface-providers.md). - ->**Note:** After you launch the cluster, you cannot change your network provider. Therefore, choose which network provider you want to use carefully, as Kubernetes doesn't allow switching between network providers. Once a cluster is created with a network provider, changing network providers would require you tear down the entire cluster and all its applications. - -Out of the box, Rancher is compatible with the following network providers: - -- [Canal](https://github.com/projectcalico/canal) -- [Flannel](https://github.com/coreos/flannel#flannel) -- [Calico](https://docs.projectcalico.org/v3.11/introduction/) -- [Weave](https://github.com/weaveworks/weave) - - -**Notes on Weave:** - -When Weave is selected as network provider, Rancher will automatically enable encryption by generating a random password. If you want to specify the password manually, please see how to configure your cluster using a [Config File](cluster-provisioning/rke-clusters/options/#cluster-config-file) and the [Weave Network Plug-in Options](https://rancher.com/docs/rke/latest/en/config-options/add-ons/network-plugins/#weave-network-plug-in-options). - -### Project Network Isolation - -Project network isolation is used to enable or disable communication between pods in different projects. - - - - -To enable project network isolation as a cluster option, you will need to use any RKE network plugin that supports the enforcement of Kubernetes network policies, such as Canal or the Cisco ACI plugin. - - - - -To enable project network isolation as a cluster option, you will need to use Canal as the CNI. - - - - -### Kubernetes Cloud Providers - -You can configure a [Kubernetes cloud provider](../../../pages-for-subheaders/set-up-cloud-providers.md). If you want to use [volumes and storage](../../../pages-for-subheaders/create-kubernetes-persistent-storage.md) in Kubernetes, typically you must select the specific cloud provider in order to use it. For example, if you want to use Amazon EBS, you would need to select the `aws` cloud provider. - ->**Note:** If the cloud provider you want to use is not listed as an option, you will need to use the [config file option](#cluster-config-file) to configure the cloud provider. Please reference the [RKE cloud provider documentation](https://rancher.com/docs/rke/latest/en/config-options/cloud-providers/) on how to configure the cloud provider. - -If you want to see all the configuration options for a cluster, please click **Show advanced options** on the bottom right. The advanced options are described below: - -### Private registries - -The cluster-level private registry configuration is only used for provisioning clusters. - -There are two main ways to set up private registries in Rancher: by setting up the [global default registry](../../../how-to-guides/advanced-user-guides/authentication-permissions-and-global-configuration/global-default-private-registry.md) through the **Settings** tab in the global view, and by setting up a private registry in the advanced options in the cluster-level settings. The global default registry is intended to be used for air-gapped setups, for registries that do not require credentials. The cluster-level private registry is intended to be used in all setups in which the private registry requires credentials. - -If your private registry requires credentials, you need to pass the credentials to Rancher by editing the cluster options for each cluster that needs to pull images from the registry. - -The private registry configuration option tells Rancher where to pull the [system images](https://rancher.com/docs/rke/latest/en/config-options/system-images/) or [addon images](https://rancher.com/docs/rke/latest/en/config-options/add-ons/) that will be used in your cluster. - -- **System images** are components needed to maintain the Kubernetes cluster. -- **Add-ons** are used to deploy several cluster components, including network plug-ins, the ingress controller, the DNS provider, or the metrics server. - -See the [RKE documentation on private registries](https://rancher.com/docs/rke/latest/en/config-options/private-registries/) for more information on the private registry for components applied during the provisioning of the cluster. - -### Authorized Cluster Endpoint - -Authorized Cluster Endpoint can be used to directly access the Kubernetes API server, without requiring communication through Rancher. - -> The authorized cluster endpoint is available only in clusters that Rancher has provisioned [using RKE](../../../pages-for-subheaders/rancher-manager-architecture.md#tools-for-provisioning-kubernetes-clusters). It is not available for clusters in hosted Kubernetes providers, such as Amazon's EKS. Additionally, the authorized cluster endpoint cannot be enabled for RKE clusters that are registered with Rancher; it is available only on Rancher-launched Kubernetes clusters. - -This is enabled by default in Rancher-launched Kubernetes clusters, using the IP of the node with the `controlplane` role and the default Kubernetes self signed certificates. - -For more detail on how an authorized cluster endpoint works and why it is used, refer to the [architecture section.](../../../reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md#4-authorized-cluster-endpoint) - -We recommend using a load balancer with the authorized cluster endpoint. For details, refer to the [recommended architecture section.](../../../reference-guides/rancher-manager-architecture/architecture-recommendations.md#architecture-for-an-authorized-cluster-endpoint) - -### Node Pools - -For information on using the Rancher UI to set up node pools in an RKE cluster, refer to [this page.](../../../pages-for-subheaders/use-new-nodes-in-an-infra-provider.md) - -## Advanced Options - -The following options are available when you create clusters in the Rancher UI. They are located under **Advanced Options.** - -### NGINX Ingress - -Option to enable or disable the [NGINX ingress controller](https://rancher.com/docs/rke/latest/en/config-options/add-ons/ingress-controllers/). - -### Node Port Range - -Option to change the range of ports that can be used for [NodePort services](https://kubernetes.io/docs/concepts/services-networking/service/#nodeport). Default is `30000-32767`. - -### Metrics Server Monitoring - -Option to enable or disable [Metrics Server](https://rancher.com/docs/rke/latest/en/config-options/add-ons/metrics-server/). - -### Pod Security Policy Support - -Option to enable and select a default [Pod Security Policy](../../../how-to-guides/advanced-user-guides/authentication-permissions-and-global-configuration/create-pod-security-policies.md). You must have an existing Pod Security Policy configured before you can use this option. - -### Docker Version on Nodes - -Option to require [a supported Docker version](../../../pages-for-subheaders/installation-requirements.md) installed on the cluster nodes that are added to the cluster, or to allow unsupported Docker versions installed on the cluster nodes. - -### Docker Root Directory - -If the nodes you are adding to the cluster have Docker configured with a non-default Docker Root Directory (default is `/var/lib/docker`), please specify the correct Docker Root Directory in this option. - -### Recurring etcd Snapshots - -Option to enable or disable [recurring etcd snapshots](https://rancher.com/docs/rke/latest/en/etcd-snapshots/#etcd-recurring-snapshots). - -### Agent Environment Variables - -_Available as of v2.5.6_ - -Option to set environment variables for [rancher agents](../../../how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/launch-kubernetes-with-rancher/about-rancher-agents.md). The environment variables can be set using key value pairs. If rancher agent requires use of proxy to communicate with Rancher server, `HTTP_PROXY`, `HTTPS_PROXY` and `NO_PROXY` environment variables can be set using agent environment variables. - - -## Cluster Config File - -Instead of using the Rancher UI to choose Kubernetes options for the cluster, advanced users can create an RKE config file. Using a config file allows you to set any of the [options available](https://rancher.com/docs/rke/latest/en/config-options/) in an RKE installation, except for `system_images` configuration. The `system_images` option is not supported when creating a cluster with the Rancher UI or API. - -- To edit an RKE config file directly from the Rancher UI, click **Edit as YAML**. -- To read from an existing RKE file, click **Read from a file**. - -![image](/img/cluster-options-yaml.png) - -### Config File Structure in Rancher v2.3.0+ - -RKE (Rancher Kubernetes Engine) is the tool that Rancher uses to provision Kubernetes clusters. Rancher's cluster config files used to have the same structure as [RKE config files,](https://rancher.com/docs/rke/latest/en/example-yamls/) but the structure changed so that in Rancher, RKE cluster config items are separated from non-RKE config items. Therefore, configuration for your cluster needs to be nested under the `rancher_kubernetes_engine_config` directive in the cluster config file. Cluster config files created with earlier versions of Rancher will need to be updated for this format. An example cluster config file is included below. - -
- Example Cluster Config File - -```yaml -# -# Cluster Config -# -docker_root_dir: /var/lib/docker -enable_cluster_alerting: false -enable_cluster_monitoring: false -enable_network_policy: false -local_cluster_auth_endpoint: - enabled: true -# -# Rancher Config -# -rancher_kubernetes_engine_config: # Your RKE template config goes here. - addon_job_timeout: 30 - authentication: - strategy: x509 - ignore_docker_version: true -# -# # Currently only nginx ingress provider is supported. -# # To disable ingress controller, set `provider: none` -# # To enable ingress on specific nodes, use the node_selector, eg: -# provider: nginx -# node_selector: -# app: ingress -# - ingress: - provider: nginx - kubernetes_version: v1.15.3-rancher3-1 - monitoring: - provider: metrics-server -# -# If you are using calico on AWS -# -# network: -# plugin: calico -# calico_network_provider: -# cloud_provider: aws -# -# # To specify flannel interface -# -# network: -# plugin: flannel -# flannel_network_provider: -# iface: eth1 -# -# # To specify flannel interface for canal plugin -# -# network: -# plugin: canal -# canal_network_provider: -# iface: eth1 -# - network: - options: - flannel_backend_type: vxlan - plugin: canal -# -# services: -# kube-api: -# service_cluster_ip_range: 10.43.0.0/16 -# kube-controller: -# cluster_cidr: 10.42.0.0/16 -# service_cluster_ip_range: 10.43.0.0/16 -# kubelet: -# cluster_domain: cluster.local -# cluster_dns_server: 10.43.0.10 -# - services: - etcd: - backup_config: - enabled: true - interval_hours: 12 - retention: 6 - safe_timestamp: false - creation: 12h - extra_args: - election-timeout: 5000 - heartbeat-interval: 500 - gid: 0 - retention: 72h - snapshot: false - uid: 0 - kube_api: - always_pull_images: false - pod_security_policy: false - service_node_port_range: 30000-32767 - ssh_agent_auth: false -windows_prefered_cluster: false -``` -
- -### Default DNS provider - -The table below indicates what DNS provider is deployed by default. See [RKE documentation on DNS provider](https://rancher.com/docs/rke/latest/en/config-options/add-ons/dns/) for more information how to configure a different DNS provider. CoreDNS can only be used on Kubernetes v1.12.0 and higher. - -| Rancher version | Kubernetes version | Default DNS provider | -|-------------|--------------------|----------------------| -| v2.2.5 and higher | v1.14.0 and higher | CoreDNS | -| v2.2.5 and higher | v1.13.x and lower | kube-dns | -| v2.2.4 and lower | any | kube-dns | - -## Rancher specific parameters - -Besides the RKE config file options, there are also Rancher specific settings that can be configured in the Config File (YAML): - -### docker_root_dir - -See [Docker Root Directory](#docker-root-directory). - -### enable_cluster_monitoring - -Option to enable or disable [Cluster Monitoring](../../../pages-for-subheaders/monitoring-and-alerting.md). - -### enable_network_policy - -Option to enable or disable Project Network Isolation. - -Before Rancher v2.5.8, project network isolation is only available if you are using the Canal network plugin for RKE. - -In v2.5.8+, project network isolation is available if you are using any RKE network plugin that supports the enforcement of Kubernetes network policies, such as Canal or the Cisco ACI plugin. - -### local_cluster_auth_endpoint - -See [Authorized Cluster Endpoint](#authorized-cluster-endpoint). - -Example: - -```yaml -local_cluster_auth_endpoint: - enabled: true - fqdn: "FQDN" - ca_certs: "BASE64_CACERT" -``` - -### Custom Network Plug-in - -You can add a custom network plug-in by using the [user-defined add-on functionality](https://rancher.com/docs/rke/latest/en/config-options/add-ons/user-defined-add-ons/) of RKE. You define any add-on that you want deployed after the Kubernetes cluster is deployed. - -There are two ways that you can specify an add-on: - -- [In-line Add-ons](https://rancher.com/docs/rke/latest/en/config-options/add-ons/user-defined-add-ons/#in-line-add-ons) -- [Referencing YAML Files for Add-ons](https://rancher.com/docs/rke/latest/en/config-options/add-ons/user-defined-add-ons/#referencing-yaml-files-for-add-ons) - -For an example of how to configure a custom network plug-in by editing the `cluster.yml`, refer to the [RKE documentation.](https://rancher.com/docs/rke/latest/en/config-options/add-ons/network-plugins/custom-network-plugin-example) diff --git a/versioned_docs/version-2.5/reference-guides/about-the-api/api-tokens.md b/versioned_docs/version-2.5/reference-guides/about-the-api/api-tokens.md index 2cc866cbe50..1136b4956d1 100644 --- a/versioned_docs/version-2.5/reference-guides/about-the-api/api-tokens.md +++ b/versioned_docs/version-2.5/reference-guides/about-the-api/api-tokens.md @@ -3,7 +3,7 @@ title: API Tokens --- - + By default, some cluster-level API tokens are generated with infinite time-to-live (`ttl=0`). In other words, API tokens with `ttl=0` never expire unless you invalidate them. Tokens are not invalidated by changing a password. diff --git a/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/backup-configuration.md b/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/backup-configuration.md index 6a94ae60a51..12d8c9a053e 100644 --- a/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/backup-configuration.md +++ b/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/backup-configuration.md @@ -3,7 +3,7 @@ title: Backup Configuration --- - + The Backup Create page lets you configure a schedule, enable encryption and specify the storage location for your backups. diff --git a/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/examples.md b/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/examples.md index 1cc04a7938d..610cfab0650 100644 --- a/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/examples.md +++ b/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/examples.md @@ -3,7 +3,7 @@ title: Examples --- - + This section contains examples of Backup and Restore custom resources. diff --git a/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/restore-configuration.md b/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/restore-configuration.md index 3b2f93cc099..a6db2a37239 100644 --- a/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/restore-configuration.md +++ b/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/restore-configuration.md @@ -3,7 +3,7 @@ title: Restore Configuration --- - + The Restore Create page lets you provide details of the backup to restore from diff --git a/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/storage-configuration.md b/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/storage-configuration.md index 3f0e04d0fbb..2a99b969db0 100644 --- a/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/storage-configuration.md +++ b/versioned_docs/version-2.5/reference-guides/backup-restore-configuration/storage-configuration.md @@ -3,7 +3,7 @@ title: Backup Storage Location Configuration --- - + Configure a storage location where all backups are saved by default. You will have the option to override this with each backup, but will be limited to using an S3-compatible object store. diff --git a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md index bd56e50d30e..dc307e21494 100644 --- a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md +++ b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md @@ -3,7 +3,7 @@ title: Logging Best Practices --- - + In this guide, we recommend best practices for cluster-level logging and application logging. diff --git a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md index 20e14e6b9e0..3dbe0bd9c20 100644 --- a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md +++ b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md @@ -3,7 +3,7 @@ title: Monitoring Best Practices --- - + Configuring sensible monitoring and alerting rules is vital for running any production workloads securely and reliably. This is not different when using Kubernetes and Rancher. Fortunately the integrated monitoring and alerting functionality makes this whole process a lot easier. diff --git a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md index 3012223f423..9d24fb3c5db 100644 --- a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md +++ b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md @@ -3,7 +3,7 @@ title: Best Practices for Rancher Managed vSphere Clusters --- - + This guide outlines a reference architecture for provisioning downstream Rancher clusters in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. diff --git a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md index 628bd1c36f9..cdc2183847a 100644 --- a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md +++ b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md @@ -3,7 +3,7 @@ title: Tips for Setting Up Containers --- - + Running well-built containers can greatly impact the overall performance and security of your environment. diff --git a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md index 7251e64930f..87d4f348d3a 100644 --- a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md +++ b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md @@ -3,7 +3,7 @@ title: Installing Rancher in a vSphere Environment --- - + This guide outlines a reference architecture for installing Rancher on an RKE Kubernetes cluster in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. diff --git a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md index a158b49e238..ba971bfde8f 100644 --- a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md +++ b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md @@ -3,7 +3,7 @@ title: Rancher Deployment Strategy --- - + There are two recommended deployment strategies for a Rancher server that manages downstream Kubernetes clusters. Each one has its own pros and cons. Read more about which one would fit best for your use case. diff --git a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md index a5290120701..36a246dc735 100644 --- a/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md +++ b/versioned_docs/version-2.5/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md @@ -3,7 +3,7 @@ title: Tips for Running Rancher --- - + This guide is geared toward use cases where Rancher is used to manage downstream Kubernetes clusters. The high-availability setup is intended to prevent losing access to downstream clusters if the Rancher server is not available. diff --git a/versioned_docs/version-2.5/reference-guides/cli-with-rancher/kubectl-utility.md b/versioned_docs/version-2.5/reference-guides/cli-with-rancher/kubectl-utility.md index ba9782062b7..3ff216dc9fa 100644 --- a/versioned_docs/version-2.5/reference-guides/cli-with-rancher/kubectl-utility.md +++ b/versioned_docs/version-2.5/reference-guides/cli-with-rancher/kubectl-utility.md @@ -3,7 +3,7 @@ title: kubectl Utility --- - + ## kubectl diff --git a/versioned_docs/version-2.5/reference-guides/cli-with-rancher/rancher-cli.md b/versioned_docs/version-2.5/reference-guides/cli-with-rancher/rancher-cli.md index cd762cd7368..fbf757d7f43 100644 --- a/versioned_docs/version-2.5/reference-guides/cli-with-rancher/rancher-cli.md +++ b/versioned_docs/version-2.5/reference-guides/cli-with-rancher/rancher-cli.md @@ -4,7 +4,7 @@ description: Interact with Rancher using command line interface (CLI) tools from --- - + The Rancher CLI (Command Line Interface) is a unified tool that you can use to interact with Rancher. With this tool, you can operate Rancher using a command line rather than the GUI. diff --git a/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md b/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md index ad127081b1a..5d6ee5eb8c8 100644 --- a/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md +++ b/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md @@ -3,7 +3,7 @@ title: EC2 Node Template Configuration --- - + For more details about EC2, nodes, refer to the official documentation for the [EC2 Management Console](https://aws.amazon.com/ec2). diff --git a/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md b/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md index 5b529bb37aa..bfe53fc1835 100644 --- a/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md +++ b/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md @@ -3,7 +3,7 @@ title: Azure Node Template Configuration --- - + For more information about Azure, refer to the official [Azure documentation.](https://docs.microsoft.com/en-us/azure/?product=featured) diff --git a/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md b/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md index 584a6b14437..d4e70a8fc12 100644 --- a/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md +++ b/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md @@ -3,7 +3,7 @@ title: DigitalOcean Node Template Configuration --- - + Account access information is stored as a cloud credential. Cloud credentials are stored as Kubernetes secrets. Multiple node templates can use the same cloud credential. You can use an existing cloud credential or create a new one. diff --git a/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md b/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md index 015f6eda551..49afe925b82 100644 --- a/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md +++ b/versioned_docs/version-2.5/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md @@ -3,7 +3,7 @@ title: VSphere Node Template Configuration --- - + The following node template configuration reference applies to Rancher v2.3.3+. diff --git a/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md b/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md index 4964d9cf4c0..6861ccbee5c 100644 --- a/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md +++ b/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md @@ -3,7 +3,7 @@ title: EKS Cluster Configuration Reference --- - + diff --git a/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md b/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md index db4cb75d76d..103cf012ccb 100644 --- a/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md +++ b/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md @@ -3,7 +3,7 @@ title: Private Clusters --- - + _Available as of v2.5.8_ diff --git a/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md b/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md index 659bc58eefa..2cbaa955b68 100644 --- a/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md +++ b/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md @@ -3,7 +3,7 @@ title: Syncing --- - + Syncing is the feature for EKS and GKE clusters that causes Rancher to update the clusters' values so they are up to date with their corresponding cluster object in the hosted Kubernetes provider. This enables Rancher to not be the sole owner of a hosted cluster’s state. Its largest limitation is that processing an update from Rancher and another source at the same time or within 5 minutes of one finishing may cause the state from one source to completely overwrite the other. diff --git a/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md b/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md index a0e092fee87..3c363d053cf 100644 --- a/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md +++ b/versioned_docs/version-2.5/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md @@ -3,7 +3,7 @@ title: Rancher Agent Options --- - + Rancher deploys an agent on each node to communicate with the node. This pages describes the options that can be passed to the agent. To use these options, you will need to [create a cluster with custom nodes](../../../../pages-for-subheaders/use-existing-nodes.md) and add the options to the generated `docker run` command when adding a node. diff --git a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/examples.md b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/examples.md index 7c586657eb2..c65722cfa97 100644 --- a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/examples.md +++ b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/examples.md @@ -3,7 +3,7 @@ title: Examples --- - + ### ServiceMonitor diff --git a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/helm-chart-options.md b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/helm-chart-options.md index 0a0cb764e2b..fb2f68e6460 100644 --- a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/helm-chart-options.md +++ b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/helm-chart-options.md @@ -3,7 +3,7 @@ title: Helm Chart Options --- - + ## Configuring Resource Limits and Requests diff --git a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/receivers.md b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/receivers.md index a3e33a76e18..bfe2f5ac7df 100644 --- a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/receivers.md +++ b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/receivers.md @@ -3,7 +3,7 @@ title: Receiver Configuration --- - + The [Alertmanager Config](https://prometheus.io/docs/alerting/latest/configuration/#configuration-file) Secret contains the configuration of an Alertmanager instance that sends out notifications based on alerts it receives from Prometheus. diff --git a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/routes.md b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/routes.md index 9115fbced37..62e68e8bc53 100644 --- a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/routes.md +++ b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/routes.md @@ -3,7 +3,7 @@ title: Route Configuration --- - + The route configuration is the section of the Alertmanager custom resource that controls how the alerts fired by Prometheus are grouped and filtered before they reach the receiver. diff --git a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md index c46c7970881..6e7150b1105 100644 --- a/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md +++ b/versioned_docs/version-2.5/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md @@ -3,7 +3,7 @@ title: ServiceMonitor and PodMonitor Configuration --- - + ServiceMonitors and PodMonitors are both pseudo-CRDs that map the scrape configuration of the Prometheus custom resource. diff --git a/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/architecture-recommendations.md b/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/architecture-recommendations.md index b0a4a11590e..14230cf82dd 100644 --- a/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/architecture-recommendations.md +++ b/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/architecture-recommendations.md @@ -2,6 +2,10 @@ title: Architecture Recommendations --- + + + + Kubernetes cluster. If you are installing Rancher on a single node, the main architecture recommendation that applies to your installation is that the node running Rancher should be [separate from downstream clusters.](#separation-of-rancher-and-user-clusters) ## Separation of Rancher and User Clusters diff --git a/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md b/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md index b676e11d6ee..71a22d20698 100644 --- a/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md +++ b/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md @@ -2,6 +2,10 @@ title: Communicating with Downstream User Clusters --- + + + + This section describes how Rancher provisions and manages the downstream user clusters that run your apps and services. The below diagram shows how the cluster controllers, cluster agents, and node agents allow Rancher to control downstream clusters. diff --git a/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/rancher-server-and-components.md b/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/rancher-server-and-components.md index edb00a9424c..c7092bcec23 100644 --- a/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/rancher-server-and-components.md +++ b/versioned_docs/version-2.5/reference-guides/rancher-manager-architecture/rancher-server-and-components.md @@ -2,6 +2,10 @@ title: Rancher Server and Components --- + + + + The majority of Rancher 2.x software runs on the Rancher Server. Rancher Server includes all the software components used to manage the entire Rancher deployment. The figure below illustrates the high-level architecture of Rancher 2.x. The figure depicts a Rancher Server installation that manages two downstream Kubernetes clusters: one created by RKE and another created by Amazon EKS (Elastic Kubernetes Service). diff --git a/versioned_docs/version-2.5/reference-guides/rancher-security/kubernetes-security-best-practices.md b/versioned_docs/version-2.5/reference-guides/rancher-security/kubernetes-security-best-practices.md index a863dd44e52..ace8bd95fab 100644 --- a/versioned_docs/version-2.5/reference-guides/rancher-security/kubernetes-security-best-practices.md +++ b/versioned_docs/version-2.5/reference-guides/rancher-security/kubernetes-security-best-practices.md @@ -2,6 +2,10 @@ title: Kubernetes Security Best Practices --- + + + + ### Restricting cloud metadata API access Cloud providers such as AWS, Azure, DigitalOcean or GCP often expose metadata services locally to instances. By default, this endpoint is accessible by pods running on a cloud instance, including pods in hosted Kubernetes providers such as EKS, AKS, DigitalOcean Kubernetes or GKE, and can contain cloud credentials for that node, provisioning data such as kubelet credentials, or other sensitive data. To mitigate this risk when running on a cloud platform, follow the [Kubernetes security recommendations](https://kubernetes.io/docs/tasks/administer-cluster/securing-a-cluster/#restricting-cloud-metadata-api-access): limit permissions given to instance credentials, use network policies to restrict pod access to the metadata API, and avoid using provisioning data to deliver secrets. diff --git a/versioned_docs/version-2.5/reference-guides/rancher-security/security-advisories-and-cves.md b/versioned_docs/version-2.5/reference-guides/rancher-security/security-advisories-and-cves.md index c24aef100b4..0c9b9ed016a 100644 --- a/versioned_docs/version-2.5/reference-guides/rancher-security/security-advisories-and-cves.md +++ b/versioned_docs/version-2.5/reference-guides/rancher-security/security-advisories-and-cves.md @@ -2,6 +2,10 @@ title: Security Advisories and CVEs --- + + + + Rancher is committed to informing the community of security issues in our products. Rancher will publish security advisories and CVEs (Common Vulnerabilities and Exposures) for issues we have resolved. New security advisories are also published in Rancher's GitHub [security page](https://github.com/rancher/rancher/security/advisories). | ID | Description | Date | Resolution | diff --git a/versioned_docs/version-2.5/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md b/versioned_docs/version-2.5/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md index d7358c29b62..1d9d46c75d4 100644 --- a/versioned_docs/version-2.5/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md +++ b/versioned_docs/version-2.5/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md @@ -2,6 +2,10 @@ title: About rancher-selinux --- + + + + To allow Rancher to work with SELinux, some functionality has to be manually enabled for the SELinux nodes. To help with that, Rancher provides a SELinux RPM. The `rancher-selinux` RPM only contains policies for the [rancher-logging application.](https://github.com/rancher/charts/tree/dev-v2.5/charts/rancher-logging) diff --git a/versioned_docs/version-2.5/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md b/versioned_docs/version-2.5/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md index fe124221e5f..c5edf5e0017 100644 --- a/versioned_docs/version-2.5/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md +++ b/versioned_docs/version-2.5/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md @@ -2,6 +2,10 @@ title: About rke2-selinux --- + + + + `rke2-selinux` provides policies for RKE2. It is installed automatically when the RKE2 installer script detects that it is running on an RPM-based distro. The `rke2-selinux` GitHub repository is [here.](https://github.com/rancher/rke2-selinux) diff --git a/versioned_docs/version-2.6/backups/docker-installs/docker-installs.md b/versioned_docs/version-2.6/backups/docker-installs/docker-installs.md deleted file mode 100644 index cc211cee5e0..00000000000 --- a/versioned_docs/version-2.6/backups/docker-installs/docker-installs.md +++ /dev/null @@ -1,6 +0,0 @@ ---- -title: Backup and Restore for Rancher Installed with Docker ---- - -- [Backups](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/back-up-docker-installed-rancher.md) -- [Restores](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-docker-installed-rancher.md) \ No newline at end of file diff --git a/versioned_docs/version-2.6/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md b/versioned_docs/version-2.6/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md index b74d1d7d4e9..a4e4f9e0771 100644 --- a/versioned_docs/version-2.6/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md +++ b/versioned_docs/version-2.6/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md @@ -113,20 +113,23 @@ This reference contains variables that you can use in `questions.yml` nested und | label | string | true | Define the UI label. | | description | string | false | Specify the description of the variable.| | type | string | false | Default to `string` if not specified (current supported types are string, multiline, boolean, int, enum, password, storageclass, hostname, pvc, and secret).| -| required | bool | false | Define if the variable is required or not (true \| false)| | default | string | false | Specify the default value. Only used if there is no corresponding value in the `values.yml` file. | | group | string | false | Group questions by input value. | -| min_length | int | false | Min character length.| -| max_length | int | false | Max character length.| -| min | int | false | Min integer length. | -| max | int | false | Max integer length. | | options | []string | false | Specify the options when the variable type is `enum`, for example: options:
- "ClusterIP"
- "NodePort"
- "LoadBalancer"| -| valid_chars | string | false | Regular expression for input chars validation. | -| invalid_chars | string | false | Regular expression for invalid input chars validation.| | subquestions | []subquestion | false| Add an array of subquestions.| | show_if | string | false | Show current variable if conditional variable is true. For example `show_if: "serviceType=Nodeport"` | | show\_subquestion_if | string | false | Show subquestions if is true or equal to one of the options. for example `show_subquestion_if: "true"`| + + :::note `subquestions[]` cannot contain `subquestions` or `show_subquestions_if` keys, but all other keys in the above table are supported. diff --git a/versioned_docs/version-2.6/reference-guides/about-the-api/api-tokens.md b/versioned_docs/version-2.6/reference-guides/about-the-api/api-tokens.md index 143964542e8..0d813665761 100644 --- a/versioned_docs/version-2.6/reference-guides/about-the-api/api-tokens.md +++ b/versioned_docs/version-2.6/reference-guides/about-the-api/api-tokens.md @@ -3,7 +3,7 @@ title: API Tokens --- - + By default, some cluster-level API tokens are generated with infinite time-to-live (`ttl=0`). In other words, API tokens with `ttl=0` never expire unless you invalidate them. Tokens are not invalidated by changing a password. diff --git a/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/backup-configuration.md b/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/backup-configuration.md index 2a792778e0a..e7ef2b056bf 100644 --- a/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/backup-configuration.md +++ b/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/backup-configuration.md @@ -3,7 +3,7 @@ title: Backup Configuration --- - + The Backup Create page lets you configure a schedule, enable encryption and specify the storage location for your backups. diff --git a/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/examples.md b/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/examples.md index 4336a204d98..bab7533302e 100644 --- a/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/examples.md +++ b/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/examples.md @@ -3,7 +3,7 @@ title: Examples --- - + This section contains examples of Backup and Restore custom resources. diff --git a/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/restore-configuration.md b/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/restore-configuration.md index 5e958fcd674..b162a6ef873 100644 --- a/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/restore-configuration.md +++ b/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/restore-configuration.md @@ -3,7 +3,7 @@ title: Restore Configuration --- - + The Restore Create page lets you provide details of the backup to restore from diff --git a/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/storage-configuration.md b/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/storage-configuration.md index 3ad8b94487f..b1b8bad0896 100644 --- a/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/storage-configuration.md +++ b/versioned_docs/version-2.6/reference-guides/backup-restore-configuration/storage-configuration.md @@ -3,7 +3,7 @@ title: Backup Storage Location Configuration --- - + Configure a storage location where all backups are saved by default. You will have the option to override this with each backup, but will be limited to using an S3-compatible object store. diff --git a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md index 9fc13c9ce70..dc200ae62b1 100644 --- a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md +++ b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md @@ -3,7 +3,7 @@ title: Logging Best Practices --- - + In this guide, we recommend best practices for cluster-level logging and application logging. diff --git a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md index 820cfae1e49..35f8af067e4 100644 --- a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md +++ b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md @@ -3,7 +3,7 @@ title: Monitoring Best Practices --- - + Configuring sensible monitoring and alerting rules is vital for running any production workloads securely and reliably. This is not different when using Kubernetes and Rancher. Fortunately the integrated monitoring and alerting functionality makes this whole process a lot easier. diff --git a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md index 3012223f423..9d24fb3c5db 100644 --- a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md +++ b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md @@ -3,7 +3,7 @@ title: Best Practices for Rancher Managed vSphere Clusters --- - + This guide outlines a reference architecture for provisioning downstream Rancher clusters in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. diff --git a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md index 1298ff18b87..0cec0a91864 100644 --- a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md +++ b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md @@ -3,7 +3,7 @@ title: Tips for Setting Up Containers --- - + Running well-built containers can greatly impact the overall performance and security of your environment. diff --git a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md index c19ac243d98..74243559753 100644 --- a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md +++ b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md @@ -3,7 +3,7 @@ title: Installing Rancher in a vSphere Environment --- - + This guide outlines a reference architecture for installing Rancher on an RKE Kubernetes cluster in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. diff --git a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md index cc8811dc77e..99583f75579 100644 --- a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md +++ b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md @@ -3,7 +3,7 @@ title: Rancher Deployment Strategy --- - + There are two recommended deployment strategies for a Rancher instance that manages downstream Kubernetes clusters. Each one has its own pros and cons. Read more about which one would fit best for your use case. diff --git a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md index 1863ff82503..1ed05696fa2 100644 --- a/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md +++ b/versioned_docs/version-2.6/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md @@ -3,7 +3,7 @@ title: Tips for Running Rancher --- - + This guide is geared toward use cases where Rancher is used to manage downstream Kubernetes clusters. The high-availability setup is intended to prevent losing access to downstream clusters if the Rancher server is not available. diff --git a/versioned_docs/version-2.6/reference-guides/cli-with-rancher/kubectl-utility.md b/versioned_docs/version-2.6/reference-guides/cli-with-rancher/kubectl-utility.md index 45502753a08..fefa1a66b1b 100644 --- a/versioned_docs/version-2.6/reference-guides/cli-with-rancher/kubectl-utility.md +++ b/versioned_docs/version-2.6/reference-guides/cli-with-rancher/kubectl-utility.md @@ -3,7 +3,7 @@ title: kubectl Utility --- - + ## kubectl diff --git a/versioned_docs/version-2.6/reference-guides/cli-with-rancher/rancher-cli.md b/versioned_docs/version-2.6/reference-guides/cli-with-rancher/rancher-cli.md index f647eca1163..445d2b6446b 100644 --- a/versioned_docs/version-2.6/reference-guides/cli-with-rancher/rancher-cli.md +++ b/versioned_docs/version-2.6/reference-guides/cli-with-rancher/rancher-cli.md @@ -4,7 +4,7 @@ description: Interact with Rancher using command line interface (CLI) tools from --- - + The Rancher CLI (Command Line Interface) is a unified tool that you can use to interact with Rancher. With this tool, you can operate Rancher using a command line rather than the GUI. diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md index 6043df8f1ba..4640d142697 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md @@ -3,7 +3,7 @@ title: EC2 Machine Configuration Reference --- - + For more details about EC2 nodes, refer to the official documentation for the [EC2 Management Console](https://aws.amazon.com/ec2). diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md index 98d299762b0..ba7e806295e 