CVE-2020-21697 — MEDIUM (6.5)

Vulnerability Description

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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Ffmpeg	Ffmpeg	4.2
Debian	Debian Linux	11.0

Related Weaknesses (CWE)

CWE-416

References

https://trac.ffmpeg.org/ticket/8188ExploitIssue TrackingPatch
https://www.debian.org/security/2021/dsa-4998Third Party Advisory
https://trac.ffmpeg.org/ticket/8188ExploitIssue TrackingPatch
https://www.debian.org/security/2021/dsa-4998Third Party Advisory

FAQ

What is CVE-2020-21697?

CVE-2020-21697 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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.

How severe is CVE-2020-21697?

CVE-2020-21697 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-21697?

Check the references section above for vendor advisories and patch information. Affected products include: Ffmpeg Ffmpeg, Debian Debian Linux.