DescriptionThe mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.
SourceCVE (at NVD; oss-sec, fulldisc, OSVDB, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, more)
NVD severitymedium (attack range: remote)
Debian Bugs729029
Debian/oldstablenot vulnerable.
Debian/stablenot vulnerable.
Debian/testingnot vulnerable.
Debian/unstablenot vulnerable.

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssh (PTS)squeeze (security), squeeze1:5.5p1-6+squeeze5fixed
wheezy (security)1:6.0p1-4+deb7u1fixed
jessie, sid1:6.7p1-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensshsourcesqueeze(not affected)
opensshsourcewheezy(not affected)


[wheezy] - openssh <not-affected> (AES-GCM support introduced in 6.2)
[squeeze] - openssh <not-affected> (AES-GCM support introduced in 6.2)

Search for package or bug name: Reporting problems