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md @@ -3,7 +3,7 @@ title: Azure Machine Configuration --- - + For more information about Azure, refer to the official [Azure documentation.](https://docs.microsoft.com/en-us/azure/?product=featured) diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md index 1d62fe9d9d7..634c7f48561 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md @@ -3,7 +3,7 @@ title: DigitalOcean Machine Configuration --- - + For more details about DigitalOcean, Droplets, refer to the [official documentation](https://docs.digitalocean.com/products/compute/). diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md index 2589d800c95..78bdc608163 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md @@ -3,7 +3,7 @@ title: EC2 Node Template Configuration --- - + For more details about EC2, nodes, refer to the official documentation for the [EC2 Management Console](https://aws.amazon.com/ec2). diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md index 8dcfd402deb..80f266d590b 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md @@ -3,7 +3,7 @@ title: Azure Node Template Configuration --- - + For more information about Azure, refer to the official [Azure documentation.](https://docs.microsoft.com/en-us/azure/?product=featured) diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md index 584a6b14437..d4e70a8fc12 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md @@ -3,7 +3,7 @@ title: DigitalOcean Node Template Configuration --- - + Account access information is stored as a cloud credential. Cloud credentials are stored as Kubernetes secrets. Multiple node templates can use the same cloud credential. You can use an existing cloud credential or create a new one. diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md index ff68438637c..e3294c0c885 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md @@ -3,7 +3,7 @@ title: Nutanix Node Template Configuration --- - + ## Account Access diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md index 159248fc1c6..baae6beac1a 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md @@ -3,7 +3,7 @@ title: VSphere Node Template Configuration --- - + ## Account Access diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md index 136c71a45a2..67cd280e470 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md @@ -3,7 +3,7 @@ title: AKS Cluster Configuration Reference --- - + ## Changes in Rancher v2.6 diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md index 49d7e9d38f3..d9fe3d29059 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md @@ -3,7 +3,7 @@ title: EKS Cluster Configuration Reference --- - + ### Account Access diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md index c6d7893c7ae..0df4836a237 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md @@ -3,7 +3,7 @@ title: Private Clusters --- - + In GKE, [private clusters](https://cloud.google.com/kubernetes-engine/docs/concepts/private-cluster-concept) are clusters whose nodes are isolated from inbound and outbound traffic by assigning them internal IP addresses only. Private clusters in GKE have the option of exposing the control plane endpoint as a publicly accessible address or as a private address. This is different from other Kubernetes providers, which may refer to clusters with private control plane endpoints as "private clusters" but still allow traffic to and from nodes. You may want to create a cluster with private nodes, with or without a public control plane endpoint, depending on your organization's networking and security requirements. A GKE cluster provisioned from Rancher can use isolated nodes by selecting "Private Cluster" in the Cluster Options (under "Show advanced options"). The control plane endpoint can optionally be made private by selecting "Enable Private Endpoint". diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md index 0b6e10c248c..a9a02deaaef 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md @@ -127,7 +127,7 @@ ACE is available on Kubernetes clusters provisioned by or registered with Ranche ::: -ACE must be set up [manually](../../../how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/register-existing-clusters#authorized-cluster-endpoint-support-for-rke2-and-k3s-clusters.md) on RKE2 and K3s clusters in Rancher v2.6.3 and later. In RKE, ACE is enabled by default in Rancher-launched Kubernetes clusters, using the IP of the node with the `controlplane` role and the default Kubernetes self-signed certificates. +ACE must be set up [manually](../../../how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/register-existing-clusters.md#authorized-cluster-endpoint-support-for-rke2-and-k3s-clusters) on RKE2 and K3s clusters in Rancher v2.6.3 and later. In RKE, ACE is enabled by default in Rancher-launched Kubernetes clusters, using the IP of the node with the `controlplane` role and the default Kubernetes self-signed certificates. For more detail on how an authorized cluster endpoint works and why it is used, refer to the [architecture section.](../../../reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md#4-authorized-cluster-endpoint) diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md index 7d8916c6785..51f9d04929c 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md @@ -3,7 +3,7 @@ title: Syncing --- - + Syncing allows Rancher to update cluster values so that they're up to date with the corresponding cluster object hosted in AKS, EKS or GKE. This enables sources other than Rancher to own a hosted cluster’s state. diff --git a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md index a0e092fee87..3c363d053cf 100644 --- a/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md +++ b/versioned_docs/version-2.6/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md @@ -3,7 +3,7 @@ title: Rancher Agent Options --- - + Rancher deploys an agent on each node to communicate with the node. This pages describes the options that can be passed to the agent. To use these options, you will need to [create a cluster with custom nodes](../../../../pages-for-subheaders/use-existing-nodes.md) and add the options to the generated `docker run` command when adding a node. diff --git a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/examples.md b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/examples.md index 7c586657eb2..c65722cfa97 100644 --- a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/examples.md +++ b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/examples.md @@ -3,7 +3,7 @@ title: Examples --- - + ### ServiceMonitor diff --git a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/helm-chart-options.md b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/helm-chart-options.md index fabd9fc222f..112c41c9ea0 100644 --- a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/helm-chart-options.md +++ b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/helm-chart-options.md @@ -3,7 +3,7 @@ title: Helm Chart Options --- - + ## Configuring Resource Limits and Requests diff --git a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/receivers.md b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/receivers.md index b14f320a3ee..631e589009c 100644 --- a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/receivers.md +++ b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/receivers.md @@ -3,7 +3,7 @@ title: Receiver Configuration --- - + The [Alertmanager Config](https://prometheus.io/docs/alerting/latest/configuration/#configuration-file) Secret contains the configuration of an Alertmanager instance that sends out notifications based on alerts it receives from Prometheus. diff --git a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/routes.md b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/routes.md index 38e29ec82a0..9fb4e3896e6 100644 --- a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/routes.md +++ b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/routes.md @@ -3,7 +3,7 @@ title: Route Configuration --- - + The route configuration is the section of the Alertmanager custom resource that controls how the alerts fired by Prometheus are grouped and filtered before they reach the receiver. diff --git a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md index 780d13c2673..30fccb634c8 100644 --- a/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md +++ b/versioned_docs/version-2.6/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md @@ -3,7 +3,7 @@ title: ServiceMonitor and PodMonitor Configuration --- - + ServiceMonitors and PodMonitors are both pseudo-CRDs that map the scrape configuration of the Prometheus custom resource. diff --git a/versioned_docs/version-2.6/reference-guides/prometheus-federator/rbac.md b/versioned_docs/version-2.6/reference-guides/prometheus-federator/rbac.md index 47887415d85..8b54ce9559f 100644 --- a/versioned_docs/version-2.6/reference-guides/prometheus-federator/rbac.md +++ b/versioned_docs/version-2.6/reference-guides/prometheus-federator/rbac.md @@ -2,6 +2,10 @@ title: Role-Based Access Control --- + + + + This section describes the expectations for Role-Based Access Control (RBAC) for Prometheus Federator. As described in the section on [namespaces](../../pages-for-subheaders/prometheus-federator.md#namespaces), Prometheus Federator expects that Project Owners, Project Members, and other users in the cluster with Project-level permissions (e.g. permissions in a certain set of namespaces identified by a single label selector) have minimal permissions in any namespaces except the Project Registration Namespace (which is imported into the project by default) and those that already comprise their projects. Therefore, in order to allow Project Owners to assign specific chart permissions to other users in their Project namespaces, the Helm Project Operator will automatically watch the following bindings: diff --git a/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/architecture-recommendations.md b/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/architecture-recommendations.md index 0440180b112..8940a45f8c1 100644 --- a/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/architecture-recommendations.md +++ b/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/architecture-recommendations.md @@ -2,6 +2,10 @@ title: Architecture Recommendations --- + + + + If you are installing Rancher on a single node, the main architecture recommendation that applies to your installation is that the node running Rancher should be [separate from downstream clusters.](#separation-of-rancher-and-user-clusters) ## Separation of Rancher and User Clusters diff --git a/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md b/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md index 0c5b83a3ffe..586b55b0db8 100644 --- a/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md +++ b/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md @@ -2,6 +2,10 @@ title: Communicating with Downstream User Clusters --- + + + + This section describes how Rancher provisions and manages the downstream user clusters that run your apps and services. The below diagram shows how the cluster controllers, cluster agents, and node agents allow Rancher to control downstream clusters. diff --git a/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/rancher-server-and-components.md b/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/rancher-server-and-components.md index 7a588ac91b3..9d25e318ee3 100644 --- a/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/rancher-server-and-components.md +++ b/versioned_docs/version-2.6/reference-guides/rancher-manager-architecture/rancher-server-and-components.md @@ -2,6 +2,10 @@ title: Rancher Server and Components --- + + + + The majority of Rancher 2.x software runs on the Rancher Server. Rancher Server includes all the software components used to manage the entire Rancher deployment. The figure below illustrates the high-level architecture of Rancher 2.x. The figure depicts a Rancher Server installation that manages two downstream Kubernetes clusters: one created by RKE and another created by Amazon EKS (Elastic Kubernetes Service). diff --git a/versioned_docs/version-2.6/reference-guides/rancher-security/kubernetes-security-best-practices.md b/versioned_docs/version-2.6/reference-guides/rancher-security/kubernetes-security-best-practices.md index a863dd44e52..ace8bd95fab 100644 --- a/versioned_docs/version-2.6/reference-guides/rancher-security/kubernetes-security-best-practices.md +++ b/versioned_docs/version-2.6/reference-guides/rancher-security/kubernetes-security-best-practices.md @@ -2,6 +2,10 @@ title: Kubernetes Security Best Practices --- + + + + ### Restricting cloud metadata API access Cloud providers such as AWS, Azure, DigitalOcean or GCP often expose metadata services locally to instances. By default, this endpoint is accessible by pods running on a cloud instance, including pods in hosted Kubernetes providers such as EKS, AKS, DigitalOcean Kubernetes or GKE, and can contain cloud credentials for that node, provisioning data such as kubelet credentials, or other sensitive data. To mitigate this risk when running on a cloud platform, follow the [Kubernetes security recommendations](https://kubernetes.io/docs/tasks/administer-cluster/securing-a-cluster/#restricting-cloud-metadata-api-access): limit permissions given to instance credentials, use network policies to restrict pod access to the metadata API, and avoid using provisioning data to deliver secrets. diff --git a/versioned_docs/version-2.6/reference-guides/rancher-security/security-advisories-and-cves.md b/versioned_docs/version-2.6/reference-guides/rancher-security/security-advisories-and-cves.md index a89a75fd09e..b7dec08a23e 100644 --- a/versioned_docs/version-2.6/reference-guides/rancher-security/security-advisories-and-cves.md +++ b/versioned_docs/version-2.6/reference-guides/rancher-security/security-advisories-and-cves.md @@ -2,6 +2,10 @@ title: Security Advisories and CVEs --- + + + + Rancher is committed to informing the community of security issues in our products. Rancher will publish security advisories and CVEs (Common Vulnerabilities and Exposures) for issues we have resolved. New security advisories are also published in Rancher's GitHub [security page](https://github.com/rancher/rancher/security/advisories). | ID | Description | Date | Resolution | diff --git a/versioned_docs/version-2.6/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md b/versioned_docs/version-2.6/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md index d7358c29b62..1d9d46c75d4 100644 --- a/versioned_docs/version-2.6/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md +++ b/versioned_docs/version-2.6/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md @@ -2,6 +2,10 @@ title: About rancher-selinux --- + + + + To allow Rancher to work with SELinux, some functionality has to be manually enabled for the SELinux nodes. To help with that, Rancher provides a SELinux RPM. The `rancher-selinux` RPM only contains policies for the [rancher-logging application.](https://github.com/rancher/charts/tree/dev-v2.5/charts/rancher-logging) diff --git a/versioned_docs/version-2.6/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md b/versioned_docs/version-2.6/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md index fe124221e5f..c5edf5e0017 100644 --- a/versioned_docs/version-2.6/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md +++ b/versioned_docs/version-2.6/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md @@ -2,6 +2,10 @@ title: About rke2-selinux --- + + + + `rke2-selinux` provides policies for RKE2. It is installed automatically when the RKE2 installer script detects that it is running on an RPM-based distro. 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[Backups](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/back-up-docker-installed-rancher.md) -- [Restores](../../how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-docker-installed-rancher.md) \ No newline at end of file diff --git a/versioned_docs/version-2.7/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md b/versioned_docs/version-2.7/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md index bc5cc83d471..300e152bb22 100644 --- a/versioned_docs/version-2.7/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md +++ b/versioned_docs/version-2.7/how-to-guides/new-user-guides/helm-charts-in-rancher/create-apps.md @@ -109,20 +109,23 @@ This reference contains variables that you can use in `questions.yml` nested und | label | string | true | Define the UI label. | | description | string | false | Specify the description of the variable.| | type | string | false | Default to `string` if not specified (current supported types are string, multiline, boolean, int, enum, password, storageclass, hostname, pvc, and secret).| -| required | bool | false | Define if the variable is required or not (true \| false)| | default | string | false | Specify the default value. Only used if there is no corresponding value in the `values.yml` file. | | group | string | false | Group questions by input value. | -| min_length | int | false | Min character length.| -| max_length | int | false | Max character length.| -| min | int | false | Min integer length. | -| max | int | false | Max integer length. | | options | []string | false | Specify the options when the variable type is `enum`, for example: options:
- "ClusterIP"
- "NodePort"
- "LoadBalancer"| -| valid_chars | string | false | Regular expression for input chars validation. | -| invalid_chars | string | false | Regular expression for invalid input chars validation.| | subquestions | []subquestion | false| Add an array of subquestions.| | show_if | string | false | Show current variable if conditional variable is true. For example `show_if: "serviceType=Nodeport"` | | show\_subquestion_if | string | false | Show subquestions if is true or equal to one of the options. for example `show_subquestion_if: "true"`| + + :::note `subquestions[]` cannot contain `subquestions` or `show_subquestions_if` keys, but all other keys in the above table are supported. diff --git a/versioned_docs/version-2.7/how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/set-up-clusters-from-hosted-kubernetes-providers/aks.md b/versioned_docs/version-2.7/how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/set-up-clusters-from-hosted-kubernetes-providers/aks.md index b65d7aa9b4b..f176acc177b 100644 --- a/versioned_docs/version-2.7/how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/set-up-clusters-from-hosted-kubernetes-providers/aks.md +++ b/versioned_docs/version-2.7/how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/set-up-clusters-from-hosted-kubernetes-providers/aks.md @@ -8,7 +8,6 @@ title: Creating an AKS Cluster You can use Rancher to create a cluster hosted in Microsoft Azure Kubernetes Service (AKS). - ## Prerequisites in Microsoft Azure :::caution @@ -65,6 +64,14 @@ az ad sp create-for-rbac \ --role Contributor ``` +### Setting Up the Service Principal with the Azure Command Line Tool + +Create the Resource Group by running this command: + +``` +az group create --location AZURE_LOCATION_NAME --resource-group AZURE_RESOURCE_GROUP_NAME +``` + ### Setting Up the Service Principal from the Azure Portal You can also follow these instructions to set up a service principal and give it role-based access from the Azure Portal. @@ -124,6 +131,17 @@ When provisioning an AKS cluster in the Rancher UI, RBAC is not configurable bec RBAC is required for AKS clusters that are registered or imported into Rancher. +### Setting Up the Role Assignment to Service Principal with the Azure Command Line Tool + +Assign the Rancher AKSv2 role to the service principal with the Azure Command Line Tool: + +``` +az role assignment create \ +--assignee CLIENT_ID \ +--scope "/subscriptions/SUBSCRIPTION_ID/resourceGroups/RESOURCE_GROUP_NAME" \ +--role "Rancher AKSv2" +``` + ## AKS Cluster Configuration Reference For more information about how to configure AKS clusters from the Rancher UI, see the [configuration reference.](../../../../reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md) @@ -146,12 +164,114 @@ Please be aware that when registering an existing AKS cluster, the cluster might For more information about connecting to an AKS private cluster, see the [AKS documentation.](https://docs.microsoft.com/en-us/azure/aks/private-clusters#options-for-connecting-to-the-private-cluster) +## Setting Up the Minimum Permission Role with the Azure Command Line Tool + +1. Create the Minimum Rancher AKSv2 Permission Role by running this command: + + ``` + cat >> rancher-azure.json << EOF + + { + "Name": "Rancher AKSv2", + "IsCustom": true, + "Description": "Everything needed by Rancher AKSv2 operator", + "Actions": [ + "Microsoft.Compute/disks/delete", + "Microsoft.Compute/disks/read", + "Microsoft.Compute/disks/write", + "Microsoft.Compute/diskEncryptionSets/read", + "Microsoft.Compute/locations/DiskOperations/read", + "Microsoft.Compute/locations/vmSizes/read", + "Microsoft.Compute/locations/operations/read", + "Microsoft.Compute/proximityPlacementGroups/write", + "Microsoft.Compute/snapshots/delete", + "Microsoft.Compute/snapshots/read", + "Microsoft.Compute/snapshots/write", + "Microsoft.Compute/virtualMachineScaleSets/manualUpgrade/action", + "Microsoft.Compute/virtualMachineScaleSets/delete", + "Microsoft.Compute/virtualMachineScaleSets/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/networkInterfaces/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/networkInterfaces/ipconfigurations/publicipaddresses/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualmachines/instanceView/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/read", + "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/write", + "Microsoft.Compute/virtualMachineScaleSets/write", + "Microsoft.Compute/virtualMachines/read", + "Microsoft.Compute/virtualMachines/write", + "Microsoft.ContainerService/managedClusters/read", + "Microsoft.ContainerService/managedClusters/write" + "Microsoft.ContainerService/managedClusters/delete", + "Microsoft.ContainerService/managedClusters/accessProfiles/listCredential/action", + "Microsoft.ContainerService/managedClusters/agentPools/read", + "Microsoft.ContainerService/managedClusters/agentPools/write", + "Microsoft.ManagedIdentity/userAssignedIdentities/assign/action", + "Microsoft.Network/applicationGateways/read", + "Microsoft.Network/applicationGateways/write", + "Microsoft.Network/loadBalancers/write", + "Microsoft.Network/loadBalancers/backendAddressPools/join/action", + "Microsoft.Network/loadBalancers/delete", + "Microsoft.Network/loadBalancers/read", + "Microsoft.Network/networkInterfaces/join/action", + "Microsoft.Network/networkInterfaces/read", + "Microsoft.Network/networkInterfaces/write", + "Microsoft.Network/networkSecurityGroups/read", + "Microsoft.Network/networkSecurityGroups/write", + "Microsoft.Network/publicIPAddresses/delete", + "Microsoft.Network/publicIPAddresses/join/action", + "Microsoft.Network/publicIPAddresses/read", + "Microsoft.Network/publicIPAddresses/write", + "Microsoft.Network/publicIPPrefixes/join/action", + "Microsoft.Network/privatednszones/*", + "Microsoft.Network/routeTables/read", + "Microsoft.Network/routeTables/routes/delete", + "Microsoft.Network/routeTables/routes/read", + "Microsoft.Network/routeTables/routes/write", + "Microsoft.Network/routeTables/write", + "Microsoft.Network/virtualNetworks/read", + "Microsoft.Network/virtualNetworks/subnets/join/action", + "Microsoft.Network/virtualNetworks/subnets/read", + "Microsoft.Network/virtualNetworks/joinLoadBalancer/action", + "Microsoft.OperationalInsights/workspaces/sharedkeys/read", + "Microsoft.OperationalInsights/workspaces/read", + "Microsoft.OperationsManagement/solutions/write", + "Microsoft.OperationsManagement/solutions/read", + "Microsoft.Resources/subscriptions/resourcegroups/read", + "Microsoft.Resources/subscriptions/resourcegroups/write", + "Microsoft.Storage/operations/read", + "Microsoft.Storage/storageAccounts/listKeys/action", + "Microsoft.Storage/storageAccounts/delete", + "Microsoft.Storage/storageAccounts/read", + "Microsoft.Storage/storageAccounts/write" + ], + "NotActions": [], + "DataActions": [], + "NotDataActions": [], + "AssignableScopes": [ + "/subscriptions/SUBSCRIPTION_ID" + ] + } + EOF + ``` + +2. Apply the Rancher AKSv2 Role: + + ``` + az role definition create --role-definition rancher-azure.json + ``` + +3. Verify if the Rancher AKSv2 Role was created: + + ``` + az role definition list | grep "Rancher AKSv2" + ``` + ## Syncing The AKS provisioner can synchronize the state of an AKS cluster between Rancher and the provider. For an in-depth technical explanation of how this works, see [Syncing.](../../../../reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md) For information on configuring the refresh interval, see [this section.](../../../../pages-for-subheaders/gke-cluster-configuration.md#configuring-the-refresh-interval) + ## Programmatically Creating AKS Clusters -The most common way to programmatically deploy AKS clusters through Rancher is by using the Rancher2 Terraform provider. The documentation for creating clusters with Terraform is [here.](https://registry.terraform.io/providers/rancher/rancher2/latest/docs/resources/cluster) \ No newline at end of file +The most common way to programmatically deploy AKS clusters through Rancher is by using the Rancher2 Terraform provider. The documentation for creating clusters with Terraform is [here](https://registry.terraform.io/providers/rancher/rancher2/latest/docs/resources/cluster). diff --git a/versioned_docs/version-2.7/pages-for-subheaders/k3s-hardening-guide.md b/versioned_docs/version-2.7/pages-for-subheaders/k3s-hardening-guide.md index e44593ec790..285577fbca5 100644 --- a/versioned_docs/version-2.7/pages-for-subheaders/k3s-hardening-guide.md +++ b/versioned_docs/version-2.7/pages-for-subheaders/k3s-hardening-guide.md @@ -702,7 +702,6 @@ spec: - config: kubelet-arg: - make-iptables-util-chains=true # CIS 4.2.7 - protect-kernel-defaults: true # CIS 4.2.6 ``` @@ -734,6 +733,7 @@ spec: - config: kubelet-arg: - make-iptables-util-chains=true # CIS 4.2.7 + protect-kernel-defaults: true # CIS 4.2.6 ``` diff --git a/versioned_docs/version-2.7/pages-for-subheaders/rancher-hardening-guides.md b/versioned_docs/version-2.7/pages-for-subheaders/rancher-hardening-guides.md index a7ffa3ce2e1..5db6c192945 100644 --- a/versioned_docs/version-2.7/pages-for-subheaders/rancher-hardening-guides.md +++ b/versioned_docs/version-2.7/pages-for-subheaders/rancher-hardening-guides.md @@ -27,25 +27,25 @@ Each self-assessment guide is accompanied by a hardening guide. These guides wer | Kubernetes Version | CIS Benchmark Version | Self Assessment Guide | Hardening Guides | |--------------------|-----------------------|-----------------------|------------------| | Kubernetes v1.23 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md) | [Link](rke1-hardening-guide.md) | -| Kubernetes v1.24 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md) | [Link](rke1-hardening-guide.md) | -| Kubernetes v1.25 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md) | [Link](rke1-hardening-guide.md) | +| Kubernetes v1.24 | CIS v1.24 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md) | [Link](rke1-hardening-guide.md) | +| Kubernetes v1.25/v1.26/v1.27 | CIS v1.7 | [Link](../reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md) | [Link](rke1-hardening-guide.md) | ### RKE2 Guides | Type | Kubernetes Version | CIS Benchmark Version | Self Assessment Guide | Hardening Guides | |------|--------------------|-----------------------|-----------------------|------------------| | Rancher provisioned RKE2 | Kubernetes v1.23 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md) | [Link](rke2-hardening-guide.md) | -| Rancher provisioned RKE2 | Kubernetes v1.24 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md) | [Link](rke2-hardening-guide.md) | -| Rancher provisioned RKE2 | Kubernetes v1.25 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md) | [Link](rke2-hardening-guide.md) | -| Standalone RKE2 | Kubernetes v1.25 | CIS v1.23 | [Link](https://docs.rke2.io/security/cis_self_assessment123) | [Link](https://docs.rke2.io/security/hardening_guide) | +| Rancher provisioned RKE2 | Kubernetes v1.24 | CIS v1.24 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md) | [Link](rke2-hardening-guide.md) | +| Rancher provisioned RKE2 | Kubernetes v1.25/v1.26/v1.27 | CIS v1.7 | [Link](../reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md) | [Link](rke2-hardening-guide.md) | +| Standalone RKE2 | Kubernetes v1.25/v1.26/v1.27 | CIS v1.7 | [Link](https://docs.rke2.io/security/cis_self_assessment123) | [Link](https://docs.rke2.io/security/hardening_guide) | ### K3s Guides | Type | Kubernetes Version | CIS Benchmark Version | Self Assessment Guide | Hardening Guides | |------|--------------------|-----------------------|-----------------------|------------------| | Rancher provisioned K3s cluster | Kubernetes v1.23 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md) | [Link](k3s-hardening-guide.md) | -| Rancher provisioned K3s cluster | Kubernetes v1.24 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md) | [Link](k3s-hardening-guide.md) | -| Rancher provisioned K3s cluster | Kubernetes v1.25 | CIS v1.23 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md) | [Link](k3s-hardening-guide.md) | +| Rancher provisioned K3s cluster | Kubernetes v1.24 | CIS v1.24 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md) | [Link](k3s-hardening-guide.md) | +| Rancher provisioned K3s cluster | Kubernetes v1.25/v1.26/v1.27 | CIS v1.7 | [Link](../reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md) | [Link](k3s-hardening-guide.md) | | Standalone K3s | Kubernetes v1.22 up to v1.24 | CIS v1.23 | [Link](https://docs.k3s.io/security/self-assessment) | [Link](https://docs.k3s.io/security/hardening-guide) | ## Rancher with SELinux diff --git a/versioned_docs/version-2.7/reference-guides/about-the-api/api-tokens.md b/versioned_docs/version-2.7/reference-guides/about-the-api/api-tokens.md index eccd4d962b1..5fe8a0eb5a4 100644 --- a/versioned_docs/version-2.7/reference-guides/about-the-api/api-tokens.md +++ b/versioned_docs/version-2.7/reference-guides/about-the-api/api-tokens.md @@ -3,7 +3,7 @@ title: API Tokens --- - + By default, some cluster-level API tokens are generated with infinite time-to-live (`ttl=0`). In other words, API tokens with `ttl=0` never expire unless you invalidate them. Tokens are not invalidated by changing a password. diff --git a/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/backup-configuration.md b/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/backup-configuration.md index 2a792778e0a..e7ef2b056bf 100644 --- a/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/backup-configuration.md +++ b/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/backup-configuration.md @@ -3,7 +3,7 @@ title: Backup Configuration --- - + The Backup Create page lets you configure a schedule, enable encryption and specify the storage location for your backups. diff --git a/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/examples.md b/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/examples.md index 4336a204d98..bab7533302e 100644 --- a/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/examples.md +++ b/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/examples.md @@ -3,7 +3,7 @@ title: Examples --- - + This section contains examples of Backup and Restore custom resources. diff --git a/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/restore-configuration.md b/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/restore-configuration.md index 5e958fcd674..b162a6ef873 100644 --- a/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/restore-configuration.md +++ b/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/restore-configuration.md @@ -3,7 +3,7 @@ title: Restore Configuration --- - + The Restore Create page lets you provide details of the backup to restore from diff --git a/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/storage-configuration.md b/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/storage-configuration.md index 3ad8b94487f..b1b8bad0896 100644 --- a/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/storage-configuration.md +++ b/versioned_docs/version-2.7/reference-guides/backup-restore-configuration/storage-configuration.md @@ -3,7 +3,7 @@ title: Backup Storage Location Configuration --- - + Configure a storage location where all backups are saved by default. You will have the option to override this with each backup, but will be limited to using an S3-compatible object store. diff --git a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md index 9fc13c9ce70..dc200ae62b1 100644 --- a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md +++ b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/logging-best-practices.md @@ -3,7 +3,7 @@ title: Logging Best Practices --- - + In this guide, we recommend best practices for cluster-level logging and application logging. diff --git a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md index 9255c76a28b..a6e34b03a50 100644 --- a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md +++ b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/monitoring-best-practices.md @@ -3,7 +3,7 @@ title: Monitoring Best Practices --- - + Configuring sensible monitoring and alerting rules is vital for running any production workloads securely and reliably. This is not different when using Kubernetes and Rancher. Fortunately the integrated monitoring and alerting functionality makes this whole process a lot easier. diff --git a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md index 3012223f423..9d24fb3c5db 100644 --- a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md +++ b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/rancher-managed-clusters-in-vsphere.md @@ -3,7 +3,7 @@ title: Best Practices for Rancher Managed vSphere Clusters --- - + This guide outlines a reference architecture for provisioning downstream Rancher clusters in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. diff --git a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md index 1298ff18b87..0cec0a91864 100644 --- a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md +++ b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-managed-clusters/tips-to-set-up-containers.md @@ -3,7 +3,7 @@ title: Tips for Setting Up Containers --- - + Running well-built containers can greatly impact the overall performance and security of your environment. diff --git a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md index c19ac243d98..74243559753 100644 --- a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md +++ b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/on-premises-rancher-in-vsphere.md @@ -3,7 +3,7 @@ title: Installing Rancher in a vSphere Environment --- - + This guide outlines a reference architecture for installing Rancher on an RKE Kubernetes cluster in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. diff --git a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md index cc8811dc77e..99583f75579 100644 --- a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md +++ b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/rancher-deployment-strategy.md @@ -3,7 +3,7 @@ title: Rancher Deployment Strategy --- - + There are two recommended deployment strategies for a Rancher instance that manages downstream Kubernetes clusters. Each one has its own pros and cons. Read more about which one would fit best for your use case. diff --git a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md index 1863ff82503..1ed05696fa2 100644 --- a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md +++ b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/tips-for-running-rancher.md @@ -3,7 +3,7 @@ title: Tips for Running Rancher --- - + This guide is geared toward use cases where Rancher is used to manage downstream Kubernetes clusters. The high-availability setup is intended to prevent losing access to downstream clusters if the Rancher server is not available. diff --git a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/tips-for-scaling-rancher.md b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/tips-for-scaling-rancher.md index 691ef18f576..e8e919bde9b 100644 --- a/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/tips-for-scaling-rancher.md +++ b/versioned_docs/version-2.7/reference-guides/best-practices/rancher-server/tips-for-scaling-rancher.md @@ -3,7 +3,7 @@ title: Tips for Scaling Rancher --- - + This guide aims to introduce the approaches that should be considered to scale Rancher setups, and associated challenges with doing so. As systems grow performance will naturally reduce, but there are steps we can take to minimize the load put on Rancher, as well as optimize Rancher's ability to handle these larger setups. diff --git a/versioned_docs/version-2.7/reference-guides/cli-with-rancher/kubectl-utility.md b/versioned_docs/version-2.7/reference-guides/cli-with-rancher/kubectl-utility.md index 45502753a08..fefa1a66b1b 100644 --- a/versioned_docs/version-2.7/reference-guides/cli-with-rancher/kubectl-utility.md +++ b/versioned_docs/version-2.7/reference-guides/cli-with-rancher/kubectl-utility.md @@ -3,7 +3,7 @@ title: kubectl Utility --- - + ## kubectl diff --git a/versioned_docs/version-2.7/reference-guides/cli-with-rancher/rancher-cli.md b/versioned_docs/version-2.7/reference-guides/cli-with-rancher/rancher-cli.md index 44024172658..0c9a27c1694 100644 --- a/versioned_docs/version-2.7/reference-guides/cli-with-rancher/rancher-cli.md +++ b/versioned_docs/version-2.7/reference-guides/cli-with-rancher/rancher-cli.md @@ -4,7 +4,7 @@ description: Interact with Rancher using command line interface (CLI) tools from --- - + The Rancher CLI (Command Line Interface) is a unified tool that you can use to interact with Rancher. With this tool, you can operate Rancher using a command line rather than the GUI. diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md index 6043df8f1ba..4640d142697 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/amazon-ec2.md @@ -3,7 +3,7 @@ title: EC2 Machine Configuration Reference --- - + For more details about EC2 nodes, refer to the official documentation for the [EC2 Management Console](https://aws.amazon.com/ec2). diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md index 98d299762b0..ba7e806295e 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/azure.md @@ -3,7 +3,7 @@ title: Azure Machine Configuration --- - + For more information about Azure, refer to the official [Azure documentation.](https://docs.microsoft.com/en-us/azure/?product=featured) diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md index 1d62fe9d9d7..634c7f48561 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/machine-configuration/digitalocean.md @@ -3,7 +3,7 @@ title: DigitalOcean Machine Configuration --- - + For more details about DigitalOcean, Droplets, refer to the [official documentation](https://docs.digitalocean.com/products/compute/). diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md index ffe36cf7723..bd79dabbed5 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md @@ -3,7 +3,7 @@ title: EC2 Node Template Configuration --- - + For more details about EC2, nodes, refer to the official documentation for the [EC2 Management Console](https://aws.amazon.com/ec2). diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md index e8fa8b382ee..e747dbbb547 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md @@ -3,7 +3,7 @@ title: Azure Node Template Configuration --- - + For more information about Azure, refer to the official [Azure documentation.](https://docs.microsoft.com/en-us/azure/?product=featured) diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md index 0e679ae7d13..87b5fccdcfb 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/digitalocean.md @@ -3,7 +3,7 @@ title: DigitalOcean Node Template Configuration --- - + Account access information is stored as a cloud credential. Cloud credentials are stored as Kubernetes secrets. Multiple node templates can use the same cloud credential. You can use an existing cloud credential or create a new one. diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md index cbecb1be01b..4e44d5ceca7 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md @@ -3,7 +3,7 @@ title: Nutanix Node Template Configuration --- - + ## Account Access diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md index 4ff462b1d1c..ace79a39ca7 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md @@ -3,7 +3,7 @@ title: VSphere Node Template Configuration --- - + ## Account Access diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md index 136c71a45a2..67cd280e470 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/aks-cluster-configuration.md @@ -3,7 +3,7 @@ title: AKS Cluster Configuration Reference --- - + ## Changes in Rancher v2.6 diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md index e830d5b4ffa..4a9bbe4f0ef 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/eks-cluster-configuration.md @@ -3,7 +3,7 @@ title: EKS Cluster Configuration Reference --- - + ### Account Access diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md index 60228c3fb97..120be47a641 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/gke-cluster-configuration/gke-private-clusters.md @@ -3,7 +3,7 @@ title: Private Clusters --- - + In GKE, [private clusters](https://cloud.google.com/kubernetes-engine/docs/concepts/private-cluster-concept) are clusters whose nodes are isolated from inbound and outbound traffic by assigning them internal IP addresses only. Private clusters in GKE have the option of exposing the control plane endpoint as a publicly accessible address or as a private address. This is different from other Kubernetes providers, which may refer to clusters with private control plane endpoints as "private clusters" but still allow traffic to and from nodes. You may want to create a cluster with private nodes, with or without a public control plane endpoint, depending on your organization's networking and security requirements. A GKE cluster provisioned from Rancher can use isolated nodes by selecting "Private Cluster" in the Cluster Options (under "Show advanced options"). The control plane endpoint can optionally be made private by selecting "Enable Private Endpoint". diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md index 0d03db56bb1..b0047715921 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/rke1-cluster-configuration.md @@ -127,7 +127,7 @@ ACE is available on RKE, RKE2, and K3s clusters that are provisioned or register ::: -ACE must be set up [manually](../../../how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/register-existing-clusters#authorized-cluster-endpoint-support-for-rke2-and-k3s-clusters.md) on RKE2 and K3s clusters. In RKE, ACE is enabled by default in Rancher-launched Kubernetes clusters, using the IP of the node with the `controlplane` role and the default Kubernetes self-signed certificates. +ACE must be set up [manually](../../../how-to-guides/new-user-guides/kubernetes-clusters-in-rancher-setup/register-existing-clusters.md#authorized-cluster-endpoint-support-for-rke2-and-k3s-clusters) on RKE2 and K3s clusters. In RKE, ACE is enabled by default in Rancher-launched Kubernetes clusters, using the IP of the node with the `controlplane` role and the default Kubernetes self-signed certificates. For more detail on how an authorized cluster endpoint works and why it is used, refer to the [architecture section.](../../../reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md#4-authorized-cluster-endpoint) diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md index 9ccc2cfe9f0..63fa8df3511 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/sync-clusters.md @@ -3,7 +3,7 @@ title: Syncing --- - + Syncing allows Rancher to update cluster values so that they're up to date with the corresponding cluster object hosted in AKS, EKS or GKE. This enables sources other than Rancher to own a hosted cluster’s state. diff --git a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md index a0e092fee87..3c363d053cf 100644 --- a/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md +++ b/versioned_docs/version-2.7/reference-guides/cluster-configuration/rancher-server-configuration/use-existing-nodes/rancher-agent-options.md @@ -3,7 +3,7 @@ title: Rancher Agent Options --- - + Rancher deploys an agent on each node to communicate with the node. This pages describes the options that can be passed to the agent. To use these options, you will need to [create a cluster with custom nodes](../../../../pages-for-subheaders/use-existing-nodes.md) and add the options to the generated `docker run` command when adding a node. diff --git a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/examples.md b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/examples.md index 7c586657eb2..c65722cfa97 100644 --- a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/examples.md +++ b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/examples.md @@ -3,7 +3,7 @@ title: Examples --- - + ### ServiceMonitor diff --git a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/helm-chart-options.md b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/helm-chart-options.md index fabd9fc222f..112c41c9ea0 100644 --- a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/helm-chart-options.md +++ b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/helm-chart-options.md @@ -3,7 +3,7 @@ title: Helm Chart Options --- - + ## Configuring Resource Limits and Requests diff --git a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/receivers.md b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/receivers.md index eb3a029b45b..dc459f34378 100644 --- a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/receivers.md +++ b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/receivers.md @@ -3,7 +3,7 @@ title: Receiver Configuration --- - + The [Alertmanager Config](https://prometheus.io/docs/alerting/latest/configuration/#configuration-file) Secret contains the configuration of an Alertmanager instance that sends out notifications based on alerts it receives from Prometheus. diff --git a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/routes.md b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/routes.md index 31424a3815b..3f538d92112 100644 --- a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/routes.md +++ b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/routes.md @@ -3,7 +3,7 @@ title: Route Configuration --- - + The route configuration is the section of the Alertmanager custom resource that controls how the alerts fired by Prometheus are grouped and filtered before they reach the receiver. diff --git a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md index 780d13c2673..30fccb634c8 100644 --- a/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md +++ b/versioned_docs/version-2.7/reference-guides/monitoring-v2-configuration/servicemonitors-and-podmonitors.md @@ -3,7 +3,7 @@ title: ServiceMonitor and PodMonitor Configuration --- - + ServiceMonitors and PodMonitors are both pseudo-CRDs that map the scrape configuration of the Prometheus custom resource. diff --git a/versioned_docs/version-2.7/reference-guides/prometheus-federator/rbac.md b/versioned_docs/version-2.7/reference-guides/prometheus-federator/rbac.md index 47887415d85..8b54ce9559f 100644 --- a/versioned_docs/version-2.7/reference-guides/prometheus-federator/rbac.md +++ b/versioned_docs/version-2.7/reference-guides/prometheus-federator/rbac.md @@ -2,6 +2,10 @@ title: Role-Based Access Control --- + + + + This section describes the expectations for Role-Based Access Control (RBAC) for Prometheus Federator. As described in the section on [namespaces](../../pages-for-subheaders/prometheus-federator.md#namespaces), Prometheus Federator expects that Project Owners, Project Members, and other users in the cluster with Project-level permissions (e.g. permissions in a certain set of namespaces identified by a single label selector) have minimal permissions in any namespaces except the Project Registration Namespace (which is imported into the project by default) and those that already comprise their projects. Therefore, in order to allow Project Owners to assign specific chart permissions to other users in their Project namespaces, the Helm Project Operator will automatically watch the following bindings: diff --git a/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/architecture-recommendations.md b/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/architecture-recommendations.md index d68f5b9320c..1ece990ff8c 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/architecture-recommendations.