CVE-2020-20445

Publication date 25 May 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/lpc.h, which allows a remote malicious user to cause a Denial of Service.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ffmpeg	22.04 LTS jammy	Not affected
	21.10 impish	Fixed 7:4.4.2-0ubuntu0.21.10.1
	21.04 hirsute	Ignored end of life, was needed
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Fixed 7:4.2.7-0ubuntu0.1
	18.04 LTS bionic	Fixed 7:3.4.11-0ubuntu0.1
	16.04 LTS xenial	Fixed 7:2.8.17-0ubuntu0.1+esm1
	14.04 LTS trusty	Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
ffmpeg	Upstream: 38d18fb

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H