| Name | CVE-2020-21688 |
| Description | A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3010-1, DSA-4998-1, DSA-5126-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ffmpeg (PTS) | stretch (security) | 7:3.2.18-0+deb9u1 | fixed |
| stretch (lts), stretch | 7:3.2.19-0+deb9u5 | fixed |
| buster, buster (lts) | 7:4.1.11-0+deb10u2 | fixed |
| buster (security) | 7:4.1.11-0+deb10u1 | fixed |
| bullseye | 7:4.3.7-0+deb11u1 | fixed |
| bullseye (security) | 7:4.3.8-0+deb11u1 | fixed |
| bookworm (security), bookworm | 7:5.1.6-0+deb12u1 | fixed |
| sid, trixie | 7:7.1-3 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://trac.ffmpeg.org/ticket/8186
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=22c3cd176079dd104ec7610ead697235b04396f1 (4.4)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=f7c9b1ed56b98eede5756d6865a10305982b4570 (4.1.9)
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=f1a77222da98dbe4b8eeda54d68deefe6adcd299 (3.2.17)