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/architecture-recommendations.md @@ -2,6 +2,10 @@ title: Architecture Recommendations --- + + + + If you are installing Rancher on a single node, the main architecture recommendation that applies to your installation is that the node running Rancher should be [separate from downstream clusters.](#separation-of-rancher-and-user-clusters) ## Separation of Rancher and User Clusters diff --git a/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md b/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md index ddee7a7da62..8abfd0c9f6c 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/communicating-with-downstream-user-clusters.md @@ -2,6 +2,10 @@ title: Communicating with Downstream User Clusters --- + + + + This section describes how Rancher provisions and manages the downstream user clusters that run your apps and services. The below diagram shows how the cluster controllers, cluster agents, and node agents allow Rancher to control downstream clusters. diff --git a/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/rancher-server-and-components.md b/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/rancher-server-and-components.md index bb1cf170e7a..e9fec332622 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/rancher-server-and-components.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-manager-architecture/rancher-server-and-components.md @@ -2,6 +2,10 @@ title: Rancher Server and Components --- + + + + The majority of Rancher 2.x software runs on the Rancher Server. Rancher Server includes all the software components used to manage the entire Rancher deployment. The figure below illustrates the high-level architecture of Rancher 2.x. The figure depicts a Rancher Server installation that manages two downstream Kubernetes clusters: one created by RKE and another created by Amazon EKS (Elastic Kubernetes Service). diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md index ddf9809440a..d0ddba7d1e7 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md @@ -2,6 +2,10 @@ title: K3s Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.23 --- + + + + This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md deleted file mode 100644 index 8944de04c27..00000000000 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md +++ /dev/null @@ -1,3148 +0,0 @@ ---- -title: K3s Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.24 ---- - -This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.23 | Kubernetes v1.24 | - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.23. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -Each control in the CIS Kubernetes Benchmark was evaluated against a K3s cluster that was configured according to the accompanying hardening guide. - -Where control audits differ from the original CIS benchmark, the audit commands specific to K3s are provided for testing. - -These are the possible results for each control: - -- **Pass** - The K3s cluster passes the audit outlined in the benchmark. -- **Not Applicable** - The control is not applicable to K3s because of how it is designed to operate. The remediation section explains why. -- **Warn** - The control is manual in the CIS benchmark and it depends on the cluster's use-case or some other factor that must be determined by the cluster operator. These controls have been evaluated to ensure K3s doesn't prevent their implementation, but no further configuration or auditing of the cluster has been performed. - -This guide makes the assumption that K3s is running as a Systemd unit. Your installation may vary. Adjust the "audit" commands to fit your scenario. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Control Plane Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the -control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-apiserver.yaml - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-controller-manager.yaml - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-scheduler.yaml - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 /etc/kubernetes/manifests/etcd.yaml - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /etc/kubernetes/manifests/etcd.yaml - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 1.1.11 -``` - -**Expected Result**: - -```console -'700' is equal to '700' -``` - -**Returned Value**: - -```console -700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** Not Applicable - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/admin.conf - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 scheduler - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root scheduler - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 controllermanager - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root controllermanager - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/server/tls -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown -R root:root /etc/kubernetes/pki/ - -**Audit:** - -```bash -find /var/lib/rancher/k3s/server/tls | xargs stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Manual) - - -**Result:** warn - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 644 /etc/kubernetes/pki/*.crt - -**Audit:** - -```bash -stat -c %n %a /var/lib/rancher/k3s/server/tls/*.crt -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) - - -**Result:** warn - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /etc/kubernetes/pki/*.key - -**Audit:** - -```bash -stat -c %n %a /var/lib/rancher/k3s/server/tls/*.key -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth' -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep containerd | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' is present OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 521 1 0 22:09 ? 00:00:00 /usr/bin/containerd root 802 1 0 22:09 ? 00:00:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 3970 1 0 22:13 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 836d5508918bf22689e12f2885aeb9de5c2420beb956f6dc587d11b049e4edf4 -address /run/k3s/containerd/containerd.sock root 4088 1 0 22:13 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 6148f976b57db791da86119c599700f683df838df56b1382d428ec38402caa64 -address /run/k3s/containerd/containerd.sock root 4109 1 0 22:13 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id b0e22b39e80606c4ad5d7fdafe21a771a27a5dce8f06155af579a9fad8158219 -address /run/k3s/containerd/containerd.sock root 5321 1 0 22:14 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id f60b96ef6beaf1b7903aba944af101a7d401082969ad8b5aea633bda1043b165 -address /run/k3s/containerd/containerd.sock root 5395 1 0 22:14 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id df001d7d85239f1cfdd8e041db801a6383bc18e5e10d0cd8e8e4e6ca9b7ce036 -address /run/k3s/containerd/containerd.sock root 6366 1 0 22:15 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id a900df9f736ca35b5dbd603034588a461d706ae6c83529136a81ec13e0ecedc0 -address /run/k3s/containerd/containerd.sock root 7859 1 0 22:15 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id b3c1510cafad33b31758db1b7c771efe98f0d395d5d52caf90db7bd379966299 -address /run/k3s/containerd/containerd.sock root 7896 1 0 22:15 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id e5720fc8f9e95f2fd8b8e87c93f25213315d78b630fc889b2a5cb8b18f2a1442 -address /run/k3s/containerd/containerd.sock root 9773 9761 4 22:22 ? 00:00:16 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 10275 1 0 22:22 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 8b29d2205c5f7d47d0ecd4f95b7b96062454233e66450f9163058647e7b5c390 -address /run/k3s/containerd/containerd.sock root 11185 1 0 22:23 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9581871a145dd1c0bbff06cddea0030a30de2760e90c5fa9154cccb250f05faa -address /run/k3s/containerd/containerd.sock root 13605 1 0 22:27 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id e05825dc2a33d576c35cc1b56610d3e4459d209524645f95f163c100f6e5df46 -address /run/k3s/containerd/containerd.sock root 13770 1 0 22:27 ? 00:00:00 /var/lib/rancher/k3s/data/4cdfcad9f220e885cbc32cf86c6cb0d26b496e3949efb0aa33fb37692e11d521/bin/containerd-shim-runc-v2 -namespace k8s.io -id 74d10151f05f78b0d38deb2b1ee045bf7b72e7b879e6a15112c8495f98d230b8 -address /run/k3s/containerd/containerd.sock -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'AlwaysPullImages' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'ServiceAccount' -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port' -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling' -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-path' -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxage' -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxbackup' -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxsize' -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.23 Ensure that the --request-timeout argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameter as appropriate and if needed. -For example, --request-timeout=300s - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'request-timeout' -``` - -**Expected Result**: - -```console -'--request-timeout' is not present OR '--request-timeout' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-lookup' -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.25 Ensure that the --service-account-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-key-file' -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 1.2.29 -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep -A1 'Running kube-apiserver' | tail -n2 -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile' -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'encryption-provider-config' -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.31 Ensure that encryption providers are appropriately configured (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit:** - -```bash -grep aescbc /path/to/encryption-config.json -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites' -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) - - -**Result:** warn - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold' -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling' -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials' -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file' -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file' -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'bind-address' -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address' -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.1 -``` - -**Expected Result**: - -```console -'cert-file' is present AND 'key-file' is present -``` - -**Returned Value**: - -```console -cert-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.key -``` - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and set the below parameter. ---client-cert-auth="true" - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.2 -``` - -**Expected Result**: - -```console -'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -client-cert-auth: true -``` - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.3 -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.4 -``` - -**Expected Result**: - -```console -'cert-file' is present AND 'key-file' is present -``` - -**Returned Value**: - -```console -cert-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.key -``` - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and set the below parameter. ---peer-client-cert-auth=true - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.5 -``` - -**Expected Result**: - -```console -'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -client-cert-auth: true -``` - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.6 -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Manual) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.7 -``` - -**Expected Result**: - -```console -'trusted-ca-file' is present -``` - -**Returned Value**: - -```console -trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Manual) - - -**Result:** warn - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-policy-file' -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chmod 644 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig -``` - -**Expected Result**: - -```console -'permissions' is present OR '/var/lib/rancher/k3s/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is present OR '/var/lib/rancher/k3s/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/agent/kubelet.kubeconfig -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/agent/kubelet.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/server/tls/server-ca.crt -``` - -**Expected Result**: - -```console -'644' is equal to '644' OR '640' is present OR '600' is present OR '444' is present OR '440' is present OR '400' is present OR '000' is present -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/server/tls/client-ca.crt -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /var/lib/kubelet/config.yaml - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /var/lib/kubelet/config.yaml - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "anonymous-auth" | grep -v grep; else echo "--anonymous-auth=false"; fi' -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "authorization-mode" | grep -v grep; else echo "--authorization-mode=Webhook"; fi' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "client-ca-file" | grep -v grep; else echo "--client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt"; fi' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:02 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:02Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'read-only-port' -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:03 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:03Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-2 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=995abdc2-f967-4bd6-936e-f3c26594573c --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'streaming-connection-idle-timeout' -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'protect-kernel-defaults' -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -Feb 27 22:22:03 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:03Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-2 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=995abdc2-f967-4bd6-936e-f3c26594573c --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'make-iptables-util-chains' -``` - -**Expected Result**: - -```console -'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present -``` - -**Returned Value**: - -```console -Feb 27 22:22:03 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:03Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-2 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=995abdc2-f967-4bd6-936e-f3c26594573c --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 22:22:03 ip-172-31-25-2 k3s[9761]: time="2023-02-27T22:22:03Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-25-2 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=995abdc2-f967-4bd6-936e-f3c26594573c --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Manual) - - -**Result:** warn - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** warn - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) - - -**Result:** warn - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md new file mode 100644 index 00000000000..1d348069a2a --- /dev/null +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md @@ -0,0 +1,3208 @@ +--- +title: K3s Self-Assessment Guide - CIS Benchmark v1.24 - K8s v1.24 +--- + + + + + +This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.24 | Kubernetes v1.24 | + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.24. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +Each control in the CIS Kubernetes Benchmark was evaluated against a K3s cluster that was configured according to the accompanying hardening guide. + +Where control audits differ from the original CIS benchmark, the audit commands specific to K3s are provided for testing. + +These are the possible results for each control: + +- **Pass** - The K3s cluster passes the audit outlined in the benchmark. +- **Not Applicable** - The control is not applicable to K3s because of how it is designed to operate. The remediation section explains why. +- **Warn** - The control is manual in the CIS benchmark and it depends on the cluster's use-case or some other factor that must be determined by the cluster operator. These controls have been evaluated to ensure K3s doesn't prevent their implementation, but no further configuration or auditing of the cluster has been performed. + +This guide makes the assumption that K3s is running as a Systemd unit. Your installation may vary. Adjust the "audit" commands to fit your scenario. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 644 /etc/kubernetes/manifests/kube-apiserver.yaml + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-controller-manager.yaml + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-scheduler.yaml + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /etc/kubernetes/manifests/etcd.yaml + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /etc/kubernetes/manifests/etcd.yaml + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 1.1.11 +``` + +**Expected Result**: + +```console +'700' is equal to '700' +``` + +**Returned Value**: + +```console +700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** Not Applicable + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 scheduler + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root scheduler + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 controllermanager + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root controllermanager + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/tls +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /etc/kubernetes/pki/ + +**Audit:** + +```bash +find /var/lib/rancher/k3s/server/tls | xargs stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/pki/*.crt + +**Audit:** + +```bash +stat -c %n %a /var/lib/rancher/k3s/server/tls/*.crt +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/pki/*.key + +**Audit:** + +```bash +stat -c %n %a /var/lib/rancher/k3s/server/tls/*.key +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth' +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' is present OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 410 1 0 Sep11 ? 00:01:50 /usr/bin/containerd root 539 1 0 Sep11 ? 00:00:09 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 45213 45195 3 Sep11 ? 00:45:14 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 47188 1 0 Sep11 ? 00:01:00 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 02b8fdd94b7628d575ace92f337dcc93202151d07f33858341cfcb0178fea586 -address /run/k3s/containerd/containerd.sock root 47235 1 0 Sep11 ? 00:00:33 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id eb0f03c4bc1125ae34e5de77c7eaeb9c2c1e46bec0bb106b99281df7353f9ded -address /run/k3s/containerd/containerd.sock root 47948 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5eece7110bd3876414f890ed1b7158eb91f60d1f14450a9f8c77a0fc62b73c4a -address /run/k3s/containerd/containerd.sock root 48047 1 0 Sep11 ? 00:00:32 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4ef831f4bb8830a0a7b46a1e8be58197be00846ea0caa094014ea7ce3adf008e -address /run/k3s/containerd/containerd.sock root 48220 1 0 Sep11 ? 00:00:33 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id f8d5d3791ad2b1a8534476aa2fbdf8da1e4f0b9fdcdd26b1ae161142458a5336 -address /run/k3s/containerd/containerd.sock root 48878 1 0 Sep11 ? 00:00:32 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 41b93a6581e272b0852257b3d7c44ab4cadcdf465a3579a8b29b493ea75feaf7 -address /run/k3s/containerd/containerd.sock root 49870 1 0 Sep11 ? 00:00:30 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id be329cdccda4049f048c759a2b1915cd72526473ff7768e895bcfc153a66c125 -address /run/k3s/containerd/containerd.sock root 50271 1 0 Sep11 ? 00:00:32 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id cceb5d26eba7d7d3c474a2dc842b72495689f4e40055505ea2598e4ac6849d40 -address /run/k3s/containerd/containerd.sock root 50571 1 0 Sep11 ? 00:00:32 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3a26e691e0d0186165d523bef22b0af71f175c39df82845b32ce7b4e3d652d4a -address /run/k3s/containerd/containerd.sock root 96693 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9ed77e6e58410f1295f730ba4a8f8daf7aff8f4e896e24219a8fa710729c2287 -address /run/k3s/containerd/containerd.sock root 97726 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 1be4fe50e6bb29d4549f8b03102b5dc15b7669fe56b32beae3f701cf6d2e58cc -address /run/k3s/containerd/containerd.sock root 97923 1 1 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/484bf694b486d93cc93bcf90f74d5c77628550d4456f21760fd720b88c93881e/bin/containerd-shim-runc-v2 -namespace k8s.io -id 7c65c47376f36a8980a5bebad7ffdc1abe1853821cf6c4a1d45f1b6be3452062 -address /run/k3s/containerd/containerd.sock +``` + +### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --kubelet-https parameter. + +### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' +``` + +**Expected Result**: + +```console +'--kubelet-certificate-authority' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'ServiceAccount' +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port' +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.18 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling' +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-path' +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxage' +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxbackup' +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxsize' +``` + +**Expected Result**: + +```console +'--audit-log-maxsize' is greater or equal to 100 +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.23 Ensure that the --request-timeout argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameter as appropriate and if needed. +For example, --request-timeout=300s + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'request-timeout' +``` + +**Expected Result**: + +```console +'--request-timeout' is not present OR '--request-timeout' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-lookup' +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.25 Ensure that the --service-account-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-key-file' +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 1.2.29 +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep -A1 'Running kube-apiserver' | tail -n2 +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile' +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'encryption-provider-config' +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.31 Ensure that encryption providers are appropriately configured (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit:** + +```bash +grep aescbc /path/to/encryption-config.json +``` + +### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold' +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling' +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials' +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file' +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file' +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'bind-address' +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address' +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.1 +``` + +**Expected Result**: + +```console +'cert-file' is present AND 'key-file' is present +``` + +**Returned Value**: + +```console +cert-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.key +``` + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and set the below parameter. +--client-cert-auth="true" + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.2 +``` + +**Expected Result**: + +```console +'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +client-cert-auth: true +``` + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.3 +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.4 +``` + +**Expected Result**: + +```console +'cert-file' is present AND 'key-file' is present +``` + +**Returned Value**: + +```console +cert-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.key +``` + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and set the below parameter. +--peer-client-cert-auth=true + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.5 +``` + +**Expected Result**: + +```console +'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +client-cert-auth: true +``` + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.6 +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Manual) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.7 +``` + +**Expected Result**: + +```console +'trusted-ca-file' is present +``` + +**Returned Value**: + +```console +trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Manual) + + +**Result:** warn + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-policy-file' +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +**Returned Value**: + +```console +600 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'600' is equal to '600' +``` + +**Returned Value**: + +```console +600 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/server/tls/server-ca.crt +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +**Returned Value**: + +```console +644 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/tls/client-ca.crt +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/kubelet/config.yaml + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/kubelet/config.yaml + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "anonymous-auth" | grep -v grep; else echo "--anonymous-auth=false"; fi' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "authorization-mode" | grep -v grep; else echo "--authorization-mode=Webhook"; fi' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "client-ca-file" | grep -v grep; else echo "--client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt"; fi' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:31:58 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:31:58Z" level=info msg="Running kube-apiserver --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'read-only-port' +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:32:02 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:32:02Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-3-32 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=cc5faddd-9c87-4a04-97c2-dcf4cbcbe10f --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'streaming-connection-idle-timeout' +``` + +### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--protect-kernel-defaults=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'protect-kernel-defaults' +``` + +**Expected Result**: + +```console +'--protect-kernel-defaults' is equal to 'true' +``` + +**Returned Value**: + +```console +Sep 11 20:32:02 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:32:02Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-3-32 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=cc5faddd-9c87-4a04-97c2-dcf4cbcbe10f --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'make-iptables-util-chains' +``` + +**Expected Result**: + +```console +'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:32:02 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:32:02Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-3-32 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=cc5faddd-9c87-4a04-97c2-dcf4cbcbe10f --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +### 4.2.9 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/kubelet/config.yaml +``` + +**Expected Result**: + +```console +'--event-qps' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 410 1 0 Sep11 ? 00:01:50 /usr/bin/containerd root 45213 45195 3 Sep11 ? 00:45:15 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:32:02 ip-172-31-3-32 k3s[45195]: time="2023-09-11T20:32:02Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-3-32 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=cc5faddd-9c87-4a04-97c2-dcf4cbcbe10f --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--rotate-certificates' is present OR '--rotate-certificates' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 410 1 0 Sep11 ? 00:01:50 /usr/bin/containerd root 45213 45195 3 Sep11 ? 00:45:15 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/kubelet/config.yaml +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 410 1 0 Sep11 ? 00:01:50 /usr/bin/containerd root 45213 45195 3 Sep11 ? 00:45:15 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Manual) + + +**Result:** warn + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +### 5.2.7 Minimize the admission of root containers (Automated) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Automated) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md new file mode 100644 index 00000000000..e7373288b35 --- /dev/null +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md @@ -0,0 +1,3215 @@ +--- +title: K3s Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25/v1.26/v1.27 +--- + + + + + +This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25/v1.26/v1.27 | + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +Each control in the CIS Kubernetes Benchmark was evaluated against a K3s cluster that was configured according to the accompanying hardening guide. + +Where control audits differ from the original CIS benchmark, the audit commands specific to K3s are provided for testing. + +These are the possible results for each control: + +- **Pass** - The K3s cluster passes the audit outlined in the benchmark. +- **Not Applicable** - The control is not applicable to K3s because of how it is designed to operate. The remediation section explains why. +- **Warn** - The control is manual in the CIS benchmark and it depends on the cluster's use-case or some other factor that must be determined by the cluster operator. These controls have been evaluated to ensure K3s doesn't prevent their implementation, but no further configuration or auditing of the cluster has been performed. + +This guide makes the assumption that K3s is running as a Systemd unit. Your installation may vary. Adjust the "audit" commands to fit your scenario. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-apiserver.yaml +Not Applicable. + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml +Not Applicable. + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-controller-manager.yaml +Not Applicable. + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml +Not Applicable. + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-scheduler.yaml +Not Applicable. + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml +Not Applicable. + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /etc/kubernetes/manifests/etcd.yaml +Not Applicable. + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /etc/kubernetes/manifests/etcd.yaml +Not Applicable. + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 +Not Applicable. + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root +Not Applicable. + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 1.1.11 +``` + +**Expected Result**: + +```console +'700' is equal to '700' +``` + +**Returned Value**: + +```console +700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** Not Applicable + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd +Not Applicable. + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 scheduler + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root scheduler + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 controllermanager + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root controllermanager + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/cred/controller.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /var/lib/rancher/k3s/server/tls + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/tls +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/pki/*.crt + +**Audit:** + +```bash +stat -c %n %a /var/lib/rancher/k3s/server/tls/*.crt +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/pki/*.key + +**Audit:** + +```bash +stat -c %n %a /var/lib/rancher/k3s/server/tls/*.key +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 663 1 0 Sep11 ? 00:00:08 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 3021 1 0 Sep11 ? 00:00:29 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4790d392966915d995e666002c56ed4cce6dd86f305ce2ee390547a1fcbf6c82 -address /run/k3s/containerd/containerd.sock root 3035 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9d73e6a160ccde6c7c7d4ba0df3b9f696e3de2ebfc0f19a1dcbdf13aea496427 -address /run/k3s/containerd/containerd.sock root 3235 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 587f6221ee9f36c877231ada8d816a799dfda186332c33378d1eb16c72cdc87d -address /run/k3s/containerd/containerd.sock root 4435 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a74c9ec7d99785c2f2d4e6826aa80c22eb8b38249e8f99679ece00a818e9b7b3 -address /run/k3s/containerd/containerd.sock root 4985 1 0 Sep11 ? 00:00:53 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b0c9784dbe0fcbe8be10c857976e70ec84a208cb814e87b5ca085a02d434f8c -address /run/k3s/containerd/containerd.sock root 5056 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id f3231ff35f18056e74eda14907f296be15f7ea1c6ae5ab7904e27d4d18183301 -address /run/k3s/containerd/containerd.sock root 5868 1 0 Sep11 ? 00:00:27 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3e908c4d0b10df275bdef6f72fbcfa09517d11cf749236ad020364e14d77bc93 -address /run/k3s/containerd/containerd.sock root 6158 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id bec5780a5c73fa3154aa3b5ee26cdf23202db821205893e7e66ae17e6103e97b -address /run/k3s/containerd/containerd.sock root 7366 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a81b78845bdcaef710314c93e5ea0d0617f37a8929472f7b570ab90c6667f57f -address /run/k3s/containerd/containerd.sock root 97274 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id c90652c935d9e79af45b9a9ac2b4fe315e2a761a0525737fdb95c680123a164c -address /run/k3s/containerd/containerd.sock root 98309 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 431a2763636488efd7d104c228d41f4f2ecd8c06a7fc375d8977ab0d238936a8 -address /run/k3s/containerd/containerd.sock root 98493 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b480d2fa55c8cc0105ec1902887040c017f03d5b1eb6c73c24bb9d523ad9b37 -address /run/k3s/containerd/containerd.sock +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' is present OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 663 1 0 Sep11 ? 00:00:08 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 3021 1 0 Sep11 ? 00:00:29 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4790d392966915d995e666002c56ed4cce6dd86f305ce2ee390547a1fcbf6c82 -address /run/k3s/containerd/containerd.sock root 3035 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9d73e6a160ccde6c7c7d4ba0df3b9f696e3de2ebfc0f19a1dcbdf13aea496427 -address /run/k3s/containerd/containerd.sock root 3235 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 587f6221ee9f36c877231ada8d816a799dfda186332c33378d1eb16c72cdc87d -address /run/k3s/containerd/containerd.sock root 4435 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a74c9ec7d99785c2f2d4e6826aa80c22eb8b38249e8f99679ece00a818e9b7b3 -address /run/k3s/containerd/containerd.sock root 4985 1 0 Sep11 ? 00:00:53 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b0c9784dbe0fcbe8be10c857976e70ec84a208cb814e87b5ca085a02d434f8c -address /run/k3s/containerd/containerd.sock root 5056 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id f3231ff35f18056e74eda14907f296be15f7ea1c6ae5ab7904e27d4d18183301 -address /run/k3s/containerd/containerd.sock root 5868 1 0 Sep11 ? 00:00:27 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3e908c4d0b10df275bdef6f72fbcfa09517d11cf749236ad020364e14d77bc93 -address /run/k3s/containerd/containerd.sock root 6158 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id bec5780a5c73fa3154aa3b5ee26cdf23202db821205893e7e66ae17e6103e97b -address /run/k3s/containerd/containerd.sock root 7366 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a81b78845bdcaef710314c93e5ea0d0617f37a8929472f7b570ab90c6667f57f -address /run/k3s/containerd/containerd.sock root 97274 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id c90652c935d9e79af45b9a9ac2b4fe315e2a761a0525737fdb95c680123a164c -address /run/k3s/containerd/containerd.sock root 98309 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 431a2763636488efd7d104c228d41f4f2ecd8c06a7fc375d8977ab0d238936a8 -address /run/k3s/containerd/containerd.sock root 98493 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b480d2fa55c8cc0105ec1902887040c017f03d5b1eb6c73c24bb9d523ad9b37 -address /run/k3s/containerd/containerd.sock +``` + +### 1.2.4 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.5 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= +Permissive - When generating serving certificates, functionality could break in conjunction with hostname overrides which are required for certain cloud providers. + +### 1.2.6 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.7 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.9 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.10 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' is present +``` + +**Returned Value**: + +```console +root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 663 1 0 Sep11 ? 00:00:08 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 3021 1 0 Sep11 ? 00:00:29 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4790d392966915d995e666002c56ed4cce6dd86f305ce2ee390547a1fcbf6c82 -address /run/k3s/containerd/containerd.sock root 3035 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9d73e6a160ccde6c7c7d4ba0df3b9f696e3de2ebfc0f19a1dcbdf13aea496427 -address /run/k3s/containerd/containerd.sock root 3235 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 587f6221ee9f36c877231ada8d816a799dfda186332c33378d1eb16c72cdc87d -address /run/k3s/containerd/containerd.sock root 4435 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a74c9ec7d99785c2f2d4e6826aa80c22eb8b38249e8f99679ece00a818e9b7b3 -address /run/k3s/containerd/containerd.sock root 4985 1 0 Sep11 ? 00:00:53 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b0c9784dbe0fcbe8be10c857976e70ec84a208cb814e87b5ca085a02d434f8c -address /run/k3s/containerd/containerd.sock root 5056 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id f3231ff35f18056e74eda14907f296be15f7ea1c6ae5ab7904e27d4d18183301 -address /run/k3s/containerd/containerd.sock root 5868 1 0 Sep11 ? 