#VU70605 Division by zero in FFmpeg - CVE-2020-20892

Vulnerability identifier: #VU70605

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-20892

CWE-ID: CWE-369

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 perform a denial of service attack.

The vulnerability exists due to a division by zero error within the filter_frame() function in libavfilter/vf_lenscorrection.c in FFmpeg. A remote attacker can pass specially crafted data to the application and crash it.

Mitigation
Install update from vendor's website.

Vulnerable software versions

FFmpeg: before 4.2.2

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External links
https://git.videolan.org/?p=ffmpeg.git;a=commit;h=19587c9332f5be4f6bc6d7b2b8ef3fd21dfeaa01
https://trac.ffmpeg.org/ticket/8265

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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.