Remote code execution in FFmpeg

Published: 2021-01-04 | Updated: 2021-05-26

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-35964 CVE-2020-35965
CWE-ID	CWE-787
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	FFmpeg Universal components / Libraries / Libraries used by multiple products
Vendor	ffmpeg.sourceforge.net

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated 22.02.2021

Added fixed version.

Updated: 26.05.2021

Added vulnerability #2.

1) Out-of-bounds write

EUVDB-ID: #VU49222

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-35964

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the track_header() function in libavformat/vividas.c. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Vulnerable software versions

FFmpeg: 4.3.1

CPE2.3

cpe:2.3:a:ffmpeg_sourceforge_net:ffmpeg:4.3.1:*:*:*:*:*:*:*

External links

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26622
https://github.com/FFmpeg/FFmpeg/commit/27a99e2c7d450fef15594671eef4465c8a166bd7

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds write

EUVDB-ID: #VU53601