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Rancher</a></li></ul></nav></div></div></aside><main class="docMainContainer_gTbr"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">FAQ</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Security FAQ</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: v2.7</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Security FAQ</h1></header><h3 class="anchor anchorWithStickyNavbar_LWe7" id="is-there-a-hardening-guide">Is there a Hardening Guide?<a href="#is-there-a-hardening-guide" class="hash-link" aria-label="Direct link to Is there a Hardening Guide?" title="Direct link to Is there a Hardening Guide?">​</a></h3><p>The Hardening Guide is located in the main <a href="/v2.7/reference-guides/rancher-security">Security</a> section.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="have-hardened-rancher-kubernetes-clusters-been-evaluated-by-the-cis-kubernetes-benchmark-where-can-i-find-the-results">Have hardened Rancher Kubernetes clusters been evaluated by the CIS Kubernetes Benchmark? Where can I find the results?<a href="#have-hardened-rancher-kubernetes-clusters-been-evaluated-by-the-cis-kubernetes-benchmark-where-can-i-find-the-results" class="hash-link" aria-label="Direct link to Have hardened Rancher Kubernetes clusters been evaluated by the CIS Kubernetes Benchmark? Where can I find the results?" title="Direct link to Have hardened Rancher Kubernetes clusters been evaluated by the CIS Kubernetes Benchmark? Where can I find the results?">​</a></h3><p>We have run the CIS Kubernetes benchmark against a hardened Rancher Kubernetes cluster. The results of that assessment can be found in the main <a href="/v2.7/reference-guides/rancher-security">Security</a> section.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="how-does-rancher-verify-communication-with-downstream-clusters-and-what-are-some-associated-security-concerns">How does Rancher verify communication with downstream clusters, and what are some associated security concerns?<a href="#how-does-rancher-verify-communication-with-downstream-clusters-and-what-are-some-associated-security-concerns" class="hash-link" aria-label="Direct link to How does Rancher verify communication with downstream clusters, and what are some associated security concerns?" title="Direct link to How does Rancher verify communication with downstream clusters, and what are some associated security concerns?">​</a></h3><p>Communication between the Rancher server and downstream clusters is performed through agents. Rancher uses either a registered certificate authority (CA) bundle or the local trust store to verify communication between Rancher agents and the Rancher server. Using a CA bundle for verification is more strict, as only the certificates based on that bundle are trusted. If TLS verification for a explicit CA bundle fails, Rancher may fall back to using the local trust store for verifying future communication. Any CA within the local trust store can then be used to generate a valid certificate.</p><p>As described in <a href="https://www.suse.com/c/rancher-security-update/" target="_blank" rel="noopener noreferrer">Rancher Security Update CVE-2024-22030</a>, under a narrow set of circumstances, malicious actors can take over Rancher nodes by exploiting the behavior of Rancher CAs. For the attack to succeed, the malicious actor must generate a valid certificate from either a valid CA in the targeted Rancher server, or from a valid registered CA. The attacker also needs to either hijack or spoof the Rancher server-url as a preliminary step. Rancher is currently evaluating Rancher CA behavior to mitigate against this and any similar avenues of attack.</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/rancher/rancher-docs/edit/main/versioned_docs/version-2.7/faq/security.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"><span class="theme-last-updated">Last updated<!-- --> on <b><time datetime="2024-05-01T17:10:23.000Z">May 1, 2024</time></b></span></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/v2.7/faq/technical-items"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Technical FAQ</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/v2.7/faq/telemetry"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Telemetry FAQ</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#is-there-a-hardening-guide" class="table-of-contents__link toc-highlight">Is there a Hardening Guide?</a></li><li><a href="#have-hardened-rancher-kubernetes-clusters-been-evaluated-by-the-cis-kubernetes-benchmark-where-can-i-find-the-results" class="table-of-contents__link toc-highlight">Have hardened Rancher Kubernetes clusters been evaluated by the CIS Kubernetes Benchmark? Where can I find the results?</a></li><li><a href="#how-does-rancher-verify-communication-with-downstream-clusters-and-what-are-some-associated-security-concerns" class="table-of-contents__link toc-highlight">How does Rancher verify communication with downstream clusters, and what are some associated security concerns?</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2024 SUSE Rancher. All Rights Reserved.</div></div></div></footer></div>
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