CVE-2020-36328

Publication date 31 December 2020

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in libwebp in versions before 1.0.1. A heap-based buffer overflow in function WebPDecodeRGBInto is possible due to an invalid check for buffer size. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libwebp	22.04 LTS jammy	Fixed 0.6.1-2ubuntu1
	21.10 impish	Fixed 0.6.1-2ubuntu1
	21.04 hirsute	Fixed 0.6.1-2ubuntu0.21.04.1
	20.10 groovy	Fixed 0.6.1-2ubuntu0.20.10.1
	20.04 LTS focal	Fixed 0.6.1-2ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 0.6.1-2ubuntu0.18.04.1
	16.04 LTS xenial	Fixed 0.4.4-1ubuntu0.1~esm1
	14.04 LTS trusty	Fixed 0.4.0-4ubuntu0.1~esm1

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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
libwebp	Upstream: https://chromium.googlesource.com/webm/libwebp/+/dad31750e374eff8e02fb467eb562d4bf236ed6e

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	9.8 · Critical
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-4971-1
libwebp vulnerabilities
1 June 2021

USN-4971-2
libwebp vulnerabilities
10 June 2021

Other references

https://www.cve.org/CVERecord?id=CVE-2020-36328