#VU29634 Heap-based buffer overflow in FFmpeg - CVE-2019-17542

Vulnerability identifier: #VU29634

Vulnerability 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-2019-17542

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FFmpeg
Universal components / Libraries / Libraries used by multiple products

Vendor: ffmpeg.sourceforge.net

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the vqa_decode_chunk because of an out-of-array access in vqa_decode_init in libavcodec/vqavideo.c. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

FFmpeg: 4.0 - 4.1.6

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External links
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15919
https://github.com/FFmpeg/FFmpeg/commit/02f909dc24b1f05cfbba75077c7707b905e63cd2
https://lists.debian.org/debian-lts-announce/2019/12/msg00003.html
https://security.gentoo.org/glsa/202003-65
https://www.debian.org/security/2020/dsa-4722

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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.