{ "document": { "aggregate_severity": { "text": "Critical" }, "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/ubuntu20.04els/vex/2023/cve-2023-38408-els_os-ubuntu20_04els.json" } ], "tracking": { "current_release_date": "2026-04-17T15:14:11Z", "generator": { "date": "2026-04-17T15:14:11Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2023-38408-ELS_OS-UBUNTU20.04ELS", "initial_release_date": "2023-07-20T03:15:00Z", "revision_history": [ { "date": "2023-07-20T03:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-04-17T15:14:11Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2023-38408" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Ubuntu 20.04", "product": { "name": "Ubuntu 20.04", "product_id": "Ubuntu-20", "product_identification_helper": { "cpe": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*" } } } ], "category": "product_family", "name": "Ubuntu" } ], "category": "vendor", "name": "Canonical Ltd." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "product": { "name": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "product_id": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "product_identification_helper": { "purl": "pkg:deb/tuxcare/ssh@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=all" } } } ], "category": "architecture", "name": "all" }, { "branches": [ { "category": "product_version", "name": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/openssh-server@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/ssh-askpass-gnome@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/openssh-tests@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/openssh-sftp-server@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/openssh-client@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } } ], "category": "architecture", "name": "amd64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all" }, "product_reference": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" } ] }, "vulnerabilities": [ { "cve": "CVE-2023-38408", "cwe": { "id": "CWE-428", "name": "Unquoted Search Path or Element" }, "notes": [ { "category": "description", "text": "The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an incomplete fix for CVE-2016-10009.", "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" } ], "product_status": { "under_investigation": [ "Ubuntu-20:openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "Ubuntu-20:ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2023-38408" }, { "category": "external", "summary": "http://packetstormsecurity.com/files/173661/OpenSSH-Forwarded-SSH-Agent-Remote-Code-Execution.html", "url": "http://packetstormsecurity.com/files/173661/OpenSSH-Forwarded-SSH-Agent-Remote-Code-Execution.html" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2023/07/20/1", "url": "http://www.openwall.com/lists/oss-security/2023/07/20/1" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2023/07/20/2", "url": "http://www.openwall.com/lists/oss-security/2023/07/20/2" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2023/09/22/11", "url": "http://www.openwall.com/lists/oss-security/2023/09/22/11" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2023/09/22/9", "url": "http://www.openwall.com/lists/oss-security/2023/09/22/9" }, { "category": "external", "summary": "https://blog.qualys.com/vulnerabilities-threat-research/2023/07/19/cve-2023-38408-remote-code-execution-in-opensshs-forwarded-ssh-agent", "url": "https://blog.qualys.com/vulnerabilities-threat-research/2023/07/19/cve-2023-38408-remote-code-execution-in-opensshs-forwarded-ssh-agent" }, { "category": "external", "summary": "https://github.com/openbsd/src/commit/7bc29a9d5cd697290aa056e94ecee6253d3425f8", "url": "https://github.com/openbsd/src/commit/7bc29a9d5cd697290aa056e94ecee6253d3425f8" }, { "category": "external", "summary": "https://github.com/openbsd/src/commit/f03a4faa55c4ce0818324701dadbf91988d7351d", "url": "https://github.com/openbsd/src/commit/f03a4faa55c4ce0818324701dadbf91988d7351d" }, { "category": "external", "summary": "https://github.com/openbsd/src/commit/f8f5a6b003981bb824329dc987d101977beda7ca", "url": "https://github.com/openbsd/src/commit/f8f5a6b003981bb824329dc987d101977beda7ca" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2023/08/msg00021.html", "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00021.html" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEBTJJINE2I3FHAUKKNQWMFGYMLSMWKQ/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEBTJJINE2I3FHAUKKNQWMFGYMLSMWKQ/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RAXVQS6ZYTULFAK3TEJHRLKZALJS3AOU/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RAXVQS6ZYTULFAK3TEJHRLKZALJS3AOU/" }, { "category": "external", "summary": "https://news.ycombinator.com/item?id=36790196", "url": "https://news.ycombinator.com/item?id=36790196" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202307-01", "url": "https://security.gentoo.org/glsa/202307-01" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20230803-0010/", "url": "https://security.netapp.com/advisory/ntap-20230803-0010/" }, { "category": "external", "summary": "https://support.apple.com/kb/HT213940", "url": "https://support.apple.com/kb/HT213940" }, { "category": "external", "summary": "https://www.openssh.com/security.html", "url": "https://www.openssh.com/security.html" }, { "category": "external", "summary": "https://www.openssh.com/txt/release-9.3p2", "url": "https://www.openssh.com/txt/release-9.3p2" }, { "category": "external", "summary": "https://www.qualys.com/2023/07/19/cve-2023-38408/rce-openssh-forwarded-ssh-agent.txt", "url": "https://www.qualys.com/2023/07/19/cve-2023-38408/rce-openssh-forwarded-ssh-agent.txt" }, { "category": "external", "summary": "https://www.vicarius.io/vsociety/posts/exploring-opensshs-agent-forwarding-rce-cve-2023-38408", "url": "https://www.vicarius.io/vsociety/posts/exploring-opensshs-agent-forwarding-rce-cve-2023-38408" } ], "release_date": "2023-07-20T03:15:00Z", "remediations": [ { "category": "none_available", "details": "Affected", "product_ids": [ "Ubuntu-20:openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "Ubuntu-20:ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "Ubuntu-20:openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "Ubuntu-20:ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" ] } ], "threats": [ { "category": "impact", "details": "Critical" } ] } ] }