[ASA-202103-7] ffmpeg: arbitrary code execution

[Morten Linderud]

Arch Linux Security Advisory ASA-202103-7
=========================================

Severity: Medium
Date    : 2021-03-13
CVE-ID  : CVE-2020-35964
Package : ffmpeg
Type    : arbitrary code execution
Remote  : No
Link    : https://security.archlinux.org/AVG-1649

Summary
=======

The package ffmpeg before version 2:4.3.2-1 is vulnerable to arbitrary
code execution.

Resolution
==========

Upgrade to 2:4.3.2-1.

# pacman -Syu "ffmpeg>=2:4.3.2-1"

The problem has been fixed upstream in version 4.3.2.

Workaround
==========

None.

Description
===========

track_header in libavformat/vividas.c in FFmpeg 4.3.1 has an out-of-
bounds write because of incorrect extradata packing. The issue is fixed
in FFmpeg version 4.3.2.

Impact
======

An attacker might be able to execute arbitrary code via a crafted media
file.

References
==========

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26622
https://github.com/FFmpeg/FFmpeg/commit/4f0bdff292391cdb96b79b08c56533029166bdc8
https://security.archlinux.org/CVE-2020-35964
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