CVE-2025-61984

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)
References	DLA-4584-1
Debian Bugs	1117529

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openssh (PTS)	bookworm	1:9.2p1-2+deb12u10	fixed
	bookworm (security)	1:9.2p1-2+deb12u9	fixed
	trixie	1:10.0p1-7+deb13u4	fixed
	trixie (security)	1:10.0p1-7+deb13u2	fixed
	forky, sid	1:10.5p1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
openssh	source	bullseye	1:8.4p1-5+deb11u7	DLA-4584-1
openssh	source	bookworm	1:9.2p1-2+deb12u8
openssh	source	trixie	1:10.0p1-7+deb13u1
openssh	source	(unstable)	1:10.1p1-1		1117529

Notes

https://www.openwall.com/lists/oss-security/2025/10/06/1
https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984
https://github.com/openssh/openssh-portable/commit/35d5917652106aede47621bb3f64044604164043 (V_10_1_P1)