CVE-2020-21688 — HIGH (8.8)

Vulnerability Description

A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.

CVSS Score

8.8

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

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/8186ExploitIssue TrackingPatch
https://www.debian.org/security/2021/dsa-4998Third Party Advisory
https://trac.ffmpeg.org/ticket/8186ExploitIssue TrackingPatch
https://www.debian.org/security/2021/dsa-4998Third Party Advisory

FAQ

What is CVE-2020-21688?

CVE-2020-21688 is a vulnerability with a CVSS score of 8.8 (HIGH). A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.

How severe is CVE-2020-21688?

CVE-2020-21688 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-21688?

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