Denial of service in FFmpeg

Published: 2021-08-12 | Updated: 2023-12-27

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-38291
CWE-ID	CWE-617
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	FFmpeg Universal components / Libraries / Libraries used by multiple products
Vendor	ffmpeg.sourceforge.net

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Reachable Assertion

EUVDB-ID: #VU84802

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38291

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion in src/libavutil/mathematics.c. A remote attacker can trick the victim to open a specially crafted file and crash the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FFmpeg: 4.0 - 4.1.6

External links

http://trac.ffmpeg.org/ticket/9312
http://www.debian.org/security/2021/dsa-4990
http://www.debian.org/security/2021/dsa-4998
http://lists.debian.org/debian-lts-announce/2021/11/msg00012.html
http://security.gentoo.org/glsa/202312-14

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.