Bug 1126688

Summary:	gcc: memory corruption issues in libstdc++ C++ regex library
Product:	[Other] Security Response	Reporter:	Murray McAllister <mmcallis>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	drieden, jakub, law, lkocman, mfranc, mpolacek, nobody+bgollahe
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:	2015-01-21 16:45:12 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:	1126692
Bug Blocks:	1126694

Description Murray McAllister 2014-08-05 05:37:01 UTC

Maksymilian Arciemowicz reported memory corruption issues in the libstdc++ C++ regex library. If an attacker were able to make an application using this library process a specially-crafted regular expression, it could cause the application to crash or, potentially, execute arbitrary code.

Original report:

http://seclists.org/fulldisclosure/2014/Aug/1

Upstream bug:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61582

Currently on Fedora, this requires compiling the affected program with the experimental ISO C++ 2011 support by using the "-std=c++11" option.

Comment 1 Murray McAllister 2014-08-05 05:39:50 UTC

Created gcc tracking bugs for this issue:

Affects: fedora-all [bug 1126692]

Comment 2 Murray McAllister 2014-08-05 05:51:14 UTC

CVE request: http://www.openwall.com/lists/oss-security/2014/08/05/4

Comment 3 Murray McAllister 2014-08-07 07:55:25 UTC

As pointed out by Rich Felker, this is not a flaw in the "ISO C++ 2011 regex library" specification, but rather a GCC/libstdc++ bug:

http://www.openwall.com/lists/oss-security/2014/08/05/11