00:00:27 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3e908c4d0b10df275bdef6f72fbcfa09517d11cf749236ad020364e14d77bc93 -address /run/k3s/containerd/containerd.sock root 6158 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id bec5780a5c73fa3154aa3b5ee26cdf23202db821205893e7e66ae17e6103e97b -address /run/k3s/containerd/containerd.sock root 7366 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a81b78845bdcaef710314c93e5ea0d0617f37a8929472f7b570ab90c6667f57f -address /run/k3s/containerd/containerd.sock root 97274 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id c90652c935d9e79af45b9a9ac2b4fe315e2a761a0525737fdb95c680123a164c -address /run/k3s/containerd/containerd.sock root 98309 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 431a2763636488efd7d104c228d41f4f2ecd8c06a7fc375d8977ab0d238936a8 -address /run/k3s/containerd/containerd.sock root 98493 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b480d2fa55c8cc0105ec1902887040c017f03d5b1eb6c73c24bb9d523ad9b37 -address /run/k3s/containerd/containerd.sock +``` + +### 1.2.12 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... +Permissive - Enabling Pod Security Policy can cause applications to unexpectedly fail. + +### 1.2.13 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.14 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.15 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.16 Ensure that the --secure-port argument is not set to 0 - NoteThis recommendation is obsolete and will be deleted per the consensus process (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port' +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.17 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling' +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.18 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log +Permissive. + +### 1.2.19 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 +Permissive. + +### 1.2.20 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 +Permissive. + +### 1.2.21 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 +Permissive. + +### 1.2.22 Ensure that the --request-timeout argument is set as appropriate (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameter as appropriate and if needed. +For example, --request-timeout=300s +Permissive. + +### 1.2.23 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.24 Ensure that the --service-account-key-file argument is set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +### 1.2.25 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 1.2.29 +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.26 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep -A1 'Running kube-apiserver' | tail -n2 +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +### 1.2.27 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.28 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile' +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 1.2.29 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= +Permissive - Enabling encryption changes how data can be recovered as data is encrypted. + +### 1.2.30 Ensure that encryption providers are appropriately configured (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. +Permissive - Enabling encryption changes how data can be recovered as data is encrypted. + +### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold' +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling' +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials' +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file' +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file' +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --terminated-pod-gc-threshold=10 --use-service-account-credentials=true" +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true +Not Applicable. + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep containerd | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 663 1 0 Sep11 ? 00:00:08 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 3021 1 0 Sep11 ? 00:00:29 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4790d392966915d995e666002c56ed4cce6dd86f305ce2ee390547a1fcbf6c82 -address /run/k3s/containerd/containerd.sock root 3035 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9d73e6a160ccde6c7c7d4ba0df3b9f696e3de2ebfc0f19a1dcbdf13aea496427 -address /run/k3s/containerd/containerd.sock root 3235 1 0 Sep11 ? 00:00:31 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 587f6221ee9f36c877231ada8d816a799dfda186332c33378d1eb16c72cdc87d -address /run/k3s/containerd/containerd.sock root 4435 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a74c9ec7d99785c2f2d4e6826aa80c22eb8b38249e8f99679ece00a818e9b7b3 -address /run/k3s/containerd/containerd.sock root 4985 1 0 Sep11 ? 00:00:53 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b0c9784dbe0fcbe8be10c857976e70ec84a208cb814e87b5ca085a02d434f8c -address /run/k3s/containerd/containerd.sock root 5056 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id f3231ff35f18056e74eda14907f296be15f7ea1c6ae5ab7904e27d4d18183301 -address /run/k3s/containerd/containerd.sock root 5868 1 0 Sep11 ? 00:00:27 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3e908c4d0b10df275bdef6f72fbcfa09517d11cf749236ad020364e14d77bc93 -address /run/k3s/containerd/containerd.sock root 6158 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id bec5780a5c73fa3154aa3b5ee26cdf23202db821205893e7e66ae17e6103e97b -address /run/k3s/containerd/containerd.sock root 7366 1 0 Sep11 ? 00:00:28 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id a81b78845bdcaef710314c93e5ea0d0617f37a8929472f7b570ab90c6667f57f -address /run/k3s/containerd/containerd.sock root 97274 1 0 16:13 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id c90652c935d9e79af45b9a9ac2b4fe315e2a761a0525737fdb95c680123a164c -address /run/k3s/containerd/containerd.sock root 98309 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 431a2763636488efd7d104c228d41f4f2ecd8c06a7fc375d8977ab0d238936a8 -address /run/k3s/containerd/containerd.sock root 98493 1 0 16:16 ? 00:00:00 /var/lib/rancher/k3s/data/3cdacaf539fc388d8e542a8d643948e3c7bfa4a7e91b7521102325e0ce8581b6/bin/containerd-shim-runc-v2 -namespace k8s.io -id 5b480d2fa55c8cc0105ec1902887040c017f03d5b1eb6c73c24bb9d523ad9b37 -address /run/k3s/containerd/containerd.sock +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address' +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.1 +``` + +**Expected Result**: + +```console +'cert-file' is present AND 'key-file' is present +``` + +**Returned Value**: + +```console +cert-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.key +``` + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and set the below parameter. +--client-cert-auth="true" + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.2 +``` + +**Expected Result**: + +```console +'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +client-cert-auth: true +``` + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.3 +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.4 +``` + +**Expected Result**: + +```console +'cert-file' is present AND 'key-file' is present +``` + +**Returned Value**: + +```console +cert-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.key +``` + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and set the below parameter. +--peer-client-cert-auth=true + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.5 +``` + +**Expected Result**: + +```console +'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +client-cert-auth: true +``` + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.6 +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit Script:** `check_for_k3s_etcd.sh` + +```bash +#!/bin/bash + +# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) +# before it checks the requirement +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + + +if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then + case $1 in + "1.1.11") + echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; + "1.2.29") + echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; + "2.1") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.2") + echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.3") + echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.4") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; + "2.5") + echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; + "2.6") + echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; + "2.7") + echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; + esac +else +# If another database is running, return whatever is required to pass the scan + case $1 in + "1.1.11") + echo "700";; + "1.2.29") + echo "--etcd-certfile AND --etcd-keyfile";; + "2.1") + echo "cert-file AND key-file";; + "2.2") + echo "--client-cert-auth=true";; + "2.3") + echo "false";; + "2.4") + echo "peer-cert-file AND peer-key-file";; + "2.5") + echo "--client-cert-auth=true";; + "2.6") + echo "--peer-auto-tls=false";; + "2.7") + echo "--trusted-ca-file";; + esac +fi + +``` + +**Audit Execution:** + +```bash +./check_for_k3s_etcd.sh 2.7 +``` + +**Expected Result**: + +```console +'trusted-ca-file' is present +``` + +**Returned Value**: + +```console +trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +### 3.1.2 Service account token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of service account tokens. + +### 3.1.3 Bootstrap token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of bootstrap tokens. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Manual) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-policy-file' +``` + +**Expected Result**: + +```console +'--audit-policy-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable - All configuration is passed in as arguments at container run time. + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable. + All configuration is passed in as arguments at container run time. + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +**Returned Value**: + +```console +600 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /var/lib/rancher/k3s/server/cred/admin.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit:** + +```bash +stat -c %a /var/lib/rancher/k3s/server/tls/server-ca.crt +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +**Returned Value**: + +```console +644 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/k3s/server/tls/client-ca.crt +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/kubelet/config.yaml + +### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/kubelet/config.yaml +Not Applicable. +All configuration is passed in as arguments at container run time. + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "anonymous-auth" | grep -v grep; else echo "--anonymous-auth=false"; fi' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "authorization-mode" | grep -v grep; else echo "--authorization-mode=Webhook"; fi' +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "client-ca-file" | grep -v grep; else echo "--client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt"; fi' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +Sep 11 20:52:00 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:00Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'read-only-port' +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:15 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:15Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-12-34 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=af02ecbc-1e4e-422e-8b4d-4b2aa24a9d46 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'streaming-connection-idle-timeout' +``` + +### 4.2.6 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'make-iptables-util-chains' +``` + +**Expected Result**: + +```console +'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present +``` + +**Returned Value**: + +```console +Sep 11 20:52:15 ip-172-31-12-34 k3s[2340]: time="2023-09-11T20:52:15Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-12-34 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=af02ecbc-1e4e-422e-8b4d-4b2aa24a9d46 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" +``` + +### 4.2.7 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable. + +### 4.2.8 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--event-qps' is present OR '--event-qps' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.9 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** Not Applicable + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service +Permissive - When generating serving certificates, functionality could break in conjunction with hostname overrides which are required for certain cloud providers. + +### 4.2.10 Ensure that the --rotate-certificates argument is not set to false (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--rotate-certificates' is present OR '--rotate-certificates' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.11 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** pass + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable. + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/kubelet/config.yaml +``` + +**Expected Result**: + +```console +'RotateKubeletServerCertificate' is present OR 'RotateKubeletServerCertificate' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.12 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +### 4.2.13 Ensure that a limit is set on pod PIDs (Manual) + + +**Result:** warn + +**Remediation:** +Decide on an appropriate level for this parameter and set it, +either via the --pod-max-pids command line parameter or the PodPidsLimit configuration file setting. + +**Audit:** + +```bash +/bin/ps -fC containerd +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--pod-max-pids' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 527 1 0 Sep11 ? 00:01:28 /usr/bin/containerd root 2361 2340 3 Sep11 ? 00:40:19 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Manual) + + +**Result:** pass + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +**Audit Script:** `check_for_default_sa.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) +if [[ ${count_sa} -gt 0 ]]; then + echo "false" + exit +fi + +for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") +do + for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[]?.kind=="ServiceAccount" and .subjects[]?.name=="default") or (.subjects[]?.kind=="Group" and .subjects[]?.name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') + do + read kind name <<<$(IFS=","; echo $result) + resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[]? != "podsecuritypolicies")' | wc -l) + if [[ ${resource_count} -gt 0 ]]; then + echo "false" + exit + fi + done +done + + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_default_sa.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +### 5.1.9 Minimize access to create persistent volumes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to PersistentVolume objects in the cluster. + +### 5.1.10 Minimize access to the proxy sub-resource of nodes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the proxy sub-resource of node objects. + +### 5.1.11 Minimize access to the approval sub-resource of certificatesigningrequests objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the approval sub-resource of certificatesigningrequest objects. + +### 5.1.12 Minimize access to webhook configuration objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the validatingwebhookconfigurations or mutatingwebhookconfigurations objects + +### 5.1.13 Minimize access to the service account token creation (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the token sub-resource of serviceaccount objects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +### 5.2.7 Minimize the admission of root containers (Automated) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Automated) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md deleted file mode 100644 index 16614a7e520..00000000000 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md +++ /dev/null @@ -1,3148 +0,0 @@ ---- -title: K3s Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25 ---- - -This document is a companion to the [K3s Hardening Guide](../../../../pages-for-subheaders/k3s-hardening-guide.md), which provides prescriptive guidance on how to harden K3s clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25 | - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -Each control in the CIS Kubernetes Benchmark was evaluated against a K3s cluster that was configured according to the accompanying hardening guide. - -Where control audits differ from the original CIS benchmark, the audit commands specific to K3s are provided for testing. - -These are the possible results for each control: - -- **Pass** - The K3s cluster passes the audit outlined in the benchmark. -- **Not Applicable** - The control is not applicable to K3s because of how it is designed to operate. The remediation section explains why. -- **Warn** - The control is manual in the CIS benchmark and it depends on the cluster's use-case or some other factor that must be determined by the cluster operator. These controls have been evaluated to ensure K3s doesn't prevent their implementation, but no further configuration or auditing of the cluster has been performed. - -This guide makes the assumption that K3s is running as a Systemd unit. Your installation may vary. Adjust the "audit" commands to fit your scenario. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Control Plane Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the -control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-apiserver.yaml - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-controller-manager.yaml - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /etc/kubernetes/manifests/kube-scheduler.yaml - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 /etc/kubernetes/manifests/etcd.yaml - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /etc/kubernetes/manifests/etcd.yaml - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 1.1.11 -``` - -**Expected Result**: - -```console -'700' is equal to '700' -``` - -**Returned Value**: - -```console -700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** Not Applicable - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/admin.conf - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 scheduler - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root scheduler - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 controllermanager - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root controllermanager - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/server/tls -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown -R root:root /etc/kubernetes/pki/ - -**Audit:** - -```bash -find /var/lib/rancher/k3s/server/tls | xargs stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root root:root -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Manual) - - -**Result:** warn - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 644 /etc/kubernetes/pki/*.crt - -**Audit:** - -```bash -stat -c %n %a /var/lib/rancher/k3s/server/tls/*.crt -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) - - -**Result:** warn - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /etc/kubernetes/pki/*.key - -**Audit:** - -```bash -stat -c %n %a /var/lib/rancher/k3s/server/tls/*.key -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth' -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep containerd | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' is present OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 519 1 0 22:09 ? 00:00:00 /usr/bin/containerd root 801 1 0 22:09 ? 00:00:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 3864 1 0 22:31 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id d00174abbc275f6bb85c7f0be1d3154b9c91982a10b9dba6b5cb280f4d4c531d -address /run/k3s/containerd/containerd.sock root 4105 1 0 22:31 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 7c2b546b4d2380bcb51278661f34cff94fad2ba06978e13f8f1b92dafcc89d43 -address /run/k3s/containerd/containerd.sock root 4206 1 0 22:31 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 68d8a55ff4663985be004608dbf78b0362f5522e18490c81d4c8dc9963de1556 -address /run/k3s/containerd/containerd.sock root 5374 1 0 22:31 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id ca0ae9e0b37dfd7b1ce05f72e1bc5a1be8f5cb08f2b4543081536de3bdbc925d -address /run/k3s/containerd/containerd.sock root 5443 1 0 22:31 ? 00:00:01 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 3ea3c1cdbbd5adb8efd5c67a46aadd0fca9918dc0ad1f7cafe38b83171e3dc1b -address /run/k3s/containerd/containerd.sock root 7130 1 0 22:32 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4d838297d35a31003106ac5989c3547433985bb2964b47baad12cee6e375645e -address /run/k3s/containerd/containerd.sock root 7639 1 0 22:32 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 341cb9bcd8486aa2f1acb8e1ae51baebd630ac6ed266643266c34d677f61c7d0 -address /run/k3s/containerd/containerd.sock root 10308 1 0 23:17 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id c534fbee8e0d06fd9b29bf8fc70a138975c6b18db25f1faf2615677dfdb4199e -address /run/k3s/containerd/containerd.sock root 11370 1 0 23:18 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 4ff4b8776dac7a35b83616d341dbe4d5a689ac7fb9b8eee8db5978e3968380ea -address /run/k3s/containerd/containerd.sock root 13736 13723 2 23:21 ? 00:00:10 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/containerd --root /var/lib/rancher/k3s/agent/containerd root 16022 1 0 23:29 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 9027256349086e458119478e5e00384b1b76fbf5e6dbee23699f596a88d9f2bc -address /run/k3s/containerd/containerd.sock root 16159 1 0 23:29 ? 00:00:00 /var/lib/rancher/k3s/data/630c40ff866a3db218a952ebd4fd2a5cfe1543a1a467e738cb46a2ad4012d6f1/bin/containerd-shim-runc-v2 -namespace k8s.io -id 929bf369fc5881654f4c1925624151ddb7cea51073267b8d213d966ba45406f3 -address /run/k3s/containerd/containerd.sock -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority' -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode' -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'AlwaysPullImages' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'ServiceAccount' -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins' -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port' -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling' -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-path' -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxage' -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxbackup' -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-log-maxsize' -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.23 Ensure that the --request-timeout argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameter as appropriate and if needed. -For example, --request-timeout=300s - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'request-timeout' -``` - -**Expected Result**: - -```console -'--request-timeout' is not present OR '--request-timeout' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-lookup' -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.25 Ensure that the --service-account-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'service-account-key-file' -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 1.2.29 -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep -A1 'Running kube-apiserver' | tail -n2 -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile' -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'encryption-provider-config' -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 1.2.31 Ensure that encryption providers are appropriately configured (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit:** - -```bash -grep aescbc /path/to/encryption-config.json -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites' -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) - - -**Result:** warn - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold' -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling' -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials' -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file' -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file' -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'bind-address' -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-controller-manager --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/k3s/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/k3s/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/k3s/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/k3s/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true" -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address' -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-scheduler --authentication-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/k3s/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259" -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.1 -``` - -**Expected Result**: - -```console -'cert-file' is present AND 'key-file' is present -``` - -**Returned Value**: - -```console -cert-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/server-client.key -``` - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and set the below parameter. ---client-cert-auth="true" - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.2 -``` - -**Expected Result**: - -```console -'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -client-cert-auth: true -``` - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.3 -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.4 -``` - -**Expected Result**: - -```console -'cert-file' is present AND 'key-file' is present -``` - -**Returned Value**: - -```console -cert-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.crt key-file: /var/lib/rancher/k3s/server/tls/etcd/peer-server-client.key -``` - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and set the below parameter. ---peer-client-cert-auth=true - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.5 -``` - -**Expected Result**: - -```console -'--client-cert-auth' is present OR 'client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -client-cert-auth: true -``` - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.6 -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -error: process ID list syntax error Usage: ps [options] Try 'ps --help ' or 'ps --help ' for additional help text. For more details see ps(1). cat: /proc//environ: No such file or directory -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Manual) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /var/lib/rancher/k3s/server/db/etcd/config on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit Script:** `check_for_k3s_etcd.sh` - -```bash -#!/bin/bash - -# This script is used to ensure that k3s is actually running etcd (and not other databases like sqlite3) -# before it checks the requirement -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - - -if [[ "$(journalctl -D /var/log/journal -u k3s | grep 'Managed etcd cluster initializing' | grep -v grep | wc -l)" -gt 0 ]]; then - case $1 in - "1.1.11") - echo $(stat -c %a /var/lib/rancher/k3s/server/db/etcd);; - "1.2.29") - echo $(journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-');; - "2.1") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.2") - echo $(grep -A 5 'client-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.3") - echo $(grep 'auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.4") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep -E 'cert-file|key-file');; - "2.5") - echo $(grep -A 5 'peer-transport-security' /var/lib/rancher/k3s/server/db/etcd/config | grep 'client-cert-auth');; - "2.6") - echo $(grep 'peer-auto-tls' /var/lib/rancher/k3s/server/db/etcd/config);; - "2.7") - echo $(grep 'trusted-ca-file' /var/lib/rancher/k3s/server/db/etcd/config);; - esac -else -# If another database is running, return whatever is required to pass the scan - case $1 in - "1.1.11") - echo "700";; - "1.2.29") - echo "--etcd-certfile AND --etcd-keyfile";; - "2.1") - echo "cert-file AND key-file";; - "2.2") - echo "--client-cert-auth=true";; - "2.3") - echo "false";; - "2.4") - echo "peer-cert-file AND peer-key-file";; - "2.5") - echo "--client-cert-auth=true";; - "2.6") - echo "--peer-auto-tls=false";; - "2.7") - echo "--trusted-ca-file";; - esac -fi - -``` - -**Audit Execution:** - -```bash -./check_for_k3s_etcd.sh 2.7 -``` - -**Expected Result**: - -```console -'trusted-ca-file' is present -``` - -**Returned Value**: - -```console -trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt trusted-ca-file: /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Manual) - - -**Result:** warn - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'audit-policy-file' -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chmod 644 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig -``` - -**Expected Result**: - -```console -'permissions' is present OR '/var/lib/rancher/k3s/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/agent/kubeproxy.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is present OR '/var/lib/rancher/k3s/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/agent/kubelet.kubeconfig -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /var/lib/rancher/k3s/server/cred/admin.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/agent/kubelet.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit:** - -```bash -stat -c %a /var/lib/rancher/k3s/server/tls/server-ca.crt -``` - -**Expected Result**: - -```console -'644' is equal to '644' OR '640' is present OR '600' is present OR '444' is present OR '440' is present OR '400' is present OR '000' is present -``` - -**Returned Value**: - -```console -644 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/k3s/server/tls/client-ca.crt -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /var/lib/kubelet/config.yaml - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /var/lib/kubelet/config.yaml - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "anonymous-auth" | grep -v grep; else echo "--anonymous-auth=false"; fi' -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "authorization-mode" | grep -v grep; else echo "--authorization-mode=Webhook"; fi' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/sh -c 'if test $(journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | wc -l) -gt 0; then journalctl -D /var/log/journal -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "client-ca-file" | grep -v grep; else echo "--client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt"; fi' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:42 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:42Z" level=info msg="Running kube-apiserver --admission-control-config-file=/etc/rancher/k3s/config/rancher-psact.yaml --advertise-port=6443 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,k3s --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/k3s/server/logs/audit.log --audit-policy-file=/var/lib/rancher/k3s/server/audit.yaml --authorization-mode=Node,RBAC --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/k3s/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/k3s/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/k3s/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,ServiceAccount --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/k3s/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/k3s/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/k3s/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/k3s/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/k3s/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/k3s/server/tls/client-auth-proxy.key --request-timeout=300s --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/k3s/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6444 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-account-lookup=true --service-account-signing-key-file=/var/lib/rancher/k3s/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.key" -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'read-only-port' -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:44 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:44Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-124 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c42d922-ed1e-4e15-8414-d399d179d897 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'streaming-connection-idle-timeout' -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'protect-kernel-defaults' -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -Feb 27 23:21:44 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:44Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-124 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c42d922-ed1e-4e15-8414-d399d179d897 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 | grep 'make-iptables-util-chains' -``` - -**Expected Result**: - -```console -'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present -``` - -**Returned Value**: - -```console -Feb 27 23:21:44 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:44Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-124 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c42d922-ed1e-4e15-8414-d399d179d897 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -journalctl -D /var/log/journal -u k3s | grep 'Running kubelet' | tail -n1 -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -Feb 27 23:21:44 ip-172-31-31-124 k3s[13723]: time="2023-02-27T23:21:44Z" level=info msg="Running kubelet --address=0.0.0.0 --allowed-unsafe-sysctls=net.ipv4.ip_forward,net.ipv6.conf.all.forwarding --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/k3s/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-124 --kubeconfig=/var/lib/rancher/k3s/agent/kubelet.kubeconfig --make-iptables-util-chains=true --node-labels=cattle.io/os=linux,rke.cattle.io/machine=5c42d922-ed1e-4e15-8414-d399d179d897 --pod-infra-container-image=rancher/mirrored-pause:3.6 --pod-manifest-path=/var/lib/rancher/k3s/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --tls-cert-file=/var/lib/rancher/k3s/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/k3s/agent/serving-kubelet.key" -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC containerd -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Manual) - - -**Result:** warn - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** warn - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) - - -**Result:** warn - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md index 34bb63f89f0..9c6d1369a90 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md @@ -2,6 +2,10 @@ title: RKE Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.23 --- + + + + This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md deleted file mode 100644 index 25108b848b5..00000000000 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md +++ /dev/null @@ -1,3084 +0,0 @@ ---- -title: RKE Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.24 ---- - -This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.23 | Kubernetes v1.24 | - -This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.23. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -Rancher and RKE install Kubernetes services via Docker containers. Configuration is defined by arguments passed to the container at the time of initialization, not via configuration files. - -Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Control Plane Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. -All configuration is passed in as arguments at container run time. - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. -All configuration is passed in as arguments at container run time. - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. -All configuration is passed in as arguments at container run time. - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. -All configuration is passed in as arguments at container run time. - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 permissions=600 -``` - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root -``` - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit:** - -```bash -stat -c %a /node/var/lib/etcd -``` - -**Expected Result**: - -```console -'700' is equal to '700' -``` - -**Returned Value**: - -```console -700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** Not Applicable - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the master node. -For example, -chown -R root:root /etc/kubernetes/pki/ - -**Audit Script:** `check_files_owner_in_dir.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the owner is set to root:root for -# the given directory and all the files in it -# -# inputs: -# $1 = /full/path/to/directory -# -# outputs: -# true/false - -INPUT_DIR=$1 - -if [[ "${INPUT_DIR}" == "" ]]; then - echo "false" - exit -fi - -if [[ $(stat -c %U:%G ${INPUT_DIR}) != "root:root" ]]; then - echo "false" - exit -fi - -statInfoLines=$(stat -c "%n %U:%G" ${INPUT_DIR}/*) -while read -r statInfoLine; do - f=$(echo ${statInfoLine} | cut -d' ' -f1) - p=$(echo ${statInfoLine} | cut -d' ' -f2) - - if [[ $(basename "$f" .pem) == "kube-etcd-"* ]]; then - if [[ "$p" != "root:root" && "$p" != "etcd:etcd" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "root:root" ]]; then - echo "false" - exit - fi - fi -done <<< "${statInfoLines}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_owner_in_dir.sh /node/etc/kubernetes/ssl -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the master node. -For example, -chmod -R 644 /etc/kubernetes/pki/*.crt - -**Audit Script:** `check_files_permissions.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the file permissions are set to 644 or -# more restrictive for all files in a given directory or a wildcard -# selection of files -# -# inputs: -# $1 = /full/path/to/directory or /path/to/fileswithpattern -# ex: !(*key).pem -# -# $2 (optional) = permission (ex: 600) -# -# outputs: -# true/false - -# Turn on "extended glob" for use of '!' in wildcard -shopt -s extglob - -# Turn off history to avoid surprises when using '!' -set -H - -USER_INPUT=$1 - -if [[ "${USER_INPUT}" == "" ]]; then - echo "false" - exit -fi - - -if [[ -d ${USER_INPUT} ]]; then - PATTERN="${USER_INPUT}/*" -else - PATTERN="${USER_INPUT}" -fi - -PERMISSION="" -if [[ "$2" != "" ]]; then - PERMISSION=$2 -fi - -FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) - -while read -r fileInfo; do - p=$(echo ${fileInfo} | cut -d' ' -f2) - - if [[ "${PERMISSION}" != "" ]]; then - if [[ "$p" != "${PERMISSION}" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then - echo "false" - exit - fi - fi -done <<< "${FILES_PERMISSIONS}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_permissions.sh '/node/etc/kubernetes/ssl/!(*key).pem' -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /etc/kubernetes/ssl/*key.pem - -**Audit Script:** `check_files_permissions.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the file permissions are set to 644 or -# more restrictive for all files in a given directory or a wildcard -# selection of files -# -# inputs: -# $1 = /full/path/to/directory or /path/to/fileswithpattern -# ex: !(*key).pem -# -# $2 (optional) = permission (ex: 600) -# -# outputs: -# true/false - -# Turn on "extended glob" for use of '!' in wildcard -shopt -s extglob - -# Turn off history to avoid surprises when using '!' -set -H - -USER_INPUT=$1 - -if [[ "${USER_INPUT}" == "" ]]; then - echo "false" - exit -fi - - -if [[ -d ${USER_INPUT} ]]; then - PATTERN="${USER_INPUT}/*" -else - PATTERN="${USER_INPUT}" -fi - -PERMISSION="" -if [[ "$2" != "" ]]; then - PERMISSION=$2 -fi - -FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) - -while read -r fileInfo; do - p=$(echo ${fileInfo} | cut -d' ' -f2) - - if [[ "${PERMISSION}" != "" ]]; then - if [[ "$p" != "${PERMISSION}" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then - echo "false" - exit - fi - fi -done <<< "${FILES_PERMISSIONS}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_permissions.sh '/node/etc/kubernetes/ssl/*key.pem' -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-https' is present OR '--kubelet-https' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 1.2.31 Ensure that encryption providers are appropriately configured (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit Script:** `check_encryption_provider_config.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to check the encrption provider config is set to aesbc -# -# outputs: -# true/false - -# TODO: Figure out the file location from the kube-apiserver commandline args -ENCRYPTION_CONFIG_FILE="/node/etc/kubernetes/ssl/encryption.yaml" - -if [[ ! -f "${ENCRYPTION_CONFIG_FILE}" ]]; then - echo "false" - exit -fi - -for provider in "$@" -do - if grep "$provider" "${ENCRYPTION_CONFIG_FILE}"; then - echo "true" - exit - fi -done - -echo "false" -exit - -``` - -**Audit Execution:** - -```bash -./check_encryption_provider_config.sh aescbc -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -- aescbc: true -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--terminated-pod-gc-threshold' is present -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -Cluster provisioned by RKE handles certificate rotation directly through RKE. - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is present OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 5056 5035 2 18:52 ? 00:00:05 kube-controller-manager --cloud-provider= --terminated-pod-gc-threshold=1000 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --node-monitor-grace-period=40s --allow-untagged-cloud=true --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --configure-cloud-routes=false --leader-elect=true --profiling=false --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --pod-eviction-timeout=5m0s --v=2 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --enable-hostpath-provisioner=false --use-service-account-credentials=true -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5209 5190 0 18:53 ? 00:00:01 kube-scheduler --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is present OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 5209 5190 0 18:53 ? 00:00:01 kube-scheduler --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--cert-file' is present AND '--key-file' is present -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 2 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and set the below parameter. ---client-cert-auth="true" - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 4 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-26-105 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem ETCDCTL_ENDPOINTS=https://172.31.26.105:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/root -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--peer-cert-file' is present AND '--peer-key-file' is present -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 3 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and set the below parameter. ---peer-client-cert-auth=true - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--peer-client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 2 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-26-105 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem ETCDCTL_ENDPOINTS=https://172.31.26.105:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/root -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--trusted-ca-file' is present -``` - -**Returned Value**: - -```console -root 4720 4700 3 18:52 ? 