Bug 772125 (CVE-2011-3922)

Summary:	CVE-2011-3922 qt: Stack-based buffer overflow in embedded harfbuzz code
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:	itamar, jreznik, jrusnack, kevin, ltinkl, rdieter, rnovacek, smparrish, than
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:	2012-06-20 14:50:03 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:	772128, 805433
Bug Blocks:	784298

Description Huzaifa S. Sidhpurwala 2012-01-06 04:55:19 UTC

A stack-based buffer overflow was found in the way harfbuzz rendered certain Tibetian font glyphs. This flaw affects qt4, which embeds the vulnerable version of harfbuzz. A remote attacker could use this flaw to crash an application (capable of loading remote web content) linked against qt.

Reference:
http://googlechromereleases.blogspot.com/2012/01/stable-channel-update.html
http://code.google.com/p/chromium/issues/detail?id=108006

Patch:
http://src.chromium.org/viewvc/chrome/branches/963/src/third_party/harfbuzz/src/harfbuzz-myanmar.c?r1=116201&r2=116200&pathrev=116201

Comment 1 Huzaifa S. Sidhpurwala 2012-01-06 05:00:48 UTC

Statement:

This issue does not affect the version of qt as shipped with Red Hat Enterprise Linux 4 and 5. This issue does not affect the version of qt3 as shipped with Red Hat Enterprise Linux 6. This issue does not affect the version of qt4 as shipped with Red Hat Enterprise Linux 5. This issue affects the version of qt as shipped with Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this issue as having moderate security impact. A future update may address this issue.

This issue does not affect the version of pango as shipped with Red Hat Enterprise Linux 4, 5 and 6.

Comment 2 Huzaifa S. Sidhpurwala 2012-01-06 05:02:09 UTC

Created qt tracking bugs for this issue

Affects: fedora-all [bug 772128]

Comment 5 errata-xmlrpc 2012-06-20 07:21:16 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:0880 https://rhn.redhat.com/errata/RHSA-2012-0880.html