CVE-2020-21041: Buffer Overflow
First published: Mon May 24 2021(Updated: )
Buffer Overflow vulnerability exists in FFmpeg 4.1 via apng_do_inverse_blend in libavcodec/pngenc.c, which could let a remote malicious user cause a Denial of Service
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FFmpeg FFmpeg | =4.1 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| 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 |
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Reference Links
- https://trac.ffmpeg.org/ticket/7989
- https://lists.debian.org/debian-lts-announce/2021/08/msg00018.html
- https://www.debian.org/security/2021/dsa-4990
- https://launchpad.net/bugs/cve/CVE-2020-21041
- https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=5d9f44da460f781a1604d537d0555b78e29438ba
- https://security-tracker.debian.org/tracker/CVE-2020-21041
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21041
- https://nvd.nist.gov/vuln/detail/CVE-2020-21041
- https://ubuntu.com/security/CVE-2020-21041
Frequently Asked Questions
What is the vulnerability ID of this buffer overflow vulnerability?
The vulnerability ID of this buffer overflow vulnerability is CVE-2020-21041.
In which version of FFmpeg does this vulnerability exist?
This vulnerability exists in FFmpeg version 4.1.
What is the root cause of this vulnerability?
The root cause of this vulnerability is a buffer overflow in the apng_do_inverse_blend function in libavcodec/pngenc.c.
What can a remote malicious user do with this vulnerability?
A remote malicious user can exploit this vulnerability to cause a Denial of Service (DoS) attack.
Are there any remedies available for this vulnerability?
Yes, there are remedies available for this vulnerability. Please refer to the provided references for more information.
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