00:00:08 /usr/local/bin/etcd --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --advertise-client-urls=https://172.31.26.105:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --listen-peer-urls=https://172.31.26.105:2380 --initial-cluster=etcd-ip-172-31-26-105=https://172.31.26.105:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-26-105-key.pem --heartbeat-interval=500 --data-dir=/var/lib/rancher/etcd/ --listen-client-urls=https://172.31.26.105:2379 --name=etcd-ip-172-31-26-105 --initial-cluster-state=new --client-cert-auth=true --election-timeout=5000 --initial-advertise-peer-urls=https://172.31.26.105:2380 root 4882 4861 15 18:52 ? 00:00:42 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false root 18033 17938 2 18:57 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Automated) - - -**Result:** pass - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-policy-file' is present -``` - -**Returned Value**: - -```console -root 4882 4861 15 18:52 ? 00:00:43 kube-apiserver --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --api-audiences=unknown --audit-log-maxsize=100 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-servers=https://172.31.26.105:2379 --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --anonymous-auth=false --secure-port=6443 --runtime-config=policy/v1beta1/podsecuritypolicy=true --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --service-node-port-range=30000-32767 --service-account-issuer=rke --service-account-lookup=true --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --authentication-token-webhook-cache-ttl=5s --advertise-address=172.31.26.105 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --admission-control-config-file=/etc/kubernetes/admission.yaml --audit-log-maxbackup=10 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --requestheader-username-headers=X-Remote-User --requestheader-group-headers=X-Remote-Group --authorization-mode=Node,RBAC --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --cloud-provider= --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --bind-address=0.0.0.0 --audit-log-maxage=30 --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --service-cluster-ip-range=10.43.0.0/16 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allow-privileged=true --profiling=false -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. -All configuration is passed in as arguments at container run time. - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. -All configuration is passed in as arguments at container run time. - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive OR '/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml' is not present -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c %U:%G /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present OR '/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml' is not present -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /etc/kubernetes/ssl/kubecfg-kube-node.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/kubernetes/ssl/kubecfg-kube-node.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit:** - -```bash -stat -c permissions=%a /node/etc/kubernetes/ssl/kube-ca.pem -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit:** - -```bash -stat -c %U:%G /node/etc/kubernetes/ssl/kube-ca.pem -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /var/lib/kubelet/config.yaml - -Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. -All configuration is passed in as arguments at container run time. - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /var/lib/kubelet/config.yaml - -Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. -All configuration is passed in as arguments at container run time. - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--streaming-connection-idle-timeout' is not equal to '0' OR '--streaming-connection-idle-timeout' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -Clusters provisioned by RKE set the --hostname-override to avoid any hostname configuration errors - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--event-qps' is equal to '0' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -Clusters provisioned by RKE handles certificate rotation directly through RKE. - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 5796 5377 2 18:53 ? 00:00:06 kubelet --anonymous-auth=false --cloud-provider= --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --root-dir=/var/lib/kubelet --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --fail-swap-on=false --hostname-override=ip-172-31-26-105 --authentication-token-webhook=true --cgroups-per-qos=True --cluster-dns=10.43.0.10 --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --address=0.0.0.0 --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-26-105.pem --streaming-connection-idle-timeout=30m --v=2 --protect-kernel-defaults=true --container-runtime=remote --event-qps=0 --feature-gates=RotateKubeletServerCertificate=true --authorization-mode=Webhook --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --cluster-domain=cluster.local --pod-infra-container-image=rancher/mirrored-pause:3.6 --read-only-port=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --node-ip=172.31.26.105 --resolv-conf=/etc/resolv.conf --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Automated) - - -**Result:** pass - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -**Audit Script:** `check_for_default_sa.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) -if [[ ${count_sa} -gt 0 ]]; then - echo "false" - exit -fi - -for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") -do - for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[].kind=="ServiceAccount" and .subjects[].name=="default") or (.subjects[].kind=="Group" and .subjects[].name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') - do - read kind name <<<$(IFS=","; echo $result) - resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[] != "podsecuritypolicies")' | wc -l) - if [[ ${resource_count} -gt 0 ]]; then - echo "false" - exit - fi - done -done - - -echo "true" -``` - -**Audit Execution:** - -```bash -./check_for_default_sa.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): serviceaccounts is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "serviceaccounts" in API group "" at the cluster scope Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-fleet-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-impersonation-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cis-operator-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "default" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-node-lease" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-public" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "local" true -``` - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** warn - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) - - -**Result:** warn - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -**Audit Script:** `check_for_network_policies.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -for namespace in $(kubectl get namespaces --all-namespaces -o json | jq -r '.items[].metadata.name'); do - policy_count=$(kubectl get networkpolicy -n ${namespace} -o json | jq '.items | length') - if [[ ${policy_count} -eq 0 ]]; then - echo "false" - exit - fi -done - -echo "true" - -``` - -**Audit Execution:** - -```bash -./check_for_network_policies.sh -``` - -**Expected Result**: - -```console -'true' is present -``` - -**Returned Value**: - -```console -true -``` - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Automated) - - -**Result:** pass - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. - -**Audit Script:** `check_for_default_ns.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count=$(kubectl get all -n default -o json | jq .items[] | jq -r 'select((.metadata.name!="kubernetes"))' | jq .metadata.name | wc -l) -if [[ ${count} -gt 0 ]]; then - echo "false" - exit -fi - -echo "true" - - -``` - -**Audit Execution:** - -```bash -./check_for_default_ns.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): replicationcontrollers is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "replicationcontrollers" in API group "" in the namespace "default" Error from server (Forbidden): services is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "services" in API group "" in the namespace "default" Error from server (Forbidden): daemonsets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "daemonsets" in API group "apps" in the namespace "default" Error from server (Forbidden): deployments.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "deployments" in API group "apps" in the namespace "default" Error from server (Forbidden): replicasets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "replicasets" in API group "apps" in the namespace "default" Error from server (Forbidden): statefulsets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "statefulsets" in API group "apps" in the namespace "default" Error from server (Forbidden): horizontalpodautoscalers.autoscaling is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "horizontalpodautoscalers" in API group "autoscaling" in the namespace "default" Error from server (Forbidden): cronjobs.batch is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "cronjobs" in API group "batch" in the namespace "default" Error from server (Forbidden): jobs.batch is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "jobs" in API group "batch" in the namespace "default" true -``` - diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md new file mode 100644 index 00000000000..5f3c20fb37f --- /dev/null +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md @@ -0,0 +1,3047 @@ +--- +title: RKE Self-Assessment Guide - CIS Benchmark v1.24 - K8s v1.24 +--- + + + + + +This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.24 | Kubernetes v1.24 | + +This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.24. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +Rancher and RKE install Kubernetes services via Docker containers. Configuration is defined by arguments passed to the container at the time of initialization, not via configuration files. + +Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. +All configuration is passed in as arguments at container run time. + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. +All configuration is passed in as arguments at container run time. + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=644 +``` + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root root:root +``` + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit:** + +```bash +stat -c %a /node/var/lib/etcd +``` + +**Expected Result**: + +```console +'700' is equal to '700' +``` + +**Returned Value**: + +```console +700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** Not Applicable + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the master node. +For example, +chown -R root:root /etc/kubernetes/pki/ + +**Audit Script:** `check_files_owner_in_dir.sh` + +```bash +#!/usr/bin/env bash + +# This script is used to ensure the owner is set to root:root for +# the given directory and all the files in it +# +# inputs: +# $1 = /full/path/to/directory +# +# outputs: +# true/false + +INPUT_DIR=$1 + +if [[ "${INPUT_DIR}" == "" ]]; then + echo "false" + exit +fi + +if [[ $(stat -c %U:%G ${INPUT_DIR}) != "root:root" ]]; then + echo "false" + exit +fi + +statInfoLines=$(stat -c "%n %U:%G" ${INPUT_DIR}/*) +while read -r statInfoLine; do + f=$(echo ${statInfoLine} | cut -d' ' -f1) + p=$(echo ${statInfoLine} | cut -d' ' -f2) + + if [[ $(basename "$f" .pem) == "kube-etcd-"* ]]; then + if [[ "$p" != "root:root" && "$p" != "etcd:etcd" ]]; then + echo "false" + exit + fi + else + if [[ "$p" != "root:root" ]]; then + echo "false" + exit + fi + fi +done <<< "${statInfoLines}" + + +echo "true" +exit + +``` + +**Audit Execution:** + +```bash +./check_files_owner_in_dir.sh /node/etc/kubernetes/ssl +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +find /node/etc/kubernetes/ssl/ -name '*.pem' ! -name '*key.pem' -exec chmod -R 600 {} + + +**Audit:** + +```bash +find /node/etc/kubernetes/ssl/ -name '*.pem' ! -name '*key.pem' | xargs stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=644 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /etc/kubernetes/ssl/*key.pem + +**Audit Script:** `check_files_permissions.sh` + +```bash +#!/usr/bin/env bash + +# This script is used to ensure the file permissions are set to 644 or +# more restrictive for all files in a given directory or a wildcard +# selection of files +# +# inputs: +# $1 = /full/path/to/directory or /path/to/fileswithpattern +# ex: !(*key).pem +# +# $2 (optional) = permission (ex: 600) +# +# outputs: +# true/false + +# Turn on "extended glob" for use of '!' in wildcard +shopt -s extglob + +# Turn off history to avoid surprises when using '!' +set -H + +USER_INPUT=$1 + +if [[ "${USER_INPUT}" == "" ]]; then + echo "false" + exit +fi + + +if [[ -d ${USER_INPUT} ]]; then + PATTERN="${USER_INPUT}/*" +else + PATTERN="${USER_INPUT}" +fi + +PERMISSION="" +if [[ "$2" != "" ]]; then + PERMISSION=$2 +fi + +FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) + +while read -r fileInfo; do + p=$(echo ${fileInfo} | cut -d' ' -f2) + + if [[ "${PERMISSION}" != "" ]]; then + if [[ "$p" != "${PERMISSION}" ]]; then + echo "false" + exit + fi + else + if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then + echo "false" + exit + fi + fi +done <<< "${FILES_PERMISSIONS}" + + +echo "true" +exit + +``` + +**Audit Execution:** + +```bash +./check_files_permissions.sh '/node/etc/kubernetes/ssl/*key.pem' +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --kubelet-https parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-https' is present OR '--kubelet-https' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-certificate-authority' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.18 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxsize' is greater or equal to 100 +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 1.2.31 Ensure that encryption providers are appropriately configured (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit Script:** `check_encryption_provider_config.sh` + +```bash +#!/usr/bin/env bash + +# This script is used to check the encrption provider config is set to aesbc +# +# outputs: +# true/false + +# TODO: Figure out the file location from the kube-apiserver commandline args +ENCRYPTION_CONFIG_FILE="/node/etc/kubernetes/ssl/encryption.yaml" + +if [[ ! -f "${ENCRYPTION_CONFIG_FILE}" ]]; then + echo "false" + exit +fi + +for provider in "$@" +do + if grep "$provider" "${ENCRYPTION_CONFIG_FILE}"; then + echo "true" + exit + fi +done + +echo "false" +exit + +``` + +**Audit Execution:** + +```bash +./check_encryption_provider_config.sh aescbc +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +- aescbc: true +``` + +### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true + +Cluster provisioned by RKE handles certificate rotation directly through RKE. + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 3690 3671 1 Sep11 ? 00:20:42 kube-controller-manager --service-cluster-ip-range=10.43.0.0/16 --configure-cloud-routes=false --enable-hostpath-provisioner=false --terminated-pod-gc-threshold=1000 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --v=2 --pod-eviction-timeout=5m0s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --cluster-cidr=10.42.0.0/16 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --allocate-node-cidrs=true --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --feature-gates=RotateKubeletServerCertificate=true --leader-elect=true --profiling=false --node-monitor-grace-period=40s --allow-untagged-cloud=true --use-service-account-credentials=true +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 3859 3838 0 Sep11 ? 00:03:44 kube-scheduler --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 3859 3838 0 Sep11 ? 00:03:44 kube-scheduler --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--cert-file' is present AND '--key-file' is present +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:08 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 5 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and set the below parameter. +--client-cert-auth="true" + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:08 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 4 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-7-100 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem ETCDCTL_ENDPOINTS=https://127.0.0.1:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--peer-cert-file' is present AND '--peer-key-file' is present +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 2 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and set the below parameter. +--peer-client-cert-auth=true + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--peer-client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 2 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-7-100 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem ETCDCTL_ENDPOINTS=https://127.0.0.1:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--trusted-ca-file' is present +``` + +**Returned Value**: + +```console +etcd 3369 3348 2 Sep11 ? 00:26:05 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd-ip-172-31-7-100=https://172.31.7.100:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --client-cert-auth=true --election-timeout=5000 --name=etcd-ip-172-31-7-100 --listen-client-urls=https://0.0.0.0:2379 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-state=new --advertise-client-urls=https://172.31.7.100:2379 --heartbeat-interval=500 --initial-advertise-peer-urls=https://172.31.7.100:2380 --listen-peer-urls=https://0.0.0.0:2380 --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-7-100-key.pem --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 root 3528 3509 7 Sep11 ? 01:24:09 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s root 1057543 1057522 2 16:15 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.24-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Automated) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-policy-file' is present +``` + +**Returned Value**: + +```console +root 3528 3509 7 Sep11 ? 01:24:10 kube-apiserver --service-cluster-ip-range=10.43.0.0/16 --anonymous-auth=false --profiling=false --advertise-address=172.31.7.100 --audit-log-maxsize=100 --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --etcd-prefix=/registry --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-username-headers=X-Remote-User --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --audit-policy-file=/etc/kubernetes/audit-policy.yaml --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --storage-backend=etcd3 --service-node-port-range=30000-32767 --bind-address=0.0.0.0 --api-audiences=unknown --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --runtime-config=policy/v1beta1/podsecuritypolicy=true --allow-privileged=true --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,PodSecurityPolicy,EventRateLimit --service-account-issuer=rke --requestheader-allowed-names=kube-apiserver-proxy-client --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-format=json --authorization-mode=Node,RBAC --etcd-servers=https://172.31.7.100:2379 --service-account-lookup=true --secure-port=6443 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --audit-log-maxage=30 --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --audit-log-maxbackup=10 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --authentication-token-webhook-cache-ttl=5s +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. +All configuration is passed in as arguments at container run time. + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. +All configuration is passed in as arguments at container run time. + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit:** + +```bash +stat -c permissions=%a /node/etc/kubernetes/ssl/kube-ca.pem +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit:** + +```bash +stat -c %U:%G /node/etc/kubernetes/ssl/kube-ca.pem +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/kubelet/config.yaml + +Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. +All configuration is passed in as arguments at container run time. + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/kubelet/config.yaml + +Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. +All configuration is passed in as arguments at container run time. + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--streaming-connection-idle-timeout' is not equal to '0' OR '--streaming-connection-idle-timeout' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--protect-kernel-defaults=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--protect-kernel-defaults' is equal to 'true' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +Clusters provisioned by RKE set the --hostname-override to avoid any hostname configuration errors + +### 4.2.9 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--event-qps' is equal to '0' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--rotate-certificates' is present OR '--rotate-certificates' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +Clusters provisioned by RKE handles certificate rotation directly through RKE. + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4429 4031 3 Sep11 ? 00:38:25 kubelet --read-only-port=0 --event-qps=0 --root-dir=/var/lib/kubelet --pod-infra-container-image=rancher/mirrored-pause:3.7 --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100-key.pem --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --cloud-provider= --address=0.0.0.0 --protect-kernel-defaults=true --hostname-override=ip-172-31-7-100 --resolv-conf=/etc/resolv.conf --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-7-100.pem --make-iptables-util-chains=true --feature-gates=RotateKubeletServerCertificate=true --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --container-runtime=remote --v=2 --anonymous-auth=false --authentication-token-webhook=true --fail-swap-on=false --cgroups-per-qos=True --authorization-mode=Webhook --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Automated) + + +**Result:** pass + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +**Audit Script:** `check_for_default_sa.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) +if [[ ${count_sa} -gt 0 ]]; then + echo "false" + exit +fi + +for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") +do + for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[]?.kind=="ServiceAccount" and .subjects[]?.name=="default") or (.subjects[]?.kind=="Group" and .subjects[]?.name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') + do + read kind name <<<$(IFS=","; echo $result) + resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[]? != "podsecuritypolicies")' | wc -l) + if [[ ${resource_count} -gt 0 ]]; then + echo "false" + exit + fi + done +done + + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_default_sa.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): roles.rbac.authorization.k8s.io "default-psp-role" is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot get resource "roles" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" true +``` + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=1 +``` + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=1 +``` + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=1 +``` + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=1 +``` + +### 5.2.7 Minimize the admission of root containers (Manual) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +**Audit Script:** `check_for_network_policies.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +for namespace in $(kubectl get namespaces --all-namespaces -o json | jq -r '.items[].metadata.name'); do + policy_count=$(kubectl get networkpolicy -n ${namespace} -o json | jq '.items | length') + if [[ ${policy_count} -eq 0 ]]; then + echo "false" + exit + fi +done + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_network_policies.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Automated) + + +**Result:** pass + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + +**Audit Script:** `check_for_default_ns.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count=$(kubectl get all -n default -o json | jq .items[] | jq -r 'select((.metadata.name!="kubernetes"))' | jq .metadata.name | wc -l) +if [[ ${count} -gt 0 ]]; then + echo "false" + exit +fi + +echo "true" + + +``` + +**Audit Execution:** + +```bash +./check_for_default_ns.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md new file mode 100644 index 00000000000..9fe9ca2045f --- /dev/null +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md @@ -0,0 +1,2863 @@ +--- +title: RKE Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25/v1.26/v1.27 +--- + + + + + +This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25/v1.26/v1.27 | + +This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +Rancher and RKE install Kubernetes services via Docker containers. Configuration is defined by arguments passed to the container at the time of initialization, not via configuration files. + +Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-apiserver.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-apiserver.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-controller-manager.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-controller-manager.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/manifests/kube-scheduler.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /etc/kubernetes/manifests/etcd.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /etc/kubernetes/manifests/etcd.yaml +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. +All configuration is passed in as arguments at container run time. + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +**Audit:** + +```bash +ps -ef | grep kubelet | grep -- --cni-conf-dir | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a +``` + +**Expected Result**: + +```console +'permissions' is present +``` + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +**Audit:** + +```bash +ps -ef | grep kubelet | grep -- --cni-conf-dir | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit:** + +```bash +stat -c %a /node/var/lib/etcd +``` + +**Expected Result**: + +```console +'700' is equal to '700' +``` + +**Returned Value**: + +```console +700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +**Audit:** + +```bash +stat -c %U:%G /node/var/lib/etcd +``` + +**Expected Result**: + +```console +'etcd:etcd' is present +``` + +**Returned Value**: + +```console +etcd:etcd +``` + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/admin.conf +Not Applicable - Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf +Not Applicable - Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 scheduler +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root scheduler +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. +All configuration is passed in as arguments at container run time. + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 controllermanager +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root controllermanager +Not Applicable - Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. +All configuration is passed in as arguments at container run time. + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /etc/kubernetes/pki/ + +**Audit Script:** `check_files_owner_in_dir.sh` + +```bash +#!/usr/bin/env bash + +# This script is used to ensure the owner is set to root:root for +# the given directory and all the files in it +# +# inputs: +# $1 = /full/path/to/directory +# +# outputs: +# true/false + +INPUT_DIR=$1 + +if [[ "${INPUT_DIR}" == "" ]]; then + echo "false" + exit +fi + +if [[ $(stat -c %U:%G ${INPUT_DIR}) != "root:root" ]]; then + echo "false" + exit +fi + +statInfoLines=$(stat -c "%n %U:%G" ${INPUT_DIR}/*) +while read -r statInfoLine; do + f=$(echo ${statInfoLine} | cut -d' ' -f1) + p=$(echo ${statInfoLine} | cut -d' ' -f2) + + if [[ $(basename "$f" .pem) == "kube-etcd-"* ]]; then + if [[ "$p" != "root:root" && "$p" != "etcd:etcd" ]]; then + echo "false" + exit + fi + else + if [[ "$p" != "root:root" ]]; then + echo "false" + exit + fi + fi +done <<< "${statInfoLines}" + + +echo "true" +exit + +``` + +**Audit Execution:** + +```bash +./check_files_owner_in_dir.sh /node/etc/kubernetes/ssl +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +find /node/etc/kubernetes/ssl/ -name '*.pem' ! -name '*key.pem' -exec chmod -R 600 {} + + +**Audit:** + +```bash +find /node/etc/kubernetes/ssl/ -name '*.pem' ! -name '*key.pem' | xargs stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=644 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +find /node/etc/kubernetes/ssl/ -name '*key.pem' -exec chmod -R 600 {} + + +**Audit:** + +```bash +find /node/etc/kubernetes/ssl/ -name '*key.pem' | xargs stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.4 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.5 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= +When generating serving certificates, functionality could break in conjunction with hostname overrides which are required for certain cloud providers. + +### 1.2.6 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.7 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.9 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.10 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.12 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.13 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.14 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.15 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.16 Ensure that the --secure-port argument is not set to 0 - NoteThis recommendation is obsolete and will be deleted per the consensus process (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.17 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.18 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.19 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.20 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.21 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxsize' is greater or equal to 100 +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.22 Ensure that the --request-timeout argument is set as appropriate (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +and set the below parameter as appropriate and if needed. +For example, --request-timeout=300s + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +### 1.2.23 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.24 Ensure that the --service-account-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.25 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.26 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.27 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.28 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.29 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 1.2.30 Ensure that encryption providers are appropriately configured (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit:** + +```bash +ENCRYPTION_PROVIDER_CONFIG=$(ps -ef | grep kube-apiserver | grep -- --encryption-provider-config | sed 's%.*encryption-provider-config[= ]\([^ ]*\).*%\1%') if test -e $ENCRYPTION_PROVIDER_CONFIG; then grep -A1 'providers:' $ENCRYPTION_PROVIDER_CONFIG | tail -n1 | grep -o "[A-Za-z]*" | sed 's/^/provider=/'; fi +``` + +**Expected Result**: + +```console +'provider' is present +``` + +### 1.2.31 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true +Cluster provisioned by RKE handles certificate rotation directly through RKE. + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 4184 4163 1 Sep11 ? 00:20:06 kube-controller-manager --configure-cloud-routes=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --service-cluster-ip-range=10.43.0.0/16 --cluster-cidr=10.42.0.0/16 --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --node-monitor-grace-period=40s --v=2 --profiling=false --cloud-provider= --allow-untagged-cloud=true --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --use-service-account-credentials=true +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 4339 4318 0 Sep11 ? 00:03:28 kube-scheduler --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --profiling=false --v=2 --leader-elect=true +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is present OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 4339 4318 0 Sep11 ? 00:03:28 kube-scheduler --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --profiling=false --v=2 --leader-elect=true +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--cert-file' is present AND '--key-file' is present +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 2 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and set the below parameter. +--client-cert-auth="true" + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 1 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-4-224 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem ETCDCTL_ENDPOINTS=https://127.0.0.1:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--peer-cert-file' is present AND '--peer-key-file' is present +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 2 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and set the below parameter. +--peer-client-cert-auth=true + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--peer-client-cert-auth' is equal to 'true' +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 1 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-4-224 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem ETCDCTL_ENDPOINTS=https://127.0.0.1:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'--trusted-ca-file' is present +``` + +**Returned Value**: + +```console +etcd 3847 3824 2 Sep11 ? 00:29:36 /usr/local/bin/etcd --peer-client-cert-auth=true --initial-advertise-peer-urls=https://172.31.4.224:2380 --initial-cluster=etcd-ip-172-31-4-224=https://172.31.4.224:2380 --initial-cluster-state=new --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --client-cert-auth=true --heartbeat-interval=500 --listen-client-urls=https://0.0.0.0:2379 --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --listen-peer-urls=https://0.0.0.0:2380 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-4-224-key.pem --data-dir=/var/lib/rancher/etcd/ --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-4-224 --advertise-client-urls=https://172.31.4.224:2379 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --election-timeout=5000 root 4018 3998 5 Sep11 ? 01:03:21 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml root 1034677 1034607 1 16:16 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.7-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +### 3.1.2 Service account token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of service account tokens. + +### 3.1.3 Bootstrap token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of bootstrap tokens. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Automated) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-policy-file' is present +``` + +**Returned Value**: + +```console +root 4018 3998 5 Sep11 ? 01:03:22 kube-apiserver --advertise-address=172.31.4.224 --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxbackup=10 --requestheader-allowed-names=kube-apiserver-proxy-client --service-cluster-ip-range=10.43.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --requestheader-extra-headers-prefix=X-Remote-Extra- --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --storage-backend=etcd3 --anonymous-auth=false --bind-address=0.0.0.0 --cloud-provider= --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --service-node-port-range=30000-32767 --profiling=false --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --runtime-config=authorization.k8s.io/v1beta1=true --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --service-account-lookup=true --etcd-servers=https://172.31.4.224:2379 --api-audiences=unknown --requestheader-group-headers=X-Remote-Group --service-account-issuer=rke --audit-log-maxsize=100 --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --secure-port=6443 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --authorization-mode=Node,RBAC --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --audit-log-maxage=30 --audit-log-format=json --etcd-prefix=/registry --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --authentication-token-webhook-cache-ttl=5s --admission-control-config-file=/etc/kubernetes/admission.yaml --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --requestheader-username-headers=X-Remote-User --allow-privileged=true --audit-policy-file=/etc/kubernetes/audit-policy.yaml +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable - Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. +All configuration is passed in as arguments at container run time. + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable - Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. + All configuration is passed in as arguments at container run time. + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit:** + +```bash +stat -c permissions=%a /node/etc/kubernetes/ssl/kube-ca.pem +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit:** + +```bash +stat -c %U:%G /node/etc/kubernetes/ssl/kube-ca.pem +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/kubelet/config.yaml +Not Applicable - Clusters provisioned by RKE do not require or maintain a configuration file for the kubelet. +All configuration is passed in as arguments at container run time. + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/kubelet/config.yaml +Not Applicable - Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. +All configuration is passed in as arguments at container run time. + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--streaming-connection-idle-timeout' is not equal to '0' OR '--streaming-connection-idle-timeout' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.6 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.7 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable - Clusters provisioned by RKE set the --hostname-override to avoid any hostname configuration errors + +### 4.2.8 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--event-qps' is greater or equal to 0 OR '--event-qps' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.9 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.10 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--rotate-certificates' is present OR '--rotate-certificates' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.11 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable - Clusters provisioned by RKE handles certificate rotation directly through RKE. + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +### 4.2.12 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--tls-cipher-suites' contains valid elements from 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +### 4.2.13 Ensure that a limit is set on pod PIDs (Manual) + + +**Result:** warn + +**Remediation:** +Decide on an appropriate level for this parameter and set it, +either via the --pod-max-pids command line parameter or the PodPidsLimit configuration file setting. + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' +``` + +**Expected Result**: + +```console +'--pod-max-pids' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 4903 4499 3 Sep11 ? 00:36:52 kubelet --v=2 --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224-key.pem --event-qps=0 --address=0.0.0.0 --cgroups-per-qos=True --pod-infra-container-image=rancher/mirrored-pause:3.7 --root-dir=/var/lib/kubelet --container-runtime=remote --make-iptables-util-chains=true --authorization-mode=Webhook --resolv-conf=/etc/resolv.conf --cloud-provider= --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --authentication-token-webhook=true --anonymous-auth=false --read-only-port=0 --volume-plugin-dir=/var/lib/kubelet/volumeplugins --protect-kernel-defaults=true --feature-gates=RotateKubeletServerCertificate=true --cluster-dns=10.43.0.10 --fail-swap-on=false --hostname-override=ip-172-31-4-224 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --cluster-domain=cluster.local --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-4-224.pem --streaming-connection-idle-timeout=30m --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Manual) + + +**Result:** pass + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +**Audit Script:** `check_for_default_sa.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) +if [[ ${count_sa} -gt 0 ]]; then + echo "false" + exit +fi + +for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") +do + for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[]?.kind=="ServiceAccount" and .subjects[]?.name=="default") or (.subjects[]?.kind=="Group" and .subjects[]?.name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') + do + read kind name <<<$(IFS=","; echo $result) + resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[]? != "podsecuritypolicies")' | wc -l) + if [[ ${resource_count} -gt 0 ]]; then + echo "false" + exit + fi + done +done + + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_default_sa.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +### 5.1.9 Minimize access to create persistent volumes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to PersistentVolume objects in the cluster. + +### 5.1.10 Minimize access to the proxy sub-resource of nodes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the proxy sub-resource of node objects. + +### 5.1.11 Minimize access to the approval sub-resource of certificatesigningrequests objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the approval sub-resource of certificatesigningrequest objects. + +### 5.1.12 Minimize access to webhook configuration objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the validatingwebhookconfigurations or mutatingwebhookconfigurations objects + +### 5.1.13 Minimize access to the service account token creation (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the token sub-resource of serviceaccount objects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +### 5.2.7 Minimize the admission of root containers (Manual) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md deleted file mode 100644 index 084568cc402..00000000000 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md +++ /dev/null @@ -1,3085 +0,0 @@ ---- -title: RKE Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25 ---- - -This document is a companion to the [RKE Hardening Guide](../../../../pages-for-subheaders/rke1-hardening-guide.md), which provides prescriptive guidance on how to harden RKE clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25 | - -This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -Rancher and RKE install Kubernetes services via Docker containers. Configuration is defined by arguments passed to the container at the time of initialization, not via configuration files. - -Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Control Plane Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. -All configuration is passed in as arguments at container run time. - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for kube-apiserver. -All configuration is passed in as arguments at container run time. - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. -All configuration is passed in as arguments at container run time. - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for etcd. -All configuration is passed in as arguments at container run time. - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 permissions=600 -``` - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root -``` - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit:** - -```bash -stat -c %a /node/var/lib/etcd -``` - -**Expected Result**: - -```console -'700' is equal to '700' -``` - -**Returned Value**: - -```console -700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** Not Applicable - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE does not store the kubernetes default kubeconfig credentials file on the nodes. - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for scheduler. -All configuration is passed in as arguments at container run time. - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn't require or maintain a configuration file for controller-manager. -All configuration is passed in as arguments at container run time. - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the master node. -For example, -chown -R root:root /etc/kubernetes/pki/ - -**Audit Script:** `check_files_owner_in_dir.