Multiple vulnerabilities in FFmpeg

Published: 2021-06-03 | Updated: 2023-12-27

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-33815 CVE-2021-38171
CWE-ID	CWE-129 CWE-252
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 information about 2 vulnerabilities.

1) Improper validation of array index

EUVDB-ID: #VU84800

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33815

CWE-ID: CWE-129 - Improper Validation of Array Index

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to an out-of-bounds array access within the dwa_uncompress() function in libavcodec/exr.c. A remote attacker can trick the victim to open a specially crafted image, trigger memory corruption and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FFmpeg: 4.0 - 4.4.4

External links

http://github.com/FFmpeg/FFmpeg/commit/26d3c81bc5ef2f8c3f09d45eaeacfb4b1139a777
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.

2) Unchecked return value

EUVDB-ID: #VU84801