DescriptionThe smka_decode_frame function in libavcodec/smacker.c in FFmpeg before 2.6.5, 2.7.x before 2.7.3, and 2.8.x through 2.8.2 does not verify that the data size is consistent with the number of channels, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted Smacker data.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: remote)
Debian Bugs806519

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ffmpeg (PTS)stretch7:3.2.5-1fixed
stretch (security)7:3.2.7-1~deb9u1fixed
buster, sid7:3.3.4-1fixed
libav (PTS)wheezy6:0.8.17-2vulnerable
wheezy (security)6:0.8.20-0+deb7u1vulnerable
jessie (security), jessie6:11.9-1~deb8u1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[squeeze] - ffmpeg <end-of-life> (Not supported in Squeeze LTS);a=commit;h=4a9af07a49295e014b059c1ab624c40345af5892
fix for the libav 11.9 branch:;a=commit;h=v11.9-5-g88762a0
fix for the libav 0.8 branch:;a=commit;h=9fba59f471725e5235d5378e795ebf8b59472817

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