CVE-2020-21697: Use After Free
First published: Tue Aug 10 2021(Updated: )
A heap-use-after-free in the mpeg_mux_write_packet function in libavformat/mpegenc.c of FFmpeg 4.2 allows to cause a denial of service (DOS) via a crafted avi file.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FFmpeg FFmpeg | =4.2 | |
| Debian Debian Linux | =11.0 | |
| debian/ffmpeg | 7:4.3.7-0+deb11u1 7:5.1.6-0+deb12u1 7:7.0.2-3 |
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Reference Links
- https://trac.ffmpeg.org/ticket/8188
- https://www.debian.org/security/2021/dsa-4998
- https://launchpad.net/bugs/cve/CVE-2020-21697
- http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=cfce16449cb815132f829d5a07beb138dfb2cba6
- http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=010281ed230454042abf8b88696678c669a0f279
- https://security-tracker.debian.org/tracker/CVE-2020-21697
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21697
- https://nvd.nist.gov/vuln/detail/CVE-2020-21697
- https://ubuntu.com/security/CVE-2020-21697
Frequently Asked Questions
What is CVE-2020-21697?
CVE-2020-21697 is a vulnerability in FFmpeg 4.2 that allows a denial of service (DOS) through a crafted avi file.
How does CVE-2020-21697 affect the affected software?
CVE-2020-21697 affects the FFmpeg packages in various versions of Ubuntu and Debian.
How can I fix CVE-2020-21697?
To fix CVE-2020-21697, update the FFmpeg packages to the recommended versions provided by Ubuntu or Debian.
Where can I find more information about CVE-2020-21697?
You can find more information about CVE-2020-21697 on the MITRE CVE website, FFmpeg trac ticket, and Ubuntu security notices.
What CWE category does CVE-2020-21697 belong to?
CVE-2020-21697 belongs to CWE category 416 - Use After Free.
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