CVE-2020-20902

NameCVE-2020-20902
DescriptionA CWE-125: Out-of-bounds read vulnerability exists in long_term_filter function in g729postfilter.c in FFmpeg 4.2.1 during computation of the denominator of pseudo-normalized correlation R'(0), that could result in disclosure of information.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-3010-1, DSA-4722-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ffmpeg (PTS)stretch7:3.2.14-1~deb9u1vulnerable
stretch (security)7:3.2.18-0+deb9u1fixed
buster7:4.1.8-0+deb10u1fixed
buster (security)7:4.1.9-0+deb10u1fixed
bullseye7:4.3.3-0+deb11u1fixed
bullseye (security)7:4.3.4-0+deb11u1fixed
bookworm7:4.4.2-1fixed
sid7:5.0.1-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ffmpegsourcestretch7:3.2.18-0+deb9u1DLA-3010-1
ffmpegsourcebuster7:4.1.6-1~deb10u1DSA-4722-1
ffmpegsource(unstable)7:4.2.2-1

Notes

https://trac.ffmpeg.org/ticket/8176
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=5f0acc5064ed501cb40d4aaccae2b3ce5c4552fd (4.3)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=2c78a76cb0443f8a12a5eadc3b58373aa2f4ab22 (4.3)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=b97aaf791f6ea3506a6252ecef6a1a0e9a542e04 (4.2.2)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=81672bf00f3b5a3c025034f4b2e33d67b72f3839 (4.2.2)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=a0c91fb0f0641f9f35f650281a176657907097cf (4.1.5)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=abf9627f70ed8467b1646d56205e61f965f11468 (4.1.9)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=1cff89a11fa051696109565b3bf88c94479374eb (3.2.15)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=abf9627f70ed8467b1646d56205e61f965f11468 (3.2.17)

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