CVE-2020-20450: Null Pointer Dereference
First published: Tue May 25 2021(Updated: )
FFmpeg 4.2 is affected by null pointer dereference passed as argument to libavformat/aviobuf.c, which could cause a Denial of Service.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/ffmpeg | 7:4.3.7-0+deb11u1 7:4.3.8-0+deb11u1 7:5.1.6-0+deb12u1 7:7.0.2-3 7:7.1-3 | |
| FFmpeg | =4.2 | |
| Debian GNU/Linux | =11.0 |
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Reference Links
- https://trac.ffmpeg.org/ticket/7993
- https://www.debian.org/security/2021/dsa-4998
- https://launchpad.net/bugs/cve/CVE-2020-20450
- https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=5400e4a50c61e53e1bc50b3e77201649bbe9c510
- https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=3865b1952e5cf993b016d83ba78fe1deb63bbfad
- https://security-tracker.debian.org/tracker/CVE-2020-20450
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20450
- https://nvd.nist.gov/vuln/detail/CVE-2020-20450
- https://ubuntu.com/security/CVE-2020-20450
Frequently Asked Questions
What is CVE-2020-20450?
CVE-2020-20450 is a vulnerability in FFmpeg 4.2 that allows for a null pointer dereference, resulting in a potential Denial of Service.
How does CVE-2020-20450 impact FFmpeg?
CVE-2020-20450 affects FFmpeg 4.2 by passing a null pointer dereference as an argument to libavformat/aviobuf.c, which could lead to a Denial of Service.
What software versions are affected by CVE-2020-20450?
FFmpeg 4.2.7-0ubuntu0.1 and earlier versions, as well as FFmpeg 4.1.9-0+deb10u1 to 4.1.11-0+deb10u1, 4.3.6-0+deb11u1, 5.1.3-1, and 6.0-7 are affected by CVE-2020-20450.
How can I fix CVE-2020-20450?
To fix CVE-2020-20450, update FFmpeg to version 4.2.7-0ubuntu0.1 or later, or upgrade to a version that includes the necessary security patches.
Where can I find more information about CVE-2020-20450?
You can find more information about CVE-2020-20450 on the CVE Mitre website (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20450), the FFmpeg Trac ticket (https://trac.ffmpeg.org/ticket/7993), and the FFmpeg Git commit (https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=5400e4a50c61e53e1bc50b3e77201649bbe9c510).
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