| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3532-1 |
| Debian Bugs | 1042460 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openssh (PTS) | buster | 1:7.9p1-10+deb10u2 | vulnerable |
| buster (security) | 1:7.9p1-10+deb10u3 | fixed |
| bullseye | 1:8.4p1-5+deb11u1 | vulnerable |
| bookworm | 1:9.2p1-2 | vulnerable |
| sid, trixie | 1:9.4p1-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - openssh <no-dsa> (Minor issue; needs specific conditions and forwarding was always subject to caution warning)
[bullseye] - openssh <no-dsa> (Minor issue; needs specific conditions and forwarding was always subject to caution warning)
https://www.openwall.com/lists/oss-security/2023/07/19/9
https://github.com/openssh/openssh-portable/commit/892506b13654301f69f9545f48213fc210e5c5cc
https://github.com/openssh/openssh-portable/commit/1f2731f5d7a8f8a8385c6031667ed29072c0d92a
https://github.com/openssh/openssh-portable/commit/29ef8a04866ca14688d5b7fed7b8b9deab851f77
https://github.com/openssh/openssh-portable/commit/099cdf59ce1e72f55d421c8445bf6321b3004755
Exploitation requires the presence of specific libraries on the victim system.
Remote exploitation requires that the agent was forwarded to an attacker-controlled
system.