[ASA-202007-4] ffmpeg: arbitrary code execution
Morten Linderud
foxboron at archlinux.org
Fri Jul 31 20:02:42 UTC 2020
Arch Linux Security Advisory ASA-202007-4
=========================================
Severity: High
Date : 2020-07-31
CVE-ID : CVE-2020-13904
Package : ffmpeg
Type : arbitrary code execution
Remote : Yes
Link : https://security.archlinux.org/AVG-1180
Summary
=======
The package ffmpeg before version 2:4.3.1-1 is vulnerable to arbitrary
code execution.
Resolution
==========
Upgrade to 2:4.3.1-1.
# pacman -Syu "ffmpeg>=2:4.3.1-1"
The problem has been fixed upstream in version 4.3.1.
Workaround
==========
None.
Description
===========
A use-after-free via a crafted EXTINF duration in an m3u8 file has been
found in ffmpeg <= 4.2.3, because parse_playlist in libavformat/hls.c
frees a pointer, and later that pointer is accessed in
av_probe_input_format3 in libavformat/format.c
Impact
======
An attacker can execute arbitrary code on the affected host via crafted
multimedia content.
References
==========
https://trac.ffmpeg.org/ticket/8673
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200529033905.41926-1-lq@chinaffmpeg.org/
https://security.archlinux.org/CVE-2020-13904
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