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the owner is set to root:root for -# the given directory and all the files in it -# -# inputs: -# $1 = /full/path/to/directory -# -# outputs: -# true/false - -INPUT_DIR=$1 - -if [[ "${INPUT_DIR}" == "" ]]; then - echo "false" - exit -fi - -if [[ $(stat -c %U:%G ${INPUT_DIR}) != "root:root" ]]; then - echo "false" - exit -fi - -statInfoLines=$(stat -c "%n %U:%G" ${INPUT_DIR}/*) -while read -r statInfoLine; do - f=$(echo ${statInfoLine} | cut -d' ' -f1) - p=$(echo ${statInfoLine} | cut -d' ' -f2) - - if [[ $(basename "$f" .pem) == "kube-etcd-"* ]]; then - if [[ "$p" != "root:root" && "$p" != "etcd:etcd" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "root:root" ]]; then - echo "false" - exit - fi - fi -done <<< "${statInfoLines}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_owner_in_dir.sh /node/etc/kubernetes/ssl -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the master node. -For example, -chmod -R 644 /etc/kubernetes/pki/*.crt - -**Audit Script:** `check_files_permissions.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the file permissions are set to 644 or -# more restrictive for all files in a given directory or a wildcard -# selection of files -# -# inputs: -# $1 = /full/path/to/directory or /path/to/fileswithpattern -# ex: !(*key).pem -# -# $2 (optional) = permission (ex: 600) -# -# outputs: -# true/false - -# Turn on "extended glob" for use of '!' in wildcard -shopt -s extglob - -# Turn off history to avoid surprises when using '!' -set -H - -USER_INPUT=$1 - -if [[ "${USER_INPUT}" == "" ]]; then - echo "false" - exit -fi - - -if [[ -d ${USER_INPUT} ]]; then - PATTERN="${USER_INPUT}/*" -else - PATTERN="${USER_INPUT}" -fi - -PERMISSION="" -if [[ "$2" != "" ]]; then - PERMISSION=$2 -fi - -FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) - -while read -r fileInfo; do - p=$(echo ${fileInfo} | cut -d' ' -f2) - - if [[ "${PERMISSION}" != "" ]]; then - if [[ "$p" != "${PERMISSION}" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then - echo "false" - exit - fi - fi -done <<< "${FILES_PERMISSIONS}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_permissions.sh '/node/etc/kubernetes/ssl/!(*key).pem' -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /etc/kubernetes/ssl/*key.pem - -**Audit Script:** `check_files_permissions.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to ensure the file permissions are set to 644 or -# more restrictive for all files in a given directory or a wildcard -# selection of files -# -# inputs: -# $1 = /full/path/to/directory or /path/to/fileswithpattern -# ex: !(*key).pem -# -# $2 (optional) = permission (ex: 600) -# -# outputs: -# true/false - -# Turn on "extended glob" for use of '!' in wildcard -shopt -s extglob - -# Turn off history to avoid surprises when using '!' -set -H - -USER_INPUT=$1 - -if [[ "${USER_INPUT}" == "" ]]; then - echo "false" - exit -fi - - -if [[ -d ${USER_INPUT} ]]; then - PATTERN="${USER_INPUT}/*" -else - PATTERN="${USER_INPUT}" -fi - -PERMISSION="" -if [[ "$2" != "" ]]; then - PERMISSION=$2 -fi - -FILES_PERMISSIONS=$(stat -c %n\ %a ${PATTERN}) - -while read -r fileInfo; do - p=$(echo ${fileInfo} | cut -d' ' -f2) - - if [[ "${PERMISSION}" != "" ]]; then - if [[ "$p" != "${PERMISSION}" ]]; then - echo "false" - exit - fi - else - if [[ "$p" != "644" && "$p" != "640" && "$p" != "600" ]]; then - echo "false" - exit - fi - fi -done <<< "${FILES_PERMISSIONS}" - - -echo "true" -exit - -``` - -**Audit Execution:** - -```bash -./check_files_permissions.sh '/node/etc/kubernetes/ssl/*key.pem' -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -true -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-https' is present OR '--kubelet-https' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/etc/kubernetes/manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is equal to 'true' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 1.2.31 Ensure that encryption providers are appropriately configured (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit Script:** `check_encryption_provider_config.sh` - -```bash -#!/usr/bin/env bash - -# This script is used to check the encrption provider config is set to aesbc -# -# outputs: -# true/false - -# TODO: Figure out the file location from the kube-apiserver commandline args -ENCRYPTION_CONFIG_FILE="/node/etc/kubernetes/ssl/encryption.yaml" - -if [[ ! -f "${ENCRYPTION_CONFIG_FILE}" ]]; then - echo "false" - exit -fi - -for provider in "$@" -do - if grep "$provider" "${ENCRYPTION_CONFIG_FILE}"; then - echo "true" - exit - fi -done - -echo "false" -exit - -``` - -**Audit Execution:** - -```bash -./check_encryption_provider_config.sh aescbc -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -- aescbc: true -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384' -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--terminated-pod-gc-threshold' is present -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -Cluster provisioned by RKE handles certificate rotation directly through RKE. - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is present OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 5506 5484 2 22:01 ? 00:00:05 kube-controller-manager --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --pod-eviction-timeout=5m0s --terminated-pod-gc-threshold=1000 --v=2 --allocate-node-cidrs=true --enable-hostpath-provisioner=false --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --root-ca-file=/etc/kubernetes/ssl/kube-ca.pem --service-account-private-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --allow-untagged-cloud=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --cluster-cidr=10.42.0.0/16 --node-monitor-grace-period=40s --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-controller-manager.yaml --cloud-provider= --service-cluster-ip-range=10.43.0.0/16 --profiling=false --configure-cloud-routes=false --leader-elect=true --feature-gates=RotateKubeletServerCertificate=true --use-service-account-credentials=true -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 5671 5649 0 22:01 ? 00:00:01 kube-scheduler --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /etc/kubernetes/manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is present OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 5671 5649 0 22:01 ? 00:00:01 kube-scheduler --authorization-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml --leader-elect=true --profiling=false --v=2 --authentication-kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-scheduler.yaml -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--cert-file' is present AND '--key-file' is present -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 5 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and set the below parameter. ---client-cert-auth="true" - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 4 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-51 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem ETCDCTL_ENDPOINTS=https://172.31.31.51:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--peer-cert-file' is present AND '--peer-key-file' is present -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 2 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and set the below parameter. ---peer-client-cert-auth=true - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--peer-client-cert-auth' is equal to 'true' -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 3 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-51 ETCDCTL_API=3 ETCDCTL_CACERT=/etc/kubernetes/ssl/kube-ca.pem ETCDCTL_CERT=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem ETCDCTL_KEY=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem ETCDCTL_ENDPOINTS=https://172.31.31.51:2379 ETCD_UNSUPPORTED_ARCH=x86_64 HOME=/ -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'--trusted-ca-file' is present -``` - -**Returned Value**: - -```console -etcd 5188 5167 3 22:01 ? 00:00:08 /usr/local/bin/etcd --client-cert-auth=true --data-dir=/var/lib/rancher/etcd/ --initial-advertise-peer-urls=https://172.31.31.51:2380 --listen-peer-urls=https://172.31.31.51:2380 --initial-cluster=etcd-ip-172-31-31-51=https://172.31.31.51:2380 --initial-cluster-state=new --peer-trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --peer-cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --peer-client-cert-auth=true --listen-client-urls=https://172.31.31.51:2379 --cert-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51.pem --advertise-client-urls=https://172.31.31.51:2379 --initial-cluster-token=etcd-cluster-1 --name=etcd-ip-172-31-31-51 --trusted-ca-file=/etc/kubernetes/ssl/kube-ca.pem --key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --peer-key-file=/etc/kubernetes/ssl/kube-etcd-172-31-31-51-key.pem --election-timeout=5000 --cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --heartbeat-interval=500 root 5354 5332 14 22:01 ? 00:00:33 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem root 19036 18926 2 22:05 ? 00:00:00 kube-bench run --targets etcd --scored --nosummary --noremediations --v=0 --config-dir=/etc/kube-bench/cfg --benchmark rke-cis-1.23-hardened --json --log_dir /tmp/sonobuoy/logs --outputfile /tmp/sonobuoy/etcd.json -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Automated) - - -**Result:** pass - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-policy-file' is present -``` - -**Returned Value**: - -```console -root 5354 5332 14 22:01 ? 00:00:34 kube-apiserver --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota,NodeRestriction,Priority,TaintNodesByCondition,PersistentVolumeClaimResize,EventRateLimit --runtime-config=authorization.k8s.io/v1beta1=true --audit-log-path=/var/log/kube-audit/audit-log.json --audit-log-maxsize=100 --etcd-certfile=/etc/kubernetes/ssl/kube-node.pem --requestheader-group-headers=X-Remote-Group --storage-backend=etcd3 --proxy-client-cert-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client.pem --authentication-token-webhook-cache-ttl=5s --etcd-prefix=/registry --service-node-port-range=30000-32767 --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem --authentication-token-webhook-config-file=/etc/kubernetes/kube-api-authn-webhook.yaml --profiling=false --audit-log-format=json --admission-control-config-file=/etc/kubernetes/admission.yaml --etcd-cafile=/etc/kubernetes/ssl/kube-ca.pem --encryption-provider-config=/etc/kubernetes/ssl/encryption.yaml --allow-privileged=true --requestheader-username-headers=X-Remote-User --anonymous-auth=false --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --api-audiences=unknown --etcd-servers=https://172.31.31.51:2379 --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem --advertise-address=172.31.31.51 --audit-log-maxage=30 --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --kubelet-certificate-authority=/etc/kubernetes/ssl/kube-ca.pem --requestheader-extra-headers-prefix=X-Remote-Extra- --bind-address=0.0.0.0 --service-account-lookup=true --authorization-mode=Node,RBAC --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --requestheader-allowed-names=kube-apiserver-proxy-client --service-account-issuer=rke --service-account-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --secure-port=6443 --audit-log-maxbackup=10 --audit-policy-file=/etc/kubernetes/audit-policy.yaml --cloud-provider= --etcd-keyfile=/etc/kubernetes/ssl/kube-node-key.pem --service-cluster-ip-range=10.43.0.0/16 --service-account-signing-key-file=/etc/kubernetes/ssl/kube-service-account-token-key.pem --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. -All configuration is passed in as arguments at container run time. - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Cluster provisioned by RKE doesn’t require or maintain a configuration file for the kubelet service. -All configuration is passed in as arguments at container run time. - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive OR '/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml' is not present -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; then stat -c %U:%G /etc/kubernetes/ssl/kubecfg-kube-proxy.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present OR '/etc/kubernetes/ssl/kubecfg-kube-proxy.yaml' is not present -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /etc/kubernetes/ssl/kubecfg-kube-node.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c permissions=%a /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/kubernetes/ssl/kubecfg-kube-node.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; then stat -c %U:%G /node/etc/kubernetes/ssl/kubecfg-kube-node.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit:** - -```bash -stat -c permissions=%a /node/etc/kubernetes/ssl/kube-ca.pem -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit:** - -```bash -stat -c %U:%G /node/etc/kubernetes/ssl/kube-ca.pem -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /var/lib/kubelet/config.yaml - -Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. -All configuration is passed in as arguments at container run time. - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /var/lib/kubelet/config.yaml - -Clusters provisioned by RKE doesn’t require or maintain a configuration file for the kubelet. -All configuration is passed in as arguments at container run time. - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--streaming-connection-idle-timeout' is not equal to '0' OR '--streaming-connection-idle-timeout' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--make-iptables-util-chains' is equal to 'true' OR '--make-iptables-util-chains' is not present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -Clusters provisioned by RKE set the --hostname-override to avoid any hostname configuration errors - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--event-qps' is equal to '0' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -Clusters provisioned by RKE handles certificate rotation directly through RKE. - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/sh -c 'if test -e /var/lib/kubelet/config.yaml; then /bin/cat /var/lib/kubelet/config.yaml; fi' -``` - -**Expected Result**: - -```console -'--tls-cipher-suites' contains valid elements from 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 6239 5834 2 22:02 ? 00:00:04 kubelet --authorization-mode=Webhook --v=2 --root-dir=/var/lib/kubelet --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --tls-private-key-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51-key.pem --cgroups-per-qos=True --streaming-connection-idle-timeout=30m --tls-cert-file=/etc/kubernetes/ssl/kube-kubelet-172-31-31-51.pem --kubeconfig=/etc/kubernetes/ssl/kubecfg-kube-node.yaml --address=0.0.0.0 --cluster-domain=cluster.local --fail-swap-on=false --make-iptables-util-chains=true --volume-plugin-dir=/var/lib/kubelet/volumeplugins --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --pod-infra-container-image=rancher/mirrored-pause:3.6 --node-ip=172.31.31.51 --resolv-conf=/etc/resolv.conf --event-qps=0 --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 --protect-kernel-defaults=true --cluster-dns=10.43.0.10 --container-runtime=remote --authentication-token-webhook=true --anonymous-auth=false --feature-gates=RotateKubeletServerCertificate=true --cloud-provider= --read-only-port=0 --hostname-override=ip-172-31-31-51 --cgroup-driver=cgroupfs --resolv-conf=/run/systemd/resolve/resolv.conf -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Automated) - - -**Result:** pass - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -**Audit Script:** `check_for_default_sa.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) -if [[ ${count_sa} -gt 0 ]]; then - echo "false" - exit -fi - -for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") -do - for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[].kind=="ServiceAccount" and .subjects[].name=="default") or (.subjects[].kind=="Group" and .subjects[].name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') - do - read kind name <<<$(IFS=","; echo $result) - resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[] != "podsecuritypolicies")' | wc -l) - if [[ ${resource_count} -gt 0 ]]; then - echo "false" - exit - fi - done -done - - -echo "true" -``` - -**Audit Execution:** - -```bash -./check_for_default_sa.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): serviceaccounts is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "serviceaccounts" in API group "" at the cluster scope Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-fleet-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-impersonation-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cis-operator-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "default" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "ingress-nginx" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-node-lease" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-public" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "local" true -``` - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** fail - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console -error: the server doesn't have a resource type "psp" --count=0 -``` - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** warn - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) - - -**Result:** warn - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -**Audit Script:** `check_for_network_policies.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -for namespace in $(kubectl get namespaces --all-namespaces -o json | jq -r '.items[].metadata.name'); do - policy_count=$(kubectl get networkpolicy -n ${namespace} -o json | jq '.items | length') - if [[ ${policy_count} -eq 0 ]]; then - echo "false" - exit - fi -done - -echo "true" - -``` - -**Audit Execution:** - -```bash -./check_for_network_policies.sh -``` - -**Expected Result**: - -```console -'true' is present -``` - -**Returned Value**: - -```console -true -``` - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Automated) - - -**Result:** pass - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. - -**Audit Script:** `check_for_default_ns.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count=$(kubectl get all -n default -o json | jq .items[] | jq -r 'select((.metadata.name!="kubernetes"))' | jq .metadata.name | wc -l) -if [[ ${count} -gt 0 ]]; then - echo "false" - exit -fi - -echo "true" - - -``` - -**Audit Execution:** - -```bash -./check_for_default_ns.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): replicationcontrollers is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "replicationcontrollers" in API group "" in the namespace "default" Error from server (Forbidden): services is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "services" in API group "" in the namespace "default" Error from server (Forbidden): daemonsets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "daemonsets" in API group "apps" in the namespace "default" Error from server (Forbidden): deployments.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "deployments" in API group "apps" in the namespace "default" Error from server (Forbidden): replicasets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "replicasets" in API group "apps" in the namespace "default" Error from server (Forbidden): statefulsets.apps is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "statefulsets" in API group "apps" in the namespace "default" Error from server (Forbidden): horizontalpodautoscalers.autoscaling is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "horizontalpodautoscalers" in API group "autoscaling" in the namespace "default" Error from server (Forbidden): cronjobs.batch is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "cronjobs" in API group "batch" in the namespace "default" Error from server (Forbidden): jobs.batch is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "jobs" in API group "batch" in the namespace "default" true -``` - diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md index 83cac7d6e59..3099612cacb 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23.md @@ -2,6 +2,10 @@ title: RKE2 Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.23 --- + + + + This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md deleted file mode 100644 index ffb7755d7ad..00000000000 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24.md +++ /dev/null @@ -1,3196 +0,0 @@ ---- -title: RKE2 Self-Assessment Guide - CIS Benchmark v1.23 - K8s v1.24 ---- - -This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. - -This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: - -| Rancher Version | CIS Benchmark Version | Kubernetes Version | -|-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.23 | Kubernetes v1.24 | - -This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE2 install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. - -This document is for Rancher operators, security teams, auditors and decision makers. - -For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.23. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). - -## Testing Methodology - -RKE2 launches control plane components as static pods, managed by the kubelet, and uses containerd as the container runtime. Configuration is defined by arguments passed to the container at the time of initialization or via configuration file. - -Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE2 nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. - -:::note - -This guide only covers `automated` (previously called `scored`) tests. - -::: - -### Controls - -## 1.1 Master Node Configuration Files -### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the -control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %a /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -644 -``` - -### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' -``` - -**Expected Result**: - -```console -'permissions' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.9 Ensure that the Container Network Interface file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 644 - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 permissions=644 -``` - -### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root - -**Audit:** - -```bash -ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root root:root -``` - -### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). For example, -chmod 700 /var/lib/etcd - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/db/etcd -``` - -**Expected Result**: - -```console -permissions has permissions 700, expected 700 or more restrictive -``` - -**Returned Value**: - -```console -permissions=700 -``` - -### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) - - -**Result:** pass - -**Remediation:** -On the etcd server node, get the etcd data directory, passed as an argument --data-dir, -from the command 'ps -ef | grep etcd'. -Run the below command (based on the etcd data directory found above). -For example, chown etcd:etcd /var/lib/etcd - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/db/etcd -``` - -**Expected Result**: - -```console -'etcd:etcd' is present -``` - -**Returned Value**: - -```console -etcd:etcd -``` - -### 1.1.13 Ensure that the admin.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chmod 600 /etc/kubernetes/admin.conf - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/admin.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, chown root:root /etc/kubernetes/admin.conf - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/admin.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.15 Ensure that the scheduler.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 scheduler - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root scheduler - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod 644 controllermanager - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/cred/controller.kubeconfig -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown root:root /var/lib/rancher/rke2/server/cred/controller.kubeconfig - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/cred/controller.kubeconfig -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chown -R root:root /var/lib/rancher/rke2/server/tls/ - -**Audit:** - -```bash -stat -c %U:%G /var/lib/rancher/rke2/server/tls -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 644 /var/lib/rancher/rke2/server/tls/*.crt - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.crt -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 -``` - -### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the control plane node. -For example, -chmod -R 600 /var/lib/rancher/rke2/server/tls/*.key - -**Audit:** - -```bash -stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.key -``` - -**Expected Result**: - -```console -'permissions' is equal to '600' -``` - -**Returned Value**: - -```console -permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 -``` - -## 1.2 API Server -### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---anonymous-auth=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and configure alternate mechanisms for authentication. Then, -edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the --token-auth-file= parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--token-auth-file' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the `DenyServiceExternalIPs` -from enabled admission plugins. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and remove the --kubelet-https parameter. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-https' is present OR '--kubelet-https' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the -apiserver and kubelets. Then, edit API server pod specification file -/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the -kubelet client certificate and key parameters as below. ---kubelet-client-certificate= ---kubelet-client-key= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and setup the TLS connection between -the apiserver and kubelets. Then, edit the API server pod specification file -/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the ---kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. ---kubelet-certificate-authority= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--kubelet-certificate-authority' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. -One such example could be as below. ---authorization-mode=RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes Node. ---authorization-mode=Node,RBAC - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'Node' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, -for example `--authorization-mode=Node,RBAC`. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--authorization-mode' has 'RBAC' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and set the desired limits in a configuration file. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -and set the below parameters. ---enable-admission-plugins=...,EventRateLimit,... ---admission-control-config-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'EventRateLimit' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a -value that does not include AlwaysAdmit. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) - - -**Result:** warn - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -AlwaysPullImages. ---enable-admission-plugins=...,AlwaysPullImages,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'AlwaysPullImages' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to include -SecurityContextDeny, unless PodSecurityPolicy is already in place. ---enable-admission-plugins=...,SecurityContextDeny,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create ServiceAccount objects as per your environment. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and ensure that the --disable-admission-plugins parameter is set to a -value that does not include ServiceAccount. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --disable-admission-plugins parameter to -ensure it does not include NamespaceLifecycle. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --enable-admission-plugins parameter to a -value that includes NodeRestriction. ---enable-admission-plugins=...,NodeRestriction,... - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--enable-admission-plugins' has 'NodeRestriction' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and either remove the --secure-port parameter or -set it to a different (non-zero) desired port. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--secure-port' is greater than 0 OR '--secure-port' is not present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.18 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-path parameter to a suitable path and -file where you would like audit logs to be written, for example, ---audit-log-path=/var/log/apiserver/audit.log - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-path' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxage parameter to 30 -or as an appropriate number of days, for example, ---audit-log-maxage=30 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxage' is greater or equal to 30 -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:34 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate -value. For example, ---audit-log-maxbackup=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxbackup' is greater or equal to 10 -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. -For example, to set it as 100 MB, --audit-log-maxsize=100 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--audit-log-maxsize' is greater or equal to 100 -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---service-account-lookup=true -Alternatively, you can delete the --service-account-lookup parameter from this file so -that the default takes effect. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-lookup' is not present OR '--service-account-lookup' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --service-account-key-file parameter -to the public key file for service accounts. For example, ---service-account-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-key-file' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate and key file parameters. ---etcd-certfile= ---etcd-keyfile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-certfile' is present AND '--etcd-keyfile' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the TLS certificate and private key file parameters. ---tls-cert-file= ---tls-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection on the apiserver. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the client certificate authority file. ---client-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the etcd certificate authority file parameter. ---etcd-cafile= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--etcd-cafile' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml -on the control plane node and set the --encryption-provider-config parameter to the path of that file. -For example, --encryption-provider-config= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep -``` - -**Expected Result**: - -```console -'--encryption-provider-config' is present -``` - -**Returned Value**: - -```console -root 3484 3419 16 23:45 ? 00:01:35 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml -on the control plane node and set the below parameter. ---tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, -TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, -TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, -TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, -TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, -TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 - -### 1.2.33 Ensure that encryption providers are appropriately configured (Automated) - - -**Result:** pass - -**Remediation:** -Follow the Kubernetes documentation and configure a EncryptionConfig file. -In this file, choose aescbc, kms or secretbox as the encryption provider. - -**Audit:** - -```bash -/bin/sh -c 'if grep aescbc /var/lib/rancher/rke2/server/cred/encryption-config.json; then echo 0; fi' -``` - -**Expected Result**: - -```console -'0' is present -``` - -**Returned Value**: - -```console -{"kind":"EncryptionConfiguration","apiVersion":"apiserver.config.k8s.io/v1","resources":[{"resources":["secrets"],"providers":[{"aescbc":{"keys":[{"name":"aescbckey","secret":"LdLeqCPN/HfmgnUBXVPkDtUfeOPHwcQzDiLYG3nzFI4="}]}},{"identity":{}}]}]} 0 -``` - -## 1.3 Controller Manager -### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, -for example, --terminated-pod-gc-threshold=10 - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--terminated-pod-gc-threshold' is present -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.2 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node to set the below parameter. ---use-service-account-credentials=true - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--use-service-account-credentials' is not equal to 'false' -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --service-account-private-key-file parameter -to the private key file for service accounts. ---service-account-private-key-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--service-account-private-key-file' is present -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. ---root-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--root-ca-file' is present -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. ---feature-gates=RotateKubeletServerCertificate=true - -### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-controller-manager | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 3645 3538 1 23:45 ? 00:00:10 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true -``` - -## 1.4 Scheduler -### 1.4.1 Ensure that the --profiling argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml file -on the control plane node and set the below parameter. ---profiling=false - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--profiling' is equal to 'false' -``` - -**Returned Value**: - -```console -root 3652 3523 0 23:45 ? 00:00:03 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 -``` - -### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) - - -**Result:** pass - -**Remediation:** -Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml -on the control plane node and ensure the correct value for the --bind-address parameter - -**Audit:** - -```bash -/bin/ps -ef | grep kube-scheduler | grep -v grep -``` - -**Expected Result**: - -```console -'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present -``` - -**Returned Value**: - -```console -root 3652 3523 0 23:45 ? 00:00:03 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 -``` - -## 2 Etcd Node Configuration -### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Follow the etcd service documentation and configure TLS encryption. -Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml -on the master node and set the below parameters. ---cert-file= ---key-file= - -### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and set the below parameter. ---client-cert-auth="true" - -### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and either remove the --auto-tls parameter or set it to false. ---auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-102 ETCD_UNSUPPORTED_ARCH= FILE_HASH=755e8914c854015cfb808b8456f808644387876672add1f9e19564c58f754595 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=78088791fd2612fad13ce760ef91a0ee HOME=/ -``` - -### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Follow the etcd service documentation and configure peer TLS encryption as appropriate -for your etcd cluster. -Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the -master node and set the below parameters. ---peer-client-file= ---peer-key-file= - -### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and set the below parameter. ---peer-client-cert-auth=true - -### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) - - -**Result:** pass - -**Remediation:** -Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master -node and either remove the --peer-auto-tls parameter or set it to false. ---peer-auto-tls=false - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Expected Result**: - -```console -'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-102 ETCD_UNSUPPORTED_ARCH= FILE_HASH=755e8914c854015cfb808b8456f808644387876672add1f9e19564c58f754595 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=78088791fd2612fad13ce760ef91a0ee HOME=/ -``` - -### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) - - -**Result:** pass - -**Remediation:** -[Manual test] -Follow the etcd documentation and create a dedicated certificate authority setup for the -etcd service. -Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the -master node and set the below parameter. ---trusted-ca-file= - -**Audit:** - -```bash -/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep -``` - -**Audit Config:** - -```bash -cat /var/lib/rancher/rke2/server/db/etcd/config -``` - -**Expected Result**: - -```console -'ETCD_TRUSTED_CA_FILE' is present OR '{.peer-transport-security.trusted-ca-file}' is equal to '/var/lib/rancher/rke2/server/tls/etcd/peer-ca.crt' -``` - -**Returned Value**: - -```console -PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-31-102 ETCD_UNSUPPORTED_ARCH= FILE_HASH=755e8914c854015cfb808b8456f808644387876672add1f9e19564c58f754595 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=78088791fd2612fad13ce760ef91a0ee HOME=/ -``` - -## 3.1 Authentication and Authorization -### 3.1.1 Client certificate authentication should not be used for users (Manual) - - -**Result:** warn - -**Remediation:** -Alternative mechanisms provided by Kubernetes such as the use of OIDC should be -implemented in place of client certificates. - -## 3.2 Logging -### 3.2.1 Ensure that a minimal audit policy is created (Automated) - - -**Result:** pass - -**Remediation:** -Create an audit policy file for your cluster. - -**Audit:** - -```bash -/bin/ps -ef | grep kube-apiserver | grep -v grep | grep -o audit-policy-file -``` - -**Expected Result**: - -```console -'audit-policy-file' is equal to 'audit-policy-file' -``` - -**Returned Value**: - -```console -audit-policy-file -``` - -### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) - - -**Result:** warn - -**Remediation:** -Review the audit policy provided for the cluster and ensure that it covers -at least the following areas, -- Access to Secrets managed by the cluster. Care should be taken to only - log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in - order to avoid risk of logging sensitive data. -- Modification of Pod and Deployment objects. -- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. - For most requests, minimally logging at the Metadata level is recommended - (the most basic level of logging). - -## 4.1 Worker Node Configuration Files -### 4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chmod 644 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) - - -**Result:** Not Applicable - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf - -### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 644, expected 644 or more restrictive OR '/var/lib/rancher/rke2/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, chown root:root /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is present OR '/var/lib/rancher/rke2/agent/kubeproxy.kubeconfig' is not present -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chmod 644 /var/lib/rancher/rke2/agent/kubelet.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'644' is equal to '644' -``` - -**Returned Value**: - -```console -permissions=644 -``` - -### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the below command (based on the file location on your system) on the each worker node. -For example, -chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig - -**Audit:** - -```bash -/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the file permissions of the ---client-ca-file chmod 644 - -**Audit Script:** `check_cafile_permissions.sh` - -```bash -#!/usr/bin/env bash - -CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') -CAFILE=/node$CAFILE -if test -z $CAFILE; then CAFILE=$kubeletcafile; fi -if test -e $CAFILE; then stat -c permissions=%a $CAFILE; fi - -``` - -**Audit Execution:** - -```bash -./check_cafile_permissions.sh -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) - - -**Result:** pass - -**Remediation:** -Run the following command to modify the ownership of the --client-ca-file. -chown root:root - -**Audit Script:** `check_cafile_ownership.sh` - -```bash -#!/usr/bin/env bash - -CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') -CAFILE=/node$CAFILE -if test -z $CAFILE; then CAFILE=$kubeletcafile; fi -if test -e $CAFILE; then stat -c %U:%G $CAFILE; fi - -``` - -**Audit Execution:** - -```bash -./check_cafile_ownership.sh -``` - -**Expected Result**: - -```console -'root:root' is equal to 'root:root' -``` - -**Returned Value**: - -```console -root:root -``` - -### 4.1.9 Ensure that the kubelet --config configuration file has permissions set to 644 or more restrictive (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chmod 644 /etc/rancher/rke2/rke2.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/rancher/rke2/rke2.yaml; then stat -c permissions=%a /etc/rancher/rke2/rke2.yaml; fi' -``` - -**Expected Result**: - -```console -permissions has permissions 600, expected 644 or more restrictive -``` - -**Returned Value**: - -```console -permissions=600 -``` - -### 4.1.10 Ensure that the kubelet --config configuration file ownership is set to root:root (Automated) - - -**Result:** pass - -**Remediation:** -Run the following command (using the config file location identified in the Audit step) -chown root:root /etc/rancher/rke2/rke2.yaml - -**Audit:** - -```bash -/bin/sh -c 'if test -e /etc/rancher/rke2/rke2.yaml; then stat -c %U:%G /etc/rancher/rke2/rke2.yaml; fi' -``` - -**Expected Result**: - -```console -'root:root' is present -``` - -**Returned Value**: - -```console -root:root -``` - -## 4.2 Kubelet -### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to -`false`. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -`--anonymous-auth=false` -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--anonymous-auth' is equal to 'false' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If -using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---authorization-mode=Webhook -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--authorization-mode' does not have 'AlwaysAllow' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to -the location of the client CA file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_AUTHZ_ARGS variable. ---client-ca-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--client-ca-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.4 Ensure that the --read-only-port argument is set to 0 (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---read-only-port=0 -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--read-only-port' is equal to '0' OR '--read-only-port' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a -value other than 0. