CVE-2007-2243

Name	CVE-2007-2243
Description	OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	436571

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	1:10.0p1-8	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
openssh	source	(unstable)	(unfixed)	unimportant		436571

[etch] - openssh <no-dsa> (Minor issue)
[sarge] - openssh <no-dsa> (Minor issue)