CVE-2020-20896

NameCVE-2020-20896
DescriptionAn issue was discovered in function latm_write_packet in libavformat/latmenc.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts due to a Null pointer dereference.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5126-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ffmpeg (PTS)stretch (security)7:3.2.18-0+deb9u1fixed
stretch (lts), stretch7:3.2.19-0+deb9u4fixed
buster7:4.1.9-0+deb10u1fixed
buster (security)7:4.1.11-0+deb10u1fixed
bullseye7:4.3.6-0+deb11u1fixed
bullseye (security)7:4.3.7-0+deb11u1fixed
bookworm (security), bookworm7:5.1.5-0+deb12u1fixed
trixie7:6.1.1-4fixed
sid7:6.1.1-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ffmpegsourcestretch(not affected)
ffmpegsourcebuster7:4.1.9-0+deb10u1DSA-5126-1
ffmpegsource(unstable)7:4.3-2

Notes

[stretch] - ffmpeg <not-affected> (Vulnerable code introduced later)
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/dd01947397b98e94c3f2a79d5820aaf4594f4d3b (4.3)
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/6fe33489be72eee8010c28165f4b12870df4c600 (4.1.9)
https://trac.ffmpeg.org/ticket/8273
Introduced in: https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/8b3ec51de8a04f4442297f2f835e925cab7b0597 (3.4)

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