CVE-2023-38408

Description

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.

References

https://news.ycombinator.com/item?id=36790196

https://blog.qualys.com/vulnerabilities-threat-research/2023/07/19/cve-2023-38408-remote-code-execution-in-opensshs-forwarded-ssh-agent

https://www.qualys.com/2023/07/19/cve-2023-38408/rce-openssh-forwarded-ssh-agent.txt

https://github.com/openbsd/src/commit/f8f5a6b003981bb824329dc987d101977beda7ca

https://github.com/openbsd/src/commit/7bc29a9d5cd697290aa056e94ecee6253d3425f8

https://github.com/openbsd/src/commit/f03a4faa55c4ce0818324701dadbf91988d7351d

https://www.openssh.com/txt/release-9.3p2

https://www.openssh.com/security.html

https://security.gentoo.org/glsa/202307-01 (GLSA-202307-01) vendor-advisory

http://www.openwall.com/lists/oss-security/2023/07/20/1 ([oss-security] 20230719 Re: CVE-2023-38408: Remote Code Execution in OpenSSH's forwarded ssh-agent) mailing-list

http://www.openwall.com/lists/oss-security/2023/07/20/2 ([oss-security] 20230720 Re: Announce: OpenSSH 9.3p2 released) mailing-list

http://packetstormsecurity.com/files/173661/OpenSSH-Forwarded-SSH-Agent-Remote-Code-Execution.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RAXVQS6ZYTULFAK3TEJHRLKZALJS3AOU/ (FEDORA-2023-878e04f4ae) vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEBTJJINE2I3FHAUKKNQWMFGYMLSMWKQ/ (FEDORA-2023-79a18e1725) vendor-advisory

https://security.netapp.com/advisory/ntap-20230803-0010/

https://lists.debian.org/debian-lts-announce/2023/08/msg00021.html ([debian-lts-announce] 20230817 [SECURITY] [DLA 3532-1] openssh security update) mailing-list

http://www.openwall.com/lists/oss-security/2023/09/22/9 ([oss-security] 20230922 Re: illumos (or at least danmcd) membership in the distros list) mailing-list

http://www.openwall.com/lists/oss-security/2023/09/22/11 ([oss-security] 20230922 Re: illumos (or at least danmcd) membership in the distros list) mailing-list

https://support.apple.com/kb/HT213940

https://www.vicarius.io/vsociety/posts/exploring-opensshs-agent-forwarding-rce-cve-2023-38408

cve.org CVE-2023-38408

nvd.nist.gov CVE-2023-38408

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