Bug 720612 (CVE-2011-2692)

Summary:	CVE-2011-2692 libpng: Invalid read when handling empty sCAL chunks
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bnater, mjc, tgl
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-07-18 09:00:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	721302, 721303, 721304, 721305, 721306, 721307, 721308, 721309, 721310, 721311, 721312, 802166
Bug Blocks:	717086

Description Huzaifa S. Sidhpurwala 2011-07-12 09:22:48 UTC

It was found that libpng read uninitialized memory when it encountered a
sCAL chunk that is empty, and improperly handles a sCAL chunk that lacks
the terminating zero between the two strings that it conveys.

This was fixed in libpng-1.5.4, libpng-1.4.8, libpng-1.2.45,
and libpng-1.0.55.

Patch:
http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng;a=commitdiff;h=61a2d8a2a7b03023e63eae9a3e64607aaaa6d339

Comment 1 Huzaifa S. Sidhpurwala 2011-07-13 04:42:49 UTC

This has been assigned CVE-2011-2692

Comment 2 Vincent Danen 2011-07-13 17:33:53 UTC

This is also CERT VU#819894:

http://www.kb.cert.org/vuls/id/819894

Comment 5 Huzaifa S. Sidhpurwala 2011-07-14 09:08:37 UTC

Created libpng tracking bugs for this issue

Affects: fedora-all [bug 721307]

Comment 6 Huzaifa S. Sidhpurwala 2011-07-14 09:08:41 UTC

Created libpng10 tracking bugs for this issue

Affects: fedora-all [bug 721309]
Affects: epel-6 [bug 721310]

Comment 7 Huzaifa S. Sidhpurwala 2011-07-14 09:08:45 UTC

Created mingw32-libpng tracking bugs for this issue

Affects: epel-5 [bug 721312]
Affects: fedora-all [bug 721311]

Comment 10 errata-xmlrpc 2011-07-28 18:11:56 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:1104 https://rhn.redhat.com/errata/RHSA-2011-1104.html

Comment 11 errata-xmlrpc 2011-07-28 18:12:12 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 4

Via RHSA-2011:1103 https://rhn.redhat.com/errata/RHSA-2011-1103.html

Comment 12 errata-xmlrpc 2011-07-28 18:22:57 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:1105 https://rhn.redhat.com/errata/RHSA-2011-1105.html