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---streaming-connection-idle-timeout=5m -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.streamingConnectionIdleTimeout}' is present OR '{.streamingConnectionIdleTimeout}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUJlRENDQVIrZ0F3SUJBZ0lCQURBS0JnZ3Foa2pPUFFRREFqQWtNU0l3SUFZRFZRUUREQmx5YTJVeUxYTmwKY25abGNpMWpZVUF4TmpjM05EVTFNRE0zTUI0WERUSXpNREl5TmpJek5ETTFOMW9YRFRNek1ESXlNekl6TkRNMQpOMW93SkRFaU1DQUdBMVVFQXd3WmNtdGxNaTF6WlhKMlpYSXRZMkZBTVRZM056UTFOVEF6TnpCWk1CTUdCeXFHClNNNDlBZ0VHQ0NxR1NNNDlBd0VIQTBJQUJIZXg2aVo0Q09SYmlTd1pyYmRHa2ZIaHNKb2RZaGRScDFjNklkMngKS05ITHZzZEdxeEc0V2xySVp6WTEwTDlLWDJCVk9Senp0RUZ4cDc3MTlFTnVnNDZqUWpCQU1BNEdBMVVkRHdFQgovd1FFQXdJQ3BEQVBCZ05WSFJNQkFmOEVCVEFEQVFIL01CMEdBMVVkRGdRV0JCU1pFWGkwbDNsS3dXS1U3S0x6CkgwZG5aTzVEOWpBS0JnZ3Foa2pPUFFRREFnTkhBREJFQWlCK2NQUUhLdXBJc05zU3BLVEg2NHJibFpKYTIyZ0oKdlh4TmNxb0dQSEdhUlFJZ1JJdU1hcFVKOHVyVEdxblZGckFldy81aFdOZFdRUjNyN3FXQmlrYnk0aEk9Ci0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0K server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. ---protect-kernel-defaults=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--protect-kernel-defaults' is equal to 'true' -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove the --make-iptables-util-chains argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.makeIPTablesUtilChains}' is present OR '{.makeIPTablesUtilChains}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) - - -**Result:** Not Applicable - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and remove the --hostname-override argument from the -KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -### 4.2.9 Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.eventRecordQPS}' is present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to set `tlsCertFile` to the location -of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` -to the location of the corresponding private key file. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the below parameters in KUBELET_CERTIFICATE_ARGS variable. ---tls-cert-file= ---tls-private-key-file= -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'--tls-cert-file' is present AND '--tls-private-key-file' is present -``` - -**Returned Value**: - -```console -UID PID PPID C STIME TTY TIME CMD root 3221 3096 3 23:44 ? 00:00:19 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-31-102 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=499dafa1-6719-45d4-a0c6-66109f61b011 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key -``` - -### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) - - -**Result:** pass - -**Remediation:** -If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or -remove it altogether to use the default value. -If using command line arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS -variable. -Based on your system, restart the kubelet service. For example, -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUJlRENDQVIrZ0F3SUJBZ0lCQURBS0JnZ3Foa2pPUFFRREFqQWtNU0l3SUFZRFZRUUREQmx5YTJVeUxYTmwKY25abGNpMWpZVUF4TmpjM05EVTFNRE0zTUI0WERUSXpNREl5TmpJek5ETTFOMW9YRFRNek1ESXlNekl6TkRNMQpOMW93SkRFaU1DQUdBMVVFQXd3WmNtdGxNaTF6WlhKMlpYSXRZMkZBTVRZM056UTFOVEF6TnpCWk1CTUdCeXFHClNNNDlBZ0VHQ0NxR1NNNDlBd0VIQTBJQUJIZXg2aVo0Q09SYmlTd1pyYmRHa2ZIaHNKb2RZaGRScDFjNklkMngKS05ITHZzZEdxeEc0V2xySVp6WTEwTDlLWDJCVk9Senp0RUZ4cDc3MTlFTnVnNDZqUWpCQU1BNEdBMVVkRHdFQgovd1FFQXdJQ3BEQVBCZ05WSFJNQkFmOEVCVEFEQVFIL01CMEdBMVVkRGdRV0JCU1pFWGkwbDNsS3dXS1U3S0x6CkgwZG5aTzVEOWpBS0JnZ3Foa2pPUFFRREFnTkhBREJFQWlCK2NQUUhLdXBJc05zU3BLVEg2NHJibFpKYTIyZ0oKdlh4TmNxb0dQSEdhUlFJZ1JJdU1hcFVKOHVyVEdxblZGckFldy81aFdOZFdRUjNyN3FXQmlrYnk0aEk9Ci0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0K server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) - - -**Result:** pass - -**Remediation:** -Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf -on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. ---feature-gates=RotateKubeletServerCertificate=true -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{.featureGates.RotateKubeletServerCertificate}' is present OR '{.featureGates.RotateKubeletServerCertificate}' is not present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) - - -**Result:** warn - -**Remediation:** -If using a Kubelet config file, edit the file to set `TLSCipherSuites` to -TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -or to a subset of these values. -If using executable arguments, edit the kubelet service file -/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and -set the --tls-cipher-suites parameter as follows, or to a subset of these values. ---tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 -Based on your system, restart the kubelet service. For example: -systemctl daemon-reload -systemctl restart kubelet.service - -**Audit:** - -```bash -/bin/ps -fC kubelet -``` - -**Audit Config:** - -```bash -/bin/cat /etc/rancher/rke2/rke2.yaml -``` - -**Expected Result**: - -```console -'{range .tlsCipherSuites[:]}{}{','}{end}' is present -``` - -**Returned Value**: - -```console -apiVersion: v1 clusters: - cluster: certificate-authority-data: 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 server: https://127.0.0.1:6443 name: default contexts: - context: cluster: default user: default name: default current-context: default kind: Config preferences: {} users: - name: default user: client-certificate-data: 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 client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUQ4MXVnTGVmd0EvekE2U2l0V3czeDNiQWRHQ3A2eXJqYmNSRE14eFgwd3FvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFTmZTSUNYa2EwVmpVM25mMDBJTk9ZREttaXlEb1VEQmlCU1J2a2gwVXpHTGhTd0Q4YTdZOQoxbCt6c1J3OVFvVFlONDgxYXlaKzlHL29qeHh0a09mMWpBPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo= -``` - -## 5.1 RBAC and Service Accounts -### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) - - -**Result:** warn - -**Remediation:** -Identify all clusterrolebindings to the cluster-admin role. Check if they are used and -if they need this role or if they could use a role with fewer privileges. -Where possible, first bind users to a lower privileged role and then remove the -clusterrolebinding to the cluster-admin role : -kubectl delete clusterrolebinding [name] - -### 5.1.2 Minimize access to secrets (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove get, list and watch access to Secret objects in the cluster. - -### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) - - -**Result:** warn - -**Remediation:** -Where possible replace any use of wildcards in clusterroles and roles with specific -objects or actions. - -### 5.1.4 Minimize access to create pods (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove create access to pod objects in the cluster. - -### 5.1.5 Ensure that default service accounts are not actively used. (Automated) - - -**Result:** pass - -**Remediation:** -Create explicit service accounts wherever a Kubernetes workload requires specific access -to the Kubernetes API server. -Modify the configuration of each default service account to include this value -automountServiceAccountToken: false - -**Audit Script:** `check_for_default_sa.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) -if [[ ${count_sa} -gt 0 ]]; then - echo "false" - exit -fi - -for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") -do - for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[].kind=="ServiceAccount" and .subjects[].name=="default") or (.subjects[].kind=="Group" and .subjects[].name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') - do - read kind name <<<$(IFS=","; echo $result) - resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[] != "podsecuritypolicies")' | wc -l) - if [[ ${resource_count} -gt 0 ]]; then - echo "false" - exit - fi - done -done - - -echo "true" -``` - -**Audit Execution:** - -```bash -./check_for_default_sa.sh -``` - -**Expected Result**: - -```console -'true' is equal to 'true' -``` - -**Returned Value**: - -```console -Error from server (Forbidden): serviceaccounts is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "serviceaccounts" in API group "" at the cluster scope Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "calico-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-fleet-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-impersonation-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cattle-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "cis-operator-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "default" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-node-lease" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-public" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "kube-system" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "local" Error from server (Forbidden): clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope Error from server (Forbidden): rolebindings.rbac.authorization.k8s.io is forbidden: User "system:serviceaccount:cis-operator-system:cis-serviceaccount" cannot list resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "tigera-operator" true -``` - -### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) - - -**Result:** warn - -**Remediation:** -Modify the definition of pods and service accounts which do not need to mount service -account tokens to disable it. - -### 5.1.7 Avoid use of system:masters group (Manual) - - -**Result:** warn - -**Remediation:** -Remove the system:masters group from all users in the cluster. - -### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) - - -**Result:** warn - -**Remediation:** -Where possible, remove the impersonate, bind and escalate rights from subjects. - -## 5.2 Pod Security Standards -### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that either Pod Security Admission or an external policy control system is in place -for every namespace which contains user workloads. - -### 5.2.2 Minimize the admission of privileged containers (Manual) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of privileged containers. - -**Audit:** - -```bash -kubectl get psp global-restricted-psp -o json | jq -r '.spec.runAsUser.rule' -``` - -**Expected Result**: - -```console -'MustRunAsNonRoot' is present -``` - -**Returned Value**: - -```console -MustRunAsNonRoot -``` - -### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostPID` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=5 -``` - -### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostIPC` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=5 -``` - -### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of `hostNetwork` containers. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=2 -``` - -### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=4 -``` - -### 5.2.7 Minimize the admission of root containers (Automated) - - -**Result:** pass - -**Remediation:** -Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` -or `MustRunAs` with the range of UIDs not including 0, is set. - -**Audit:** - -```bash -kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=4 -``` - -### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) - - -**Result:** pass - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with the `NET_RAW` capability. - -**Audit:** - -```bash -kubectl get psp global-restricted-psp -o json | jq -r .spec.requiredDropCapabilities[] -``` - -**Expected Result**: - -```console -'ALL' is present -``` - -**Returned Value**: - -```console -ALL -``` - -### 5.2.9 Minimize the admission of containers with added capabilities (Automated) - - -**Result:** warn - -**Remediation:** -Ensure that `allowedCapabilities` is not present in policies for the cluster unless -it is set to an empty array. - -### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) - - -**Result:** warn - -**Remediation:** -Review the use of capabilites in applications running on your cluster. Where a namespace -contains applicaions which do not require any Linux capabities to operate consider adding -a PSP which forbids the admission of containers which do not drop all capabilities. - -### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. - -### 5.2.12 Minimize the admission of HostPath volumes (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers with `hostPath` volumes. - -### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) - - -**Result:** warn - -**Remediation:** -Add policies to each namespace in the cluster which has user workloads to restrict the -admission of containers which use `hostPort` sections. - -## 5.3 Network Policies and CNI -### 5.3.1 Ensure that the CNI in use supports Network Policies (Automated) - - -**Result:** pass - -**Remediation:** -If the CNI plugin in use does not support network policies, consideration should be given to -making use of a different plugin, or finding an alternate mechanism for restricting traffic -in the Kubernetes cluster. - -**Audit:** - -```bash -kubectl get pods --all-namespaces --selector='k8s-app in (calico-node, canal, cilium)' -o name | wc -l | xargs -I {} echo '--count={}' -``` - -**Expected Result**: - -```console -'count' is greater than 0 -``` - -**Returned Value**: - -```console ---count=1 -``` - -### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) - - -**Result:** pass - -**Remediation:** -Follow the documentation and create NetworkPolicy objects as you need them. - -**Audit Script:** `check_for_rke2_network_policies.sh` - -```bash -#!/bin/bash - -set -eE - -handle_error() { - echo "false" -} - -trap 'handle_error' ERR - -for namespace in kube-system kube-public default; do - policy_count=$(/var/lib/rancher/rke2/bin/kubectl get networkpolicy -n ${namespace} -o json | jq -r '.items | length') - if [ ${policy_count} -eq 0 ]; then - echo "false" - exit - fi -done - -echo "true" - -``` - -**Audit Execution:** - -```bash -./check_for_rke2_network_policies.sh -``` - -**Expected Result**: - -```console -'true' is present -``` - -**Returned Value**: - -```console -true -``` - -## 5.4 Secrets Management -### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) - - -**Result:** warn - -**Remediation:** -If possible, rewrite application code to read Secrets from mounted secret files, rather than -from environment variables. - -### 5.4.2 Consider external secret storage (Manual) - - -**Result:** warn - -**Remediation:** -Refer to the Secrets management options offered by your cloud provider or a third-party -secrets management solution. - -## 5.5 Extensible Admission Control -### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and setup image provenance. - -## 5.7 General Policies -### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) - - -**Result:** warn - -**Remediation:** -Follow the documentation and create namespaces for objects in your deployment as you need -them. - -### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) - - -**Result:** warn - -**Remediation:** -Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. -An example is as below: -securityContext: -seccompProfile: -type: RuntimeDefault - -### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) - - -**Result:** warn - -**Remediation:** -Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a -suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker -Containers. - -### 5.7.4 The default namespace should not be used (Manual) - - -**Result:** warn - -**Remediation:** -Ensure that namespaces are created to allow for appropriate segregation of Kubernetes -resources and that all new resources are created in a specific namespace. diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md new file mode 100644 index 00000000000..ba80c0a516a --- /dev/null +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24.md @@ -0,0 +1,3202 @@ +--- +title: RKE2 Self-Assessment Guide - CIS Benchmark v1.24 - K8s v1.24 +--- + + + + + +This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.24 | Kubernetes v1.24 | + +This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE2 install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.24. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +RKE2 launches control plane components as static pods, managed by the kubelet, and uses containerd as the container runtime. Configuration is defined by arguments passed to the container at the time of initialization or via configuration file. + +Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE2 nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 644 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 644 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %a /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' +``` + +**Expected Result**: + +```console +'600' is present +``` + +**Returned Value**: + +```console +644 +``` + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' +``` + +**Expected Result**: + +```console +'permissions' is equal to '600' +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 644 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 644 /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' +``` + +**Expected Result**: + +```console +'644' is equal to '644' +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=644 +``` + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root root:root +``` + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/db/etcd +``` + +**Expected Result**: + +```console +permissions has permissions 700, expected 700 or more restrictive +``` + +**Returned Value**: + +```console +permissions=700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/db/etcd +``` + +**Expected Result**: + +```console +'etcd:etcd' is present +``` + +**Returned Value**: + +```console +etcd:etcd +``` + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/admin.conf + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/cred/admin.kubeconfig +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/admin.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 scheduler + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root scheduler + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 controllermanager + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/cred/controller.kubeconfig +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/server/cred/controller.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/controller.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /var/lib/rancher/rke2/server/tls/ + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/tls +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Automated) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 644 /var/lib/rancher/rke2/server/tls/*.crt + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.crt +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /var/lib/rancher/rke2/server/tls/*.key + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.key +``` + +**Expected Result**: + +```console +'permissions' is equal to '600' +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.4 Ensure that the --kubelet-https argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the --kubelet-https parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-https' is present OR '--kubelet-https' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.5 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.6 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-certificate-authority' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.7 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.9 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.10 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.12 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.13 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.14 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.15 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.16 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.17 Ensure that the --secure-port argument is not set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.18 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.19 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.20 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.21 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.22 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxsize' is greater or equal to 100 +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.24 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.25 Ensure that the --request-timeout argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true root 1017917 2489 83 16:16 ? 00:00:00 kubectl get --server=https://localhost:6443/ --client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --raw=/readyz root 1017945 2489 75 16:16 ? 00:00:00 kubectl get --server=https://localhost:6443/ --client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --raw=/livez +``` + +### 1.2.26 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.27 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.28 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.29 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.30 Ensure that the --encryption-provider-config argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +root 2548 2489 10 Sep11 ? 02:10:01 kube-apiserver --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction,PodSecurityPolicy --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.32 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 + +### 1.2.33 Ensure that encryption providers are appropriately configured (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit:** + +```bash +/bin/sh -c 'if grep aescbc /var/lib/rancher/rke2/server/cred/encryption-config.json; then echo 0; fi' +``` + +**Expected Result**: + +```console +'0' is present +``` + +**Returned Value**: + +```console +{"kind":"EncryptionConfiguration","apiVersion":"apiserver.config.k8s.io/v1","resources":[{"resources":["secrets"],"providers":[{"aescbc":{"keys":[{"name":"aescbckey","secret":"akmMjUAq94YvsUftJpiA3b+9SClu0ESPBeckAI7KZBY="}]}},{"identity":{}}]}]} 0 +``` + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 2743 2649 2 Sep11 ? 00:28:36 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2707 2593 0 Sep11 ? 00:06:20 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 2707 2593 0 Sep11 ? 00:06:20 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and set the below parameter. +--client-cert-auth="true" + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-10-113 ETCD_UNSUPPORTED_ARCH= NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=560b915d9afb672c20c2c1e8664bdf8f FILE_HASH=166aebdce42ff62fcdd2cefc9e7ed8f7c5b562d219ca6afec8f73adc654f65e7 HOME=/ +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and set the below parameter. +--peer-client-cert-auth=true + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-10-113 ETCD_UNSUPPORTED_ARCH= NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=560b915d9afb672c20c2c1e8664bdf8f FILE_HASH=166aebdce42ff62fcdd2cefc9e7ed8f7c5b562d219ca6afec8f73adc654f65e7 HOME=/ +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Audit Config:** + +```bash +cat /var/lib/rancher/rke2/server/db/etcd/config +``` + +**Expected Result**: + +```console +'ETCD_TRUSTED_CA_FILE' is present OR '{.peer-transport-security.trusted-ca-file}' is equal to '/var/lib/rancher/rke2/server/tls/etcd/peer-ca.crt' +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-10-113 ETCD_UNSUPPORTED_ARCH= NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=560b915d9afb672c20c2c1e8664bdf8f FILE_HASH=166aebdce42ff62fcdd2cefc9e7ed8f7c5b562d219ca6afec8f73adc654f65e7 HOME=/ +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Automated) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep | grep -o audit-policy-file +``` + +**Expected Result**: + +```console +'audit-policy-file' is equal to 'audit-policy-file' +``` + +**Returned Value**: + +```console +audit-policy-file +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'600' is present +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit Script:** `check_cafile_permissions.sh` + +```bash +#!/usr/bin/env bash + +CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') +CAFILE=/node$CAFILE +if test -z $CAFILE; then CAFILE=$kubeletcafile; fi +if test -e $CAFILE; then stat -c permissions=%a $CAFILE; fi + +``` + +**Audit Execution:** + +```bash +./check_cafile_permissions.sh +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit Script:** `check_cafile_ownership.sh` + +```bash +#!/usr/bin/env bash + +CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') +CAFILE=/node$CAFILE +if test -z $CAFILE; then CAFILE=$kubeletcafile; fi +if test -e $CAFILE; then stat -c %U:%G $CAFILE; fi + +``` + +**Audit Execution:** + +```bash +./check_cafile_ownership.sh +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.streamingConnectionIdleTimeout}' is present OR '{.streamingConnectionIdleTimeout}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.6 Ensure that the --protect-kernel-defaults argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `protectKernelDefaults` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--protect-kernel-defaults=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--protect-kernel-defaults' is equal to 'true' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.7 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.makeIPTablesUtilChains}' is present OR '{.makeIPTablesUtilChains}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.8 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +### 4.2.9 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Automated) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.eventRecordQPS}' is present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.10 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2291 2246 4 Sep11 ? 00:50:01 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-10-113 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=6685035f-32be-4d1b-a06d-7ea5f42467f5 --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.11 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.12 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** pass + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.featureGates.RotateKubeletServerCertificate}' is present OR '{.featureGates.RotateKubeletServerCertificate}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.13 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{range .tlsCipherSuites[:]}{}{','}{end}' is present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Automated) + + +**Result:** pass + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +**Audit Script:** `check_for_default_sa.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +count_sa=$(kubectl get serviceaccounts --all-namespaces -o json | jq -r '.items[] | select(.metadata.name=="default") | select((.automountServiceAccountToken == null) or (.automountServiceAccountToken == true))' | jq .metadata.namespace | wc -l) +if [[ ${count_sa} -gt 0 ]]; then + echo "false" + exit +fi + +for ns in $(kubectl get ns --no-headers -o custom-columns=":metadata.name") +do + for result in $(kubectl get clusterrolebinding,rolebinding -n $ns -o json | jq -r '.items[] | select((.subjects[]?.kind=="ServiceAccount" and .subjects[]?.name=="default") or (.subjects[]?.kind=="Group" and .subjects[]?.name=="system:serviceaccounts"))' | jq -r '"\(.roleRef.kind),\(.roleRef.name)"') + do + read kind name <<<$(IFS=","; echo $result) + resource_count=$(kubectl get $kind $name -n $ns -o json | jq -r '.rules[] | select(.resources[]? != "podsecuritypolicies")' | wc -l) + if [[ ${resource_count} -gt 0 ]]; then + echo "false" + exit + fi + done +done + + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_default_sa.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +**Audit:** + +```bash +kubectl get psp global-restricted-psp && kubectl get psp global-restricted-psp -o json | jq -r ".spec.runAsUser.rule" || kubectl get psp restricted-noroot-psp && kubectl get psp restricted-noroot-psp -o json | jq -r ".spec.runAsUser.rule" +``` + +**Expected Result**: + +```console +'MustRunAsNonRoot' is equal to 'MustRunAsNonRoot' +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ Error from server (NotFound): podsecuritypolicies.policy "global-restricted-psp" not found Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ NAME PRIV CAPS SELINUX RUNASUSER FSGROUP SUPGROUP READONLYROOTFS VOLUMES restricted-noroot-psp false RunAsAny MustRunAsNonRoot MustRunAs MustRunAs false configMap,emptyDir,projected,secret,downwardAPI,csi,persistentVolumeClaim Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ MustRunAsNonRoot +``` + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostPID == null) or (.spec.hostPID == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=5 +``` + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostIPC == null) or (.spec.hostIPC == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=5 +``` + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.hostNetwork == null) or (.spec.hostNetwork == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=2 +``` + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=4 +``` + +### 5.2.7 Minimize the admission of root containers (Automated) + + +**Result:** pass + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +**Audit:** + +```bash +kubectl get psp -o json | jq .items[] | jq -r 'select((.spec.allowPrivilegeEscalation == null) or (.spec.allowPrivilegeEscalation == false))' | jq .metadata.name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ --count=4 +``` + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Automated) + + +**Result:** pass + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +**Audit:** + +```bash +kubectl get psp global-restricted-psp && kubectl get psp global-restricted-psp -o json | jq -r .spec.requiredDropCapabilities[] || kubectl get psp restricted-noroot-psp && kubectl get psp restricted-noroot-psp -o json | jq -r .spec.requiredDropCapabilities[] +``` + +**Expected Result**: + +```console +'ALL' is equal to 'ALL' +``` + +**Returned Value**: + +```console +Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ Error from server (NotFound): podsecuritypolicies.policy "global-restricted-psp" not found Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ NAME PRIV CAPS SELINUX RUNASUSER FSGROUP SUPGROUP READONLYROOTFS VOLUMES restricted-noroot-psp false RunAsAny MustRunAsNonRoot MustRunAs MustRunAs false configMap,emptyDir,projected,secret,downwardAPI,csi,persistentVolumeClaim Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+ ALL +``` + +### 5.2.9 Minimize the admission of containers with added capabilities (Automated) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports Network Policies (Automated) + + +**Result:** pass + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +**Audit:** + +```bash +kubectl get pods --all-namespaces --selector='k8s-app in (calico-node, canal, cilium)' -o name | wc -l | xargs -I {} echo '--count={}' +``` + +**Expected Result**: + +```console +'count' is greater than 0 +``` + +**Returned Value**: + +```console +--count=1 +``` + +### 5.3.2 Ensure that all Namespaces have Network Policies defined (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +**Audit Script:** `check_for_rke2_network_policies.sh` + +```bash +#!/bin/bash + +set -eE + +handle_error() { + echo "false" +} + +trap 'handle_error' ERR + +for namespace in kube-system kube-public default; do + policy_count=$(/var/lib/rancher/rke2/bin/kubectl get networkpolicy -n ${namespace} -o json | jq -r '.items | length') + if [ ${policy_count} -eq 0 ]; then + echo "false" + exit + fi +done + +echo "true" + +``` + +**Audit Execution:** + +```bash +./check_for_rke2_network_policies.sh +``` + +**Expected Result**: + +```console +'true' is equal to 'true' +``` + +**Returned Value**: + +```console +true +``` + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md new file mode 100644 index 00000000000..b7d4a36ea4b --- /dev/null +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27.md @@ -0,0 +1,2967 @@ +--- +title: RKE2 Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25/v1.26/v1.27 +--- + + + + + +This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. + +This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: + +| Rancher Version | CIS Benchmark Version | Kubernetes Version | +|-----------------|-----------------------|--------------------| +| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25/v1.26/v1.27 | + +This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE2 install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. + +This document is for Rancher operators, security teams, auditors and decision makers. + +For more information about each control, including detailed descriptions and remediations for failing tests, refer to the corresponding section of the CIS Kubernetes Benchmark v1.7. You can download the benchmark, after creating a free account, at [Center for Internet Security (CIS)](https://www.cisecurity.org/benchmark/kubernetes/). + +## Testing Methodology + +RKE2 launches control plane components as static pods, managed by the kubelet, and uses containerd as the container runtime. Configuration is defined by arguments passed to the container at the time of initialization or via configuration file. + +Where control audits differ from the original CIS benchmark, the audit commands specific to Rancher are provided for testing. When performing the tests, you will need access to the command line on the hosts of all RKE2 nodes. The commands also make use of the [kubectl](https://kubernetes.io/docs/tasks/tools/) (with a valid configuration file) and [jq](https://stedolan.github.io/jq/) tools, which are required in the testing and evaluation of test results. + +:::note + +This guide only covers `automated` (previously called `scored`) tests. + +::: + +### Controls + +## 1.1 Control Plane Node Configuration Files +### 1.1.1 Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the +control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.2 Ensure that the API server pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.4 Ensure that the controller manager pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.5 Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c permissions=%a /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.6 Ensure that the scheduler pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.7 Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then find /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml -name '*etcd*' | xargs stat -c permissions=%a; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.8 Ensure that the etcd pod specification file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; then stat -c %U:%G /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.9 Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=644 +``` + +### 1.1.10 Ensure that the Container Network Interface file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root + +**Audit:** + +```bash +ps -fC ${kubeletbin:-kubelet} | grep -- --cni-conf-dir || echo "/etc/cni/net.d" | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c %U:%G find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root root:root +``` + +### 1.1.11 Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated) + + +**Result:** pass + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). For example, +chmod 700 /var/lib/etcd + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/db/etcd +``` + +**Expected Result**: + +```console +permissions has permissions 700, expected 700 or more restrictive +``` + +**Returned Value**: + +```console +permissions=700 +``` + +### 1.1.12 Ensure that the etcd data directory ownership is set to etcd:etcd (Automated) + + +**Result:** Not Applicable + +**Remediation:** +On the etcd server node, get the etcd data directory, passed as an argument --data-dir, +from the command 'ps -ef | grep etcd'. +Run the below command (based on the etcd data directory found above). +For example, chown etcd:etcd /var/lib/etcd + +### 1.1.13 Ensure that the admin.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chmod 600 /etc/kubernetes/admin.conf + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/cred/admin.kubeconfig +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.14 Ensure that the admin.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, chown root:root /etc/kubernetes/admin.conf + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/admin.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.15 Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'600' is present +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.16 Ensure that the scheduler.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/scheduler.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.17 Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod 600 /var/lib/rancher/rke2/server/cred/controller.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/server/cred/controller.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'600' is present +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 1.1.18 Ensure that the controller-manager.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown root:root /var/lib/rancher/rke2/server/cred/controller.kubeconfig + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/cred/controller.kubeconfig +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.19 Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chown -R root:root /etc/kubernetes/pki/ + +**Audit:** + +```bash +stat -c %U:%G /var/lib/rancher/rke2/server/tls +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 1.1.20 Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /var/lib/rancher/rke2/server/tls/*.crt + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.crt +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 permissions=644 +``` + +### 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the control plane node. +For example, +chmod -R 600 /var/lib/rancher/rke2/server/tls/*.key + +**Audit:** + +```bash +stat -c permissions=%a /var/lib/rancher/rke2/server/tls/*.key +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 permissions=600 +``` + +## 1.2 API Server +### 1.2.1 Ensure that the --anonymous-auth argument is set to false (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--anonymous-auth=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +### 1.2.2 Ensure that the --token-auth-file parameter is not set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and configure alternate mechanisms for authentication. Then, +edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the --token-auth-file= parameter. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--token-auth-file' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.3 Ensure that the --DenyServiceExternalIPs is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and remove the `DenyServiceExternalIPs` +from enabled admission plugins. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'DenyServiceExternalIPs' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.4 Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the +apiserver and kubelets. Then, edit API server pod specification file +/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the +kubelet client certificate and key parameters as below. +--kubelet-client-certificate= +--kubelet-client-key= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-client-certificate' is present AND '--kubelet-client-key' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.5 Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and setup the TLS connection between +the apiserver and kubelets. Then, edit the API server pod specification file +/var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml on the control plane node and set the +--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority. +--kubelet-certificate-authority= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--kubelet-certificate-authority' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.6 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow. +One such example could be as below. +--authorization-mode=RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.7 Ensure that the --authorization-mode argument includes Node (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes Node. +--authorization-mode=Node,RBAC + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'Node' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.8 Ensure that the --authorization-mode argument includes RBAC (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --authorization-mode parameter to a value that includes RBAC, +for example `--authorization-mode=Node,RBAC`. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--authorization-mode' has 'RBAC' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.9 Ensure that the admission control plugin EventRateLimit is set (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and set the desired limits in a configuration file. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +and set the below parameters. +--enable-admission-plugins=...,EventRateLimit,... +--admission-control-config-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'EventRateLimit' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.10 Ensure that the admission control plugin AlwaysAdmit is not set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a +value that does not include AlwaysAdmit. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' does not have 'AlwaysAdmit' OR '--enable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.11 Ensure that the admission control plugin AlwaysPullImages is set (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +AlwaysPullImages. +--enable-admission-plugins=...,AlwaysPullImages,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'AlwaysPullImages' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.12 Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual) + + +**Result:** warn + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to include +SecurityContextDeny, unless PodSecurityPolicy is already in place. +--enable-admission-plugins=...,SecurityContextDeny,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'SecurityContextDeny' OR '--enable-admission-plugins' has 'PodSecurityPolicy' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.13 Ensure that the admission control plugin ServiceAccount is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the documentation and create ServiceAccount objects as per your environment. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and ensure that the --disable-admission-plugins parameter is set to a +value that does not include ServiceAccount. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true root 1018768 2419 99 16:17 ? 00:00:00 kubectl get --server=https://localhost:6443/ --client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --raw=/readyz +``` + +### 1.2.14 Ensure that the admission control plugin NamespaceLifecycle is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --disable-admission-plugins parameter to +ensure it does not include NamespaceLifecycle. