CVE-2011-2692

Publication date 17 July 2011

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
chromium-browser	12.04 LTS precise	Not affected
	11.10 oneiric	Fixed 14.0.835.202~r103287-0ubuntu1
	11.04 natty	Fixed 14.0.835.202~r103287-0ubuntu0.11.04.1
	10.10 maverick	Fixed 14.0.835.202~r103287-0ubuntu0.10.10.1
	10.04 LTS lucid	Fixed 14.0.835.202~r103287-0ubuntu0.10.04.2
	8.04 LTS hardy	Not in release
firefox	12.04 LTS precise	Fixed 8.0~b4+build1-0ubuntu2
	11.10 oneiric	Fixed 8.0+build1-0ubuntu0.11.10.1
	11.04 natty	Fixed 8.0+build1-0ubuntu0.11.04.1
	10.10 maverick	Ignored end of life
	10.04 LTS lucid	Fixed 10.0+build1-0ubuntu0.10.04.2
	8.04 LTS hardy	Ignored end of life
libpng	12.04 LTS precise	Not affected
	11.10 oneiric	Not affected
	11.04 natty	Fixed 1.2.44-1ubuntu3.1
	10.10 maverick	Fixed 1.2.44-1ubuntu0.1
	10.04 LTS lucid	Fixed 1.2.42-1ubuntu2.2
	8.04 LTS hardy	Fixed 1.2.15~beta5-3ubuntu0.4

Notes

jdstrand

firefox 3.6.23 has 1.2.35 and 7.0.1 has 1.4.7

micahg

firefox 8 will have 1.4.8

Patch details

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

Package	Patch details
libpng	Upstream: http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng;a=commit;h=61a2d8a2a7b03023e63eae9a3e64607aaaa6d339

Severity score breakdown

Parameter	Value
Base score	8.8 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H