Use After Free Affecting ffmpeg package, versions <7:4.2.7-0ubuntu0.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.72% (75th percentile)

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  • Snyk IDSNYK-UBUNTU2004-FFMPEG-1540048
  • published11 Aug 2021
  • disclosed10 Aug 2021

Introduced: 10 Aug 2021

CVE-2020-21688  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 ffmpeg to version 7:4.2.7-0ubuntu0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ffmpeg package and not the ffmpeg package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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 Base Scores

version 3.1