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--disable-admission-plugins' is present OR '--disable-admission-plugins' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.15 Ensure that the admission control plugin NodeRestriction is set (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --enable-admission-plugins parameter to a +value that includes NodeRestriction. +--enable-admission-plugins=...,NodeRestriction,... + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--enable-admission-plugins' has 'NodeRestriction' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.16 Ensure that the --secure-port argument is not set to 0 - NoteThis recommendation is obsolete and will be deleted per the consensus process (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and either remove the --secure-port parameter or +set it to a different (non-zero) desired port. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--secure-port' is greater than 0 OR '--secure-port' is not present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.17 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.18 Ensure that the --audit-log-path argument is set (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-path parameter to a suitable path and +file where you would like audit logs to be written, for example, +--audit-log-path=/var/log/apiserver/audit.log + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-path' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.19 Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxage parameter to 30 +or as an appropriate number of days, for example, +--audit-log-maxage=30 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxage' is greater or equal to 30 +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.20 Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate +value. For example, +--audit-log-maxbackup=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-log-maxbackup' is greater or equal to 10 +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.21 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB. +For example, to set it as 100 MB, --audit-log-maxsize=100 + +### 1.2.22 Ensure that the --request-timeout argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +and set the below parameter as appropriate and if needed. +For example, --request-timeout=300s + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--request-timeout' is not present OR '--request-timeout' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.23 Ensure that the --service-account-lookup argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--service-account-lookup=true +Alternatively, you can delete the --service-account-lookup parameter from this file so +that the default takes effect. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-lookup' is not present OR '--service-account-lookup' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.24 Ensure that the --service-account-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --service-account-key-file parameter +to the public key file for service accounts. For example, +--service-account-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-key-file' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.25 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate and key file parameters. +--etcd-certfile= +--etcd-keyfile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-certfile' is present AND '--etcd-keyfile' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.26 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the TLS certificate and private key file parameters. +--tls-cert-file= +--tls-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.27 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection on the apiserver. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the client certificate authority file. +--client-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.28 Ensure that the --etcd-cafile argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the etcd certificate authority file parameter. +--etcd-cafile= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--etcd-cafile' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.29 Ensure that the --encryption-provider-config argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +Then, edit the API server pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-apiserver.yaml +on the control plane node and set the --encryption-provider-config parameter to the path of that file. +For example, --encryption-provider-config= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--encryption-provider-config' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.2.30 Ensure that encryption providers are appropriately configured (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and configure a EncryptionConfig file. +In this file, choose aescbc, kms or secretbox as the encryption provider. + +**Audit:** + +```bash +ENCRYPTION_PROVIDER_CONFIG=$(ps -ef | grep kube-apiserver | grep -- --encryption-provider-config | sed 's%.*encryption-provider-config[= ]\([^ ]*\).*%\1%') if test -e $ENCRYPTION_PROVIDER_CONFIG; then grep -A1 'providers:' $ENCRYPTION_PROVIDER_CONFIG | tail -n1 | grep -o "[A-Za-z]*" | sed 's/^/provider=/'; fi +``` + +**Expected Result**: + +```console +'provider' is present +``` + +### 1.2.31 Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml +on the control plane node and set the below parameter. +--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, +TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, +TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, +TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA, +TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384 +Not Applicable. + +## 1.3 Controller Manager +### 1.3.1 Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold, +for example, --terminated-pod-gc-threshold=10 + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--terminated-pod-gc-threshold' is present +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.2 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.3 Ensure that the --use-service-account-credentials argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node to set the below parameter. +--use-service-account-credentials=true + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--use-service-account-credentials' is not equal to 'false' +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --service-account-private-key-file parameter +to the private key file for service accounts. +--service-account-private-key-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--service-account-private-key-file' is present +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.5 Ensure that the --root-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --root-ca-file parameter to the certificate bundle file`. +--root-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--root-ca-file' is present +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 1.3.6 Ensure that the RotateKubeletServerCertificate argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true. +--feature-gates=RotateKubeletServerCertificate=true + +### 1.3.7 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Controller Manager pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-controller-manager.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-controller-manager | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +## 1.4 Scheduler +### 1.4.1 Ensure that the --profiling argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml file +on the control plane node and set the below parameter. +--profiling=false + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--profiling' is equal to 'false' +``` + +**Returned Value**: + +```console +root 2645 2538 0 Sep11 ? 00:05:26 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 +``` + +### 1.4.2 Ensure that the --bind-address argument is set to 127.0.0.1 (Automated) + + +**Result:** pass + +**Remediation:** +Edit the Scheduler pod specification file /var/lib/rancher/rke2/agent/pod-manifests/kube-scheduler.yaml +on the control plane node and ensure the correct value for the --bind-address parameter + +**Audit:** + +```bash +/bin/ps -ef | grep kube-scheduler | grep -v grep +``` + +**Expected Result**: + +```console +'--bind-address' is equal to '127.0.0.1' OR '--bind-address' is not present +``` + +**Returned Value**: + +```console +root 2645 2538 0 Sep11 ? 00:05:26 kube-scheduler --permit-port-sharing=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-scheduler --kubeconfig=/var/lib/rancher/rke2/server/cred/scheduler.kubeconfig --profiling=false --secure-port=10259 +``` + +## 2 Etcd Node Configuration +### 2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the etcd service documentation and configure TLS encryption. +Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml +on the master node and set the below parameters. +--cert-file= +--key-file= +Not Applicable. + +### 2.2 Ensure that the --client-cert-auth argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and set the below parameter. +--client-cert-auth="true" +Not Applicable. + +### 2.3 Ensure that the --auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and either remove the --auto-tls parameter or set it to false. + --auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_AUTO_TLS' is not present OR 'ETCD_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-14-226 ETCD_UNSUPPORTED_ARCH= FILE_HASH=e9ca6f328e70dd3c17ba78c302ee32927a4961198e95d1d948114a5d7e350d99 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=aa1658a59ab75324ef67c786d08307e3 HOME=/ +``` + +### 2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Follow the etcd service documentation and configure peer TLS encryption as appropriate +for your etcd cluster. +Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the +master node and set the below parameters. +--peer-client-file= +--peer-key-file= +Not Applicable. + +### 2.5 Ensure that the --peer-client-cert-auth argument is set to true (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and set the below parameter. +--peer-client-cert-auth=true +Not Applicable. + +### 2.6 Ensure that the --peer-auto-tls argument is not set to true (Automated) + + +**Result:** pass + +**Remediation:** +Edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the master +node and either remove the --peer-auto-tls parameter or set it to false. +--peer-auto-tls=false + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Expected Result**: + +```console +'ETCD_PEER_AUTO_TLS' is not present OR 'ETCD_PEER_AUTO_TLS' is present +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-14-226 ETCD_UNSUPPORTED_ARCH= FILE_HASH=e9ca6f328e70dd3c17ba78c302ee32927a4961198e95d1d948114a5d7e350d99 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=aa1658a59ab75324ef67c786d08307e3 HOME=/ +``` + +### 2.7 Ensure that a unique Certificate Authority is used for etcd (Automated) + + +**Result:** pass + +**Remediation:** +[Manual test] +Follow the etcd documentation and create a dedicated certificate authority setup for the +etcd service. +Then, edit the etcd pod specification file /var/lib/rancher/rke2/agent/pod-manifests/etcd.yaml on the +master node and set the below parameter. +--trusted-ca-file= + +**Audit:** + +```bash +/bin/ps -ef | /bin/grep etcd | /bin/grep -v grep +``` + +**Audit Config:** + +```bash +cat /var/lib/rancher/rke2/server/db/etcd/config +``` + +**Expected Result**: + +```console +'ETCD_TRUSTED_CA_FILE' is present OR '{.peer-transport-security.trusted-ca-file}' is equal to '/var/lib/rancher/rke2/server/tls/etcd/peer-ca.crt' +``` + +**Returned Value**: + +```console +PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=ip-172-31-14-226 ETCD_UNSUPPORTED_ARCH= FILE_HASH=e9ca6f328e70dd3c17ba78c302ee32927a4961198e95d1d948114a5d7e350d99 NO_PROXY=.svc,.cluster.local,10.42.0.0/16,10.43.0.0/16 POD_HASH=aa1658a59ab75324ef67c786d08307e3 HOME=/ +``` + +## 3.1 Authentication and Authorization +### 3.1.1 Client certificate authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be +implemented in place of client certificates. + +### 3.1.2 Service account token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of service account tokens. + +### 3.1.3 Bootstrap token authentication should not be used for users (Manual) + + +**Result:** warn + +**Remediation:** +Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented +in place of bootstrap tokens. + +## 3.2 Logging +### 3.2.1 Ensure that a minimal audit policy is created (Automated) + + +**Result:** pass + +**Remediation:** +Create an audit policy file for your cluster. + +**Audit:** + +```bash +/bin/ps -ef | grep kube-apiserver | grep -v grep +``` + +**Expected Result**: + +```console +'--audit-policy-file' is present +``` + +**Returned Value**: + +```console +root 2489 2419 8 Sep11 ? 01:41:54 kube-apiserver --admission-control-config-file=/etc/rancher/rke2/rke2-pss.yaml --audit-policy-file=/etc/rancher/rke2/audit-policy.yaml --audit-log-maxage=30 --audit-log-maxbackup=10 --audit-log-maxsize=100 --audit-log-path=/var/lib/rancher/rke2/server/logs/audit.log --admission-control-config-file=/etc/rancher/rke2/config/rancher-psact.yaml --allow-privileged=true --anonymous-auth=false --api-audiences=https://kubernetes.default.svc.cluster.local,rke2 --authorization-mode=Node,RBAC --bind-address=0.0.0.0 --cert-dir=/var/lib/rancher/rke2/server/tls/temporary-certs --client-ca-file=/var/lib/rancher/rke2/server/tls/client-ca.crt --egress-selector-config-file=/var/lib/rancher/rke2/server/etc/egress-selector-config.yaml --enable-admission-plugins=NodeRestriction --enable-aggregator-routing=true --enable-bootstrap-token-auth=true --encryption-provider-config=/var/lib/rancher/rke2/server/cred/encryption-config.json --etcd-cafile=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --etcd-certfile=/var/lib/rancher/rke2/server/tls/etcd/client.crt --etcd-keyfile=/var/lib/rancher/rke2/server/tls/etcd/client.key --etcd-servers=https://127.0.0.1:2379 --feature-gates=JobTrackingWithFinalizers=true --kubelet-certificate-authority=/var/lib/rancher/rke2/server/tls/server-ca.crt --kubelet-client-certificate=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.crt --kubelet-client-key=/var/lib/rancher/rke2/server/tls/client-kube-apiserver.key --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname --profiling=false --proxy-client-cert-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.crt --proxy-client-key-file=/var/lib/rancher/rke2/server/tls/client-auth-proxy.key --requestheader-allowed-names=system:auth-proxy --requestheader-client-ca-file=/var/lib/rancher/rke2/server/tls/request-header-ca.crt --requestheader-extra-headers-prefix=X-Remote-Extra- --requestheader-group-headers=X-Remote-Group --requestheader-username-headers=X-Remote-User --secure-port=6443 --service-account-issuer=https://kubernetes.default.svc.cluster.local --service-account-key-file=/var/lib/rancher/rke2/server/tls/service.key --service-account-signing-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --service-node-port-range=30000-32767 --storage-backend=etcd3 --tls-cert-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.crt --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --tls-private-key-file=/var/lib/rancher/rke2/server/tls/serving-kube-apiserver.key root 2652 2539 2 Sep11 ? 00:24:53 kube-controller-manager --flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins --terminated-pod-gc-threshold=1000 --permit-port-sharing=true --allocate-node-cidrs=true --authentication-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --authorization-kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --bind-address=127.0.0.1 --cert-dir=/var/lib/rancher/rke2/server/tls/kube-controller-manager --cluster-cidr=10.42.0.0/16 --cluster-signing-kube-apiserver-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kube-apiserver-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-client-cert-file=/var/lib/rancher/rke2/server/tls/client-ca.nochain.crt --cluster-signing-kubelet-client-key-file=/var/lib/rancher/rke2/server/tls/client-ca.key --cluster-signing-kubelet-serving-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-kubelet-serving-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --cluster-signing-legacy-unknown-cert-file=/var/lib/rancher/rke2/server/tls/server-ca.nochain.crt --cluster-signing-legacy-unknown-key-file=/var/lib/rancher/rke2/server/tls/server-ca.key --configure-cloud-routes=false --controllers=*,tokencleaner,-service,-route,-cloud-node-lifecycle --feature-gates=JobTrackingWithFinalizers=true --kubeconfig=/var/lib/rancher/rke2/server/cred/controller.kubeconfig --profiling=false --root-ca-file=/var/lib/rancher/rke2/server/tls/server-ca.crt --secure-port=10257 --service-account-private-key-file=/var/lib/rancher/rke2/server/tls/service.current.key --service-cluster-ip-range=10.43.0.0/16 --use-service-account-credentials=true +``` + +### 3.2.2 Ensure that the audit policy covers key security concerns (Manual) + + +**Result:** warn + +**Remediation:** +Review the audit policy provided for the cluster and ensure that it covers +at least the following areas, +- Access to Secrets managed by the cluster. Care should be taken to only + log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in + order to avoid risk of logging sensitive data. +- Modification of Pod and Deployment objects. +- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. +For most requests, minimally logging at the Metadata level is recommended +(the most basic level of logging). + +## 4.1 Worker Node Configuration Files +### 4.1.1 Ensure that the kubelet service file permissions are set to 600 or more restrictive (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chmod 600 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not Applicable. + +### 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated) + + +**Result:** Not Applicable + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +Not applicable. + +### 4.1.3 If proxy kubeconfig file exists ensure permissions are set to 600 or more restrictive (Manual) + + +**Result:** warn + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, chown root:root /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubeproxy.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.5 Ensure that the --kubeconfig kubelet.conf file permissions are set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chmod 600 /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.6 Ensure that the --kubeconfig kubelet.conf file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the below command (based on the file location on your system) on the each worker node. +For example, +chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.7 Ensure that the certificate authorities file permissions are set to 600 or more restrictive (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the file permissions of the +--client-ca-file chmod 600 + +**Audit Script:** `check_cafile_permissions.sh` + +```bash +#!/usr/bin/env bash + +CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') +CAFILE=/node$CAFILE +if test -z $CAFILE; then CAFILE=$kubeletcafile; fi +if test -e $CAFILE; then stat -c permissions=%a $CAFILE; fi + +``` + +**Audit Execution:** + +```bash +./check_cafile_permissions.sh +``` + +**Expected Result**: + +```console +permissions has permissions 600, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=600 +``` + +### 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual) + + +**Result:** pass + +**Remediation:** +Run the following command to modify the ownership of the --client-ca-file. +chown root:root + +**Audit Script:** `check_cafile_ownership.sh` + +```bash +#!/usr/bin/env bash + +CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}') +CAFILE=/node$CAFILE +if test -z $CAFILE; then CAFILE=$kubeletcafile; fi +if test -e $CAFILE; then stat -c %U:%G $CAFILE; fi + +``` + +**Audit Execution:** + +```bash +./check_cafile_ownership.sh +``` + +**Expected Result**: + +```console +'root:root' is equal to 'root:root' +``` + +**Returned Value**: + +```console +root:root +``` + +### 4.1.9 If the kubelet config.yaml configuration file is being used validate permissions set to 600 or more restrictive (Automated) + + +**Result:** fail + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chmod 600 /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c permissions=%a /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +permissions has permissions 644, expected 600 or more restrictive +``` + +**Returned Value**: + +```console +permissions=644 +``` + +### 4.1.10 If the kubelet config.yaml configuration file is being used validate file ownership is set to root:root (Automated) + + +**Result:** pass + +**Remediation:** +Run the following command (using the config file location identified in the Audit step) +chown root:root /var/lib/rancher/rke2/agent/kubelet.kubeconfig + +**Audit:** + +```bash +/bin/sh -c 'if test -e /var/lib/rancher/rke2/agent/kubelet.kubeconfig; then stat -c %U:%G /var/lib/rancher/rke2/agent/kubelet.kubeconfig; fi' +``` + +**Expected Result**: + +```console +'root:root' is present +``` + +**Returned Value**: + +```console +root:root +``` + +## 4.2 Kubelet +### 4.2.1 Ensure that the --anonymous-auth argument is set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication: anonymous: enabled` to +`false`. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +`--anonymous-auth=false` +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--anonymous-auth' is equal to 'false' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.2 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authorization.mode` to Webhook. If +using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--authorization-mode=Webhook +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--authorization-mode' does not have 'AlwaysAllow' +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.3 Ensure that the --client-ca-file argument is set as appropriate (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `authentication.x509.clientCAFile` to +the location of the client CA file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_AUTHZ_ARGS variable. +--client-ca-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--client-ca-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.4 Verify that the --read-only-port argument is set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `readOnlyPort` to 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--read-only-port=0 +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--read-only-port' is equal to '0' OR '--read-only-port' is not present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.5 Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `streamingConnectionIdleTimeout` to a +value other than 0. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +--streaming-connection-idle-timeout=5m +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.streamingConnectionIdleTimeout}' is present OR '{.streamingConnectionIdleTimeout}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.6 Ensure that the --make-iptables-util-chains argument is set to true (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `makeIPTablesUtilChains` to `true`. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove the --make-iptables-util-chains argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.makeIPTablesUtilChains}' is present OR '{.makeIPTablesUtilChains}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.7 Ensure that the --hostname-override argument is not set (Manual) + + +**Result:** Not Applicable + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and remove the --hostname-override argument from the +KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service +Not Applicable. + +### 4.2.8 Ensure that the eventRecordQPS argument is set to a level which ensures appropriate event capture (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `eventRecordQPS` to an appropriate level. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.eventRecordQPS}' is present OR '{.eventRecordQPS}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.9 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to set `tlsCertFile` to the location +of the certificate file to use to identify this Kubelet, and `tlsPrivateKeyFile` +to the location of the corresponding private key file. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the below parameters in KUBELET_CERTIFICATE_ARGS variable. +--tls-cert-file= +--tls-private-key-file= +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'--tls-cert-file' is present AND '--tls-private-key-file' is present +``` + +**Returned Value**: + +```console +UID PID PPID C STIME TTY TIME CMD root 2236 2075 4 Sep11 ? 00:47:51 kubelet --volume-plugin-dir=/var/lib/kubelet/volumeplugins --file-check-frequency=5s --sync-frequency=30s --address=0.0.0.0 --alsologtostderr=false --anonymous-auth=false --authentication-token-webhook=true --authorization-mode=Webhook --cgroup-driver=systemd --client-ca-file=/var/lib/rancher/rke2/agent/client-ca.crt --cloud-provider=external --cluster-dns=10.43.0.10 --cluster-domain=cluster.local --container-runtime-endpoint=unix:///run/k3s/containerd/containerd.sock --containerd=/run/k3s/containerd/containerd.sock --eviction-hard=imagefs.available<5%,nodefs.available<5% --eviction-minimum-reclaim=imagefs.available=10%,nodefs.available=10% --fail-swap-on=false --healthz-bind-address=127.0.0.1 --hostname-override=ip-172-31-14-226 --kubeconfig=/var/lib/rancher/rke2/agent/kubelet.kubeconfig --log-file=/var/lib/rancher/rke2/agent/logs/kubelet.log --log-file-max-size=50 --logtostderr=false --node-labels=cattle.io/os=linux,rke.cattle.io/machine=1adcc1f7-66f1-4503-b9bc-dfb6e808f27b --pod-infra-container-image=index.docker.io/rancher/pause:3.6 --pod-manifest-path=/var/lib/rancher/rke2/agent/pod-manifests --protect-kernel-defaults=true --read-only-port=0 --resolv-conf=/run/systemd/resolve/resolv.conf --serialize-image-pulls=false --stderrthreshold=FATAL --tls-cert-file=/var/lib/rancher/rke2/agent/serving-kubelet.crt --tls-private-key-file=/var/lib/rancher/rke2/agent/serving-kubelet.key +``` + +### 4.2.10 Ensure that the --rotate-certificates argument is not set to false (Automated) + + +**Result:** pass + +**Remediation:** +If using a Kubelet config file, edit the file to add the line `rotateCertificates` to `true` or +remove it altogether to use the default value. +If using command line arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS +variable. +Based on your system, restart the kubelet service. For example, +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.rotateCertificates}' is present OR '{.rotateCertificates}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.11 Verify that the RotateKubeletServerCertificate argument is set to true (Manual) + + +**Result:** pass + +**Remediation:** +Edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf +on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable. +--feature-gates=RotateKubeletServerCertificate=true +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.featureGates.RotateKubeletServerCertificate}' is present OR '{.featureGates.RotateKubeletServerCertificate}' is not present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.12 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Manual) + + +**Result:** warn + +**Remediation:** +If using a Kubelet config file, edit the file to set `TLSCipherSuites` to +TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +or to a subset of these values. +If using executable arguments, edit the kubelet service file +/etc/systemd/system/kubelet.service.d/10-kubeadm.conf on each worker node and +set the --tls-cipher-suites parameter as follows, or to a subset of these values. +--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256 +Based on your system, restart the kubelet service. For example: +systemctl daemon-reload +systemctl restart kubelet.service + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{range .tlsCipherSuites[:]}{}{','}{end}' is present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +### 4.2.13 Ensure that a limit is set on pod PIDs (Manual) + + +**Result:** warn + +**Remediation:** +Decide on an appropriate level for this parameter and set it, +either via the --pod-max-pids command line parameter or the PodPidsLimit configuration file setting. + +**Audit:** + +```bash +/bin/ps -fC kubelet +``` + +**Audit Config:** + +```bash +/bin/cat /var/lib/rancher/rke2/agent/kubelet.kubeconfig +``` + +**Expected Result**: + +```console +'{.podPidsLimit}' is present +``` + +**Returned Value**: + +```console +apiVersion: v1 clusters: - cluster: server: https://127.0.0.1:6443 certificate-authority: /var/lib/rancher/rke2/agent/server-ca.crt name: local contexts: - context: cluster: local namespace: default user: user name: Default current-context: Default kind: Config preferences: {} users: - name: user user: client-certificate: /var/lib/rancher/rke2/agent/client-kubelet.crt client-key: /var/lib/rancher/rke2/agent/client-kubelet.key +``` + +## 5.1 RBAC and Service Accounts +### 5.1.1 Ensure that the cluster-admin role is only used where required (Manual) + + +**Result:** warn + +**Remediation:** +Identify all clusterrolebindings to the cluster-admin role. Check if they are used and +if they need this role or if they could use a role with fewer privileges. +Where possible, first bind users to a lower privileged role and then remove the +clusterrolebinding to the cluster-admin role : +kubectl delete clusterrolebinding [name] + +### 5.1.2 Minimize access to secrets (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove get, list and watch access to Secret objects in the cluster. + +### 5.1.3 Minimize wildcard use in Roles and ClusterRoles (Manual) + + +**Result:** warn + +**Remediation:** +Where possible replace any use of wildcards in clusterroles and roles with specific +objects or actions. + +### 5.1.4 Minimize access to create pods (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to pod objects in the cluster. + +### 5.1.5 Ensure that default service accounts are not actively used. (Manual) + + +**Result:** warn + +**Remediation:** +Create explicit service accounts wherever a Kubernetes workload requires specific access +to the Kubernetes API server. +Modify the configuration of each default service account to include this value +automountServiceAccountToken: false + +### 5.1.6 Ensure that Service Account Tokens are only mounted where necessary (Manual) + + +**Result:** warn + +**Remediation:** +Modify the definition of pods and service accounts which do not need to mount service +account tokens to disable it. + +### 5.1.7 Avoid use of system:masters group (Manual) + + +**Result:** warn + +**Remediation:** +Remove the system:masters group from all users in the cluster. + +### 5.1.8 Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove the impersonate, bind and escalate rights from subjects. + +### 5.1.9 Minimize access to create persistent volumes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove create access to PersistentVolume objects in the cluster. + +### 5.1.10 Minimize access to the proxy sub-resource of nodes (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the proxy sub-resource of node objects. + +### 5.1.11 Minimize access to the approval sub-resource of certificatesigningrequests objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the approval sub-resource of certificatesigningrequest objects. + +### 5.1.12 Minimize access to webhook configuration objects (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the validatingwebhookconfigurations or mutatingwebhookconfigurations objects + +### 5.1.13 Minimize access to the service account token creation (Manual) + + +**Result:** warn + +**Remediation:** +Where possible, remove access to the token sub-resource of serviceaccount objects. + +## 5.2 Pod Security Standards +### 5.2.1 Ensure that the cluster has at least one active policy control mechanism in place (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that either Pod Security Admission or an external policy control system is in place +for every namespace which contains user workloads. + +### 5.2.2 Minimize the admission of privileged containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of privileged containers. + +### 5.2.3 Minimize the admission of containers wishing to share the host process ID namespace (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostPID` containers. + +### 5.2.4 Minimize the admission of containers wishing to share the host IPC namespace (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostIPC` containers. + +### 5.2.5 Minimize the admission of containers wishing to share the host network namespace (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of `hostNetwork` containers. + +### 5.2.6 Minimize the admission of containers with allowPrivilegeEscalation (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `.spec.allowPrivilegeEscalation` set to `true`. + +### 5.2.7 Minimize the admission of root containers (Manual) + + +**Result:** warn + +**Remediation:** +Create a policy for each namespace in the cluster, ensuring that either `MustRunAsNonRoot` +or `MustRunAs` with the range of UIDs not including 0, is set. + +### 5.2.8 Minimize the admission of containers with the NET_RAW capability (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with the `NET_RAW` capability. + +### 5.2.9 Minimize the admission of containers with added capabilities (Automated) + + +**Result:** warn + +**Remediation:** +Ensure that `allowedCapabilities` is not present in policies for the cluster unless +it is set to an empty array. + +### 5.2.10 Minimize the admission of containers with capabilities assigned (Manual) + + +**Result:** warn + +**Remediation:** +Review the use of capabilites in applications running on your cluster. Where a namespace +contains applicaions which do not require any Linux capabities to operate consider adding +a PSP which forbids the admission of containers which do not drop all capabilities. + +### 5.2.11 Minimize the admission of Windows HostProcess containers (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers that have `.securityContext.windowsOptions.hostProcess` set to `true`. + +### 5.2.12 Minimize the admission of HostPath volumes (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers with `hostPath` volumes. + +### 5.2.13 Minimize the admission of containers which use HostPorts (Manual) + + +**Result:** warn + +**Remediation:** +Add policies to each namespace in the cluster which has user workloads to restrict the +admission of containers which use `hostPort` sections. + +## 5.3 Network Policies and CNI +### 5.3.1 Ensure that the CNI in use supports NetworkPolicies (Manual) + + +**Result:** warn + +**Remediation:** +If the CNI plugin in use does not support network policies, consideration should be given to +making use of a different plugin, or finding an alternate mechanism for restricting traffic +in the Kubernetes cluster. + +### 5.3.2 Ensure that all Namespaces have NetworkPolicies defined (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create NetworkPolicy objects as you need them. + +## 5.4 Secrets Management +### 5.4.1 Prefer using Secrets as files over Secrets as environment variables (Manual) + + +**Result:** warn + +**Remediation:** +If possible, rewrite application code to read Secrets from mounted secret files, rather than +from environment variables. + +### 5.4.2 Consider external secret storage (Manual) + + +**Result:** warn + +**Remediation:** +Refer to the Secrets management options offered by your cloud provider or a third-party +secrets management solution. + +## 5.5 Extensible Admission Control +### 5.5.1 Configure Image Provenance using ImagePolicyWebhook admission controller (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and setup image provenance. + +## 5.7 General Policies +### 5.7.1 Create administrative boundaries between resources using namespaces (Manual) + + +**Result:** warn + +**Remediation:** +Follow the documentation and create namespaces for objects in your deployment as you need +them. + +### 5.7.2 Ensure that the seccomp profile is set to docker/default in your Pod definitions (Manual) + + +**Result:** warn + +**Remediation:** +Use `securityContext` to enable the docker/default seccomp profile in your pod definitions. +An example is as below: + securityContext: + seccompProfile: + type: RuntimeDefault + +### 5.7.3 Apply SecurityContext to your Pods and Containers (Manual) + + +**Result:** warn + +**Remediation:** +Follow the Kubernetes documentation and apply SecurityContexts to your Pods. For a +suggested list of SecurityContexts, you may refer to the CIS Security Benchmark for Docker +Containers. + +### 5.7.4 The default namespace should not be used (Manual) + + +**Result:** warn + +**Remediation:** +Ensure that namespaces are created to allow for appropriate segregation of Kubernetes +resources and that all new resources are created in a specific namespace. + diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md index 5c324f64898..2450938a61e 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25.md @@ -2,13 +2,17 @@ title: RKE2 Self-Assessment Guide - CIS Benchmark v1.7 - K8s v1.25 --- + + + + This document is a companion to the [RKE2 Hardening Guide](../../../../pages-for-subheaders/rke2-hardening-guide.md), which provides prescriptive guidance on how to harden RKE2 clusters that are running in production and managed by Rancher. This benchmark guide helps you evaluate the security of a hardened cluster against each control in the CIS Kubernetes Benchmark. This guide corresponds to the following versions of Rancher, CIS Benchmarks, and Kubernetes: | Rancher Version | CIS Benchmark Version | Kubernetes Version | |-----------------|-----------------------|--------------------| -| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25 | +| Rancher v2.7 | Benchmark v1.7 | Kubernetes v1.25 | This guide walks through the various controls and provide updated example commands to audit compliance in Rancher created clusters. Because Rancher and RKE2 install Kubernetes services as Docker containers, many of the control verification checks in the CIS Kubernetes Benchmark don't apply. These checks will return a result of `Not Applicable`. diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/kubernetes-security-best-practices.md b/versioned_docs/version-2.7/reference-guides/rancher-security/kubernetes-security-best-practices.md index a863dd44e52..ace8bd95fab 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/kubernetes-security-best-practices.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/kubernetes-security-best-practices.md @@ -2,6 +2,10 @@ title: Kubernetes Security Best Practices --- + + + + ### Restricting cloud metadata API access Cloud providers such as AWS, Azure, DigitalOcean or GCP often expose metadata services locally to instances. By default, this endpoint is accessible by pods running on a cloud instance, including pods in hosted Kubernetes providers such as EKS, AKS, DigitalOcean Kubernetes or GKE, and can contain cloud credentials for that node, provisioning data such as kubelet credentials, or other sensitive data. To mitigate this risk when running on a cloud platform, follow the [Kubernetes security recommendations](https://kubernetes.io/docs/tasks/administer-cluster/securing-a-cluster/#restricting-cloud-metadata-api-access): limit permissions given to instance credentials, use network policies to restrict pod access to the metadata API, and avoid using provisioning data to deliver secrets. diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/psa-restricted-exemptions.md b/versioned_docs/version-2.7/reference-guides/rancher-security/psa-restricted-exemptions.md index 2373ec352c4..0f35551cf31 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/psa-restricted-exemptions.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/psa-restricted-exemptions.md @@ -2,6 +2,10 @@ title: Sample PodSecurityConfiguration --- + + + + The following PodSecurityConfiguration contains the required Rancher namespace exemptions for a `rancher-restricted` cluster to run properly. ```yaml diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/security-advisories-and-cves.md b/versioned_docs/version-2.7/reference-guides/rancher-security/security-advisories-and-cves.md index 872a908f633..8f3649e7a85 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/security-advisories-and-cves.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/security-advisories-and-cves.md @@ -2,6 +2,10 @@ title: Security Advisories and CVEs --- + + + + Rancher is committed to informing the community of security issues in our products. Rancher will publish security advisories and CVEs (Common Vulnerabilities and Exposures) for issues we have resolved. New security advisories are also published in Rancher's GitHub [security page](https://github.com/rancher/rancher/security/advisories). | ID | Description | Date | Resolution | diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md b/versioned_docs/version-2.7/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md index d7358c29b62..1d9d46c75d4 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/selinux-rpm/about-rancher-selinux.md @@ -2,6 +2,10 @@ title: About rancher-selinux --- + + + + To allow Rancher to work with SELinux, some functionality has to be manually enabled for the SELinux nodes. To help with that, Rancher provides a SELinux RPM. The `rancher-selinux` RPM only contains policies for the [rancher-logging application.](https://github.com/rancher/charts/tree/dev-v2.5/charts/rancher-logging) diff --git a/versioned_docs/version-2.7/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md b/versioned_docs/version-2.7/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md index fe124221e5f..c5edf5e0017 100644 --- a/versioned_docs/version-2.7/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md +++ b/versioned_docs/version-2.7/reference-guides/rancher-security/selinux-rpm/about-rke2-selinux.md @@ -2,6 +2,10 @@ title: About rke2-selinux --- + + + + `rke2-selinux` provides policies for RKE2. It is installed automatically when the RKE2 installer script detects that it is running on an RPM-based distro. The `rke2-selinux` GitHub repository is [here.](https://github.com/rancher/rke2-selinux) diff --git a/versioned_sidebars/version-2.7-sidebars.json b/versioned_sidebars/version-2.7-sidebars.json index 3c543404682..5625fdaf67d 100644 --- a/versioned_sidebars/version-2.7-sidebars.json +++ b/versioned_sidebars/version-2.7-sidebars.json @@ -1029,8 +1029,8 @@ }, "items": [ "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.23", - "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.23-k8s-v1.24", - "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25" + "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + "reference-guides/rancher-security/hardening-guides/rke1-hardening-guide/rke1-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27" ] }, { @@ -1042,8 +1042,8 @@ }, "items": [ "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.23", - "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.23-k8s-v1.24", - "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25" + "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + "reference-guides/rancher-security/hardening-guides/rke2-hardening-guide/rke2-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27" ] }, { @@ -1055,8 +1055,8 @@ }, "items": [ "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.23", - "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.23-k8s-v1.24", - "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25" + "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.24-k8s-v1.24", + "reference-guides/rancher-security/hardening-guides/k3s-hardening-guide/k3s-self-assessment-guide-with-cis-v1.7-k8s-v1.25-v1.26-v1.27" ] } ]