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/[email protected]/
https://security.archlinux.org/CVE-2020-13904