CVE-2018-20330

Publication date 21 December 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The tjLoadImage function in libjpeg-turbo 2.0.1 has an integer overflow with a resultant heap-based buffer overflow via a BMP image because multiplication of pitch and height is mishandled, as demonstrated by tjbench.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libjpeg-turbo	19.10 eoan	Fixed 2.0.2-0ubuntu1
	19.04 disco	Fixed 2.0.1-0ubuntu2.2
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

introduced by: https://github.com/libjpeg-turbo/libjpeg-turbo/commit/aa7459050d7a50e1d8a99488902d41fbc118a50f

Patch details

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

Package	Patch details
libjpeg-turbo	Upstream: 3d9c64e

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.8 · High

Base metrics

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

Scores

Parameter	Value
Base score	8.8 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-4190-1
libjpeg-turbo vulnerabilities
13 November 2019

Other references

https://www.cve.org/CVERecord?id=CVE-2018-20330