CVE-2007-2243

NameCVE-2007-2243
DescriptionOpenSSH 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs436571

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssh (PTS)bullseye (security), bullseye1:8.4p1-5+deb11u3vulnerable
bookworm, bookworm (security)1:9.2p1-2+deb12u3vulnerable
sid, trixie1:9.9p1-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensshsource(unstable)(unfixed)unimportant436571

Notes

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

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