CVE-2015-6563

Name	CVE-2015-6563
Description	The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.
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-1500-1
Debian Bugs	795711

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	fixed
	buster (security)	1:7.9p1-10+deb10u4	fixed
	bullseye (security), bullseye	1:8.4p1-5+deb11u3	fixed
	bookworm, bookworm (security)	1:9.2p1-2+deb12u2	fixed
	trixie	1:9.6p1-4	fixed
	sid	1:9.7p1-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
openssh	source	jessie	1:6.7p1-5+deb8u6		DLA-1500-1
openssh	source	(unstable)	1:6.9p1-1			795711

Notes

[wheezy] - openssh <no-dsa> (Minor issue)
[squeeze] - openssh <no-dsa> (Minor issue)
https://anongit.mindrot.org/openssh.git/commit/?id=d4697fe9a28dab7255c60433e4dd23cf7fce8a8b
https://www.openwall.com/lists/oss-security/2015/08/11/9