Bug 461599 (CVE-2008-3964)

Summary:	CVE-2008-3964 libpng: off-by-one error in png_push_read_zTXt()
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	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:	2008-09-10 07:33:01 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	461620
Bug Blocks:

Description Tomas Hoger 2008-09-09 11:47:09 UTC

libpng upstream version 1.2.32beta01 fixes an insufficient memory allocation flaw in the "png_push_read_zTXt()" function in pngpread.c, that results in a write of once null byte past the end of allocated buffer.

References:
http://sourceforge.net/project/shownotes.php?release_id=624518
http://www.openwall.com/lists/oss-security/2008/09/09/3

Upstream bug report:
http://sourceforge.net/tracker/index.php?func=detail&aid=2095669&group_id=5624&atid=105624

As noted in the upstream bug report, this issue was introduced upstream in libpng-1.2.30beta04 and currently only affect 1.2.31 as available in Fedora Rawhide.  Versions of libpng as shipped in Red Hat Enterprise Linux 2.1, 3, 4 and 5 are not affected by this flaw.

Comment 3 Tomas Hoger 2008-09-10 07:33:01 UTC

Fixed now in Fedora Rawhide, no other affected product -> closing.