{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/oraclelinux6els/vex/2026/cve-2026-43617-els_os-oraclelinux6els.json" } ], "tracking": { "current_release_date": "2026-05-22T18:26:03Z", "generator": { "date": "2026-05-22T18:26:03Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-43617-ELS_OS-ORACLELINUX6ELS", "initial_release_date": "2026-05-20T02:16:00Z", "revision_history": [ { "date": "2026-05-20T02:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-05-22T16:06:15Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-05-22T18:26:03Z", "number": "3", "summary": "Update document" } ], "status": "final", "version": "3" }, "title": "Security update on CVE-2026-43617" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Oracle Linux 6", "product": { "name": "Oracle Linux 6", "product_id": "Oracle-Linux-6", "product_identification_helper": { "cpe": "cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Oracle Linux" } ], "category": "vendor", "name": "Oracle Corporation" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64", "product": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64", "product_id": "rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/rsync@3.0.6-12.el6.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64", "product": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64", "product_id": "rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/rsync@3.0.6-12.el6.tuxcare.els2?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64", "product": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64", "product_id": "rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/rsync@3.0.6-12.el6.tuxcare.els3?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64", "product": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64", "product_id": "rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/rsync@3.0.6-12.el6.tuxcare.els5?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64", "product": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64", "product_id": "rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/rsync@3.0.6-12.el6.tuxcare.els6?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64", "product": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64", "product_id": "rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/rsync@3.0.6-12.el6.tuxcare.els4?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64", "product": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64", "product_id": "rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/rsync@3.0.6-12.el6.tuxcare.els7?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64" }, "product_reference": "rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64" }, "product_reference": "rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64" }, "product_reference": "rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64" }, "product_reference": "rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64" }, "product_reference": "rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64" }, "product_reference": "rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64" }, "product_reference": "rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64", "relates_to_product_reference": "Oracle-Linux-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-43617", "cwe": { "id": "CWE-289", "name": "Authentication Bypass by Alternate Name" }, "notes": [ { "category": "description", "text": "Rsync version 3.4.2 and prior contain an authorization bypass vulnerability in the rsync daemon's hostname-based access control list enforcement when configured with chroot. Attackers can bypass hostname-based deny rules by controlling the PTR record for their source IP address, allowing connections from hostnames that administrators intended to deny when reverse DNS resolution fails and defaults to UNKNOWN.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-43617" }, { "category": "external", "summary": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3", "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3" }, { "category": "external", "summary": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-rjfm-3w2m-jf4f", "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-rjfm-3w2m-jf4f" }, { "category": "external", "summary": "https://www.vulncheck.com/advisories/rsync-authorization-bypass-via-hostname-resolution", "url": "https://www.vulncheck.com/advisories/rsync-authorization-bypass-via-hostname-resolution" } ], "release_date": "2026-05-20T02:16:00Z", "scores": [ { "cvss_v3": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1" }, "products": [ "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" }, { "category": "impact", "date": "2026-05-22T18:12:39.120864Z", "details": "This vulnerability only applies when rsync is run as a standalone daemon with chroot and hostname-based hosts allow/deny rules; rsync used over SSH or configurations that restrict by IP/netblock are not affected. Exploitation requires the attacker to control reverse DNS (PTR) for their source IP or tamper with the server’s DNS resolution—a high‑complexity prerequisite—and it does not bypass per‑module authentication, so access remains limited by existing credentials and module permissions. Systems that do not deliberately expose the rsync daemon on port 873 and do not rely on hostname patterns for access control are therefore outside the vulnerable path, making this a low‑priority issue in managed enterprise VM/server contexts.", "product_ids": [ "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64", "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64" ] } ] } ] }