| Name | CVE-2025-61984 |
| Description | ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.) |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1117529 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openssh (PTS) | bullseye | 1:8.4p1-5+deb11u3 | vulnerable |
| bullseye (security) | 1:8.4p1-5+deb11u5 | vulnerable |
| bookworm | 1:9.2p1-2+deb12u7 | vulnerable |
| bookworm (security) | 1:9.2p1-2+deb12u5 | vulnerable |
| trixie | 1:10.0p1-7 | vulnerable |
| forky, sid | 1:10.2p1-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| openssh | source | (unstable) | 1:10.1p1-1 | | | 1117529 |
Notes
[trixie] - openssh <no-dsa> (Minor issue)
[bookworm] - openssh <no-dsa> (Minor issue)
[bullseye] - openssh <postponed> (Minor issue; can be fixed in next update)
https://www.openwall.com/lists/oss-security/2025/10/06/1
https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984