Bug 722939 (CVE-2011-2943)

Summary:	CVE-2011-2943 pidgin: Crash in IRC protocol plug-in by listing set of users (/who command) upon session startup
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ddumas, mbarnes, mjc, security-response-team
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:	2015-08-22 15:12:46 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:	732410
Bug Blocks:	722946

Description Jan Lieskovsky 2011-07-18 14:39:49 UTC

A NULL pointer dereference flaw was found in the way IRC protocol plug-in of the Pidgin multiprotocol instant messaging client processed certain nick names, when list set of users (/who command) was issued upon user session startup and connecting user has had certain encoding configuration setup. A remote attacker could use a specially-crafted string as their nickname to cause the Pidgin client on the side of the victim (connecting user) to crash.

Upstream bug report:
[1] http://developer.pidgin.im/ticket/14341

Acknowledgements:

Red Hat would like to thank the Pidgin project for reporting this issue.

Comment 1 Jan Lieskovsky 2011-07-18 14:41:38 UTC

This issue did NOT affect the versions of the pidgin package, as shipped with
Red Hat Enterprise Linux 4, 5, or 6.

--

This issue affects the versions of the pidgin package, as shipped with Fedora release of 14 and 15.

Comment 6 Jan Lieskovsky 2011-07-18 14:55:35 UTC

Statement:

Not vulnerable. This issue did not affect the versions of pidgin as
shipped with Red Hat Enterprise Linux 4, 5, or 6 as they contained a version of pidgin that did not support /who IRC protocol command.

Comment 8 Huzaifa S. Sidhpurwala 2011-08-22 10:55:54 UTC

Created pidgin tracking bugs for this issue

Affects: fedora-all [bug 732410]

Comment 9 Tomas Hoger 2011-08-24 06:37:10 UTC

http://www.pidgin.im/news/security/?id=53
http://developer.pidgin.im/viewmtn/revision/info/5c2dba4a7e2e76b76e7f472b88953a4316706d43