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Ubuntu Security Notice USN-6430-1
October 12, 2023

ffmpeg vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 20.04 LTS (Available with Ubuntu Pro)
• Ubuntu 18.04 LTS (Available with Ubuntu Pro)
• Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in FFmpeg.

Software Description:

• ffmpeg: Tools for transcoding, streaming and playing of multimedia files

Details:

It was discovered that FFmpeg did not properly handle certain inputs in
vf_lagfun.c, resulting in a buffer overflow vulnerability. An attacker
could possibly use this issue to cause a denial of service via application
crash. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-22024)

It was discovered that FFmpeg incorrectly managed memory in avienc.c,
resulting in a memory leak. An attacker could possibly use this issue
to cause a denial of service via application crash. (CVE-2020-22039)

It was discovered that FFmpeg incorrectly handled certain files due to a
memory leak in frame.c. An attacker could possibly use this issue to cause
a denial of service via application crash. This issue affected
Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-22040)

It was discovered that FFmpeg incorrectly handled certain files due to a
memory leak in fifo.c. An attacker could possibly use this issue to cause
a denial of service via application crash. (CVE-2020-22043)

It was discovered that FFmpeg incorrectly handled certain files due to a
memory leak in vf_tile.c. If a user or automated system were tricked into
processing a specially crafted MOV file, an attacker could possibly use
this issue to cause a denial of service. (CVE-2020-22051)

It was discovered that FFmpeg incorrectly handled certain MOV files in
timecode.c, leading to an integer overflow. An attacker could possibly
use this issue to cause a denial of service using a crafted MOV file.
This issue only affected Ubuntu 16.04 LTS. (CVE-2021-28429)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS (Available with Ubuntu Pro):
ffmpeg 7:4.2.7-0ubuntu0.1+esm2
libavcodec-extra 7:4.2.7-0ubuntu0.1+esm2
libavcodec-extra58 7:4.2.7-0ubuntu0.1+esm2
libavcodec58 7:4.2.7-0ubuntu0.1+esm2
libavdevice58 7:4.2.7-0ubuntu0.1+esm2
libavfilter-extra 7:4.2.7-0ubuntu0.1+esm2
libavfilter-extra7 7:4.2.7-0ubuntu0.1+esm2
libavfilter7 7:4.2.7-0ubuntu0.1+esm2
libavformat58 7:4.2.7-0ubuntu0.1+esm2
libavresample4 7:4.2.7-0ubuntu0.1+esm2
libavutil56 7:4.2.7-0ubuntu0.1+esm2
libpostproc55 7:4.2.7-0ubuntu0.1+esm2
libswresample3 7:4.2.7-0ubuntu0.1+esm2
libswscale5 7:4.2.7-0ubuntu0.1+esm2

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
ffmpeg 7:3.4.11-0ubuntu0.1+esm2
libavcodec-extra 7:3.4.11-0ubuntu0.1+esm2
libavcodec-extra57 7:3.4.11-0ubuntu0.1+esm2
libavcodec57 7:3.4.11-0ubuntu0.1+esm2
libavdevice57 7:3.4.11-0ubuntu0.1+esm2
libavfilter-extra 7:3.4.11-0ubuntu0.1+esm2
libavfilter-extra6 7:3.4.11-0ubuntu0.1+esm2
libavfilter6 7:3.4.11-0ubuntu0.1+esm2
libavformat57 7:3.4.11-0ubuntu0.1+esm2
libavresample3 7:3.4.11-0ubuntu0.1+esm2
libavutil55 7:3.4.11-0ubuntu0.1+esm2
libpostproc54 7:3.4.11-0ubuntu0.1+esm2
libswresample2 7:3.4.11-0ubuntu0.1+esm2
libswscale4 7:3.4.11-0ubuntu0.1+esm2

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
ffmpeg 7:2.8.17-0ubuntu0.1+esm6
libav-tools 7:2.8.17-0ubuntu0.1+esm6
libavcodec-extra 7:2.8.17-0ubuntu0.1+esm6
libavcodec-ffmpeg-extra56 7:2.8.17-0ubuntu0.1+esm6
libavcodec-ffmpeg56 7:2.8.17-0ubuntu0.1+esm6
libavdevice-ffmpeg56 7:2.8.17-0ubuntu0.1+esm6
libavfilter-ffmpeg5 7:2.8.17-0ubuntu0.1+esm6
libavformat-ffmpeg56 7:2.8.17-0ubuntu0.1+esm6
libavresample-ffmpeg2 7:2.8.17-0ubuntu0.1+esm6
libavutil-ffmpeg54 7:2.8.17-0ubuntu0.1+esm6
libpostproc-ffmpeg53 7:2.8.17-0ubuntu0.1+esm6
libswresample-ffmpeg1 7:2.8.17-0ubuntu0.1+esm6
libswscale-ffmpeg3 7:2.8.17-0ubuntu0.1+esm6

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6430-1
CVE-2020-22024, CVE-2020-22039, CVE-2020-22040, CVE-2020-22043,
CVE-2020-22051, CVE-2021-28429