Bug 1086514 (CVE-2013-7353)

Summary:	CVE-2013-7353 libpng: integer overflow leading to a heap-based buffer overflow in png_set_unknown_chunks()
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	drizt72, erik-fedora, fedora-mingw, jkoncick, jkurik, ktietz, lfarkas, paul, pfrields, phracek, rdieter, rjones
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:	2014-04-21 09:03:58 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:	1086669, 1086670, 1086671, 1086672, 1086673, 1086674
Bug Blocks:	1086521

Description Huzaifa S. Sidhpurwala 2014-04-11 03:53:57 UTC

An integer overflow leading to a heap-based buffer overflow was found in the png_set_unknown_chunks() API function of libpng. A attacker could create a specially-crafated image file and render it with an application written to explicitly call png_set_unknown_chunks() function, could cause libpng to crash or execute arbitrary code with the permissions of the user running such an application.

The vendor mentions that internal calls use safe values. These issues could potentially affect applications that use the libpng API. Apparently no such applications were identified.

Reference:

http://sourceforge.net/p/libpng/bugs/199/
http://seclists.org/oss-sec/2014/q2/83

Comment 1 Huzaifa S. Sidhpurwala 2014-04-11 09:15:24 UTC

This issue was addressed by the following upstream commit:

http://sourceforge.net/p/libpng/code/ci/9dd2bfafe50de0e3204be81a90303760d26a697c

and was later enhanced by the following commit:

http://sourceforge.net/p/libpng/code/ci/2414bd99d8c76f92ca9272f1b1b1eff55709298a

Upstream released libpng-1.6.0 and libpng-1.5.14 to address this issue.

Comment 2 Huzaifa S. Sidhpurwala 2014-04-11 09:32:53 UTC

In libpng-1.5.14 the following commits were used by upstream to address this flaw:

http://sourceforge.net/p/libpng/code/ci/1a3d6e3cf3082a0da998dbf402d384a589488859
http://sourceforge.net/p/libpng/code/ci/77a817bfc298a221e3e623acf73c2a1e726c4ec6
http://sourceforge.net/p/libpng/code/ci/bec9ca9b8aa0cf16d2cde1757379afbe9adbe7d9

Comment 3 Huzaifa S. Sidhpurwala 2014-04-11 09:47:28 UTC

Created libpng tracking bugs for this issue:

Affects: fedora-19 [bug 1086669]

Comment 4 Huzaifa S. Sidhpurwala 2014-04-11 09:47:33 UTC

Created libpng10 tracking bugs for this issue:

Affects: epel-6 [bug 1086673]

Comment 5 Huzaifa S. Sidhpurwala 2014-04-11 09:47:37 UTC

Created libpng15 tracking bugs for this issue:

Affects: fedora-20 [bug 1086670]

Comment 6 Huzaifa S. Sidhpurwala 2014-04-11 09:47:42 UTC

Created mingw-libpng tracking bugs for this issue:

Affects: fedora-19 [bug 1086671]

Comment 7 Huzaifa S. Sidhpurwala 2014-04-11 09:47:46 UTC

Created mingw32-libpng tracking bugs for this issue:

Affects: epel-5 [bug 1086672]
Affects: epel-6 [bug 1086674]

Comment 8 Huzaifa S. Sidhpurwala 2014-04-21 07:54:24 UTC

Statement:

Not vulnerable. This issue does not affect the version of libpng as shipped with Red Hat Enterprise Linux 5 and 6.