Bug 765776 (AST-2011-014, CVE-2011-4598)

Summary:	CVE-2011-4598 asterisk: NULL pointer dereference (crash) when processing INFO automon message with no channel (AST-2011-014)
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	djorm, itamar, jeff, rbryant
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:	2013-03-11 03:12:32 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:	765778, 765779
Bug Blocks:

Description Jan Lieskovsky 2011-12-09 11:53:33 UTC

A NULL pointer dereference flaw was found in the way Asterisk handled INFO requests, when the 'automon' feature was enabled. If no channel had been created yet, a remote attacker could use this flaw to cause a denial of service (asterisk crash) by sending an INFO request.

References:
[1] http://www.asterisk.org/node/51693
[2] http://downloads.asterisk.org/pub/security/AST-2011-014.pdf
[4] https://bugs.gentoo.org/show_bug.cgi?id=394095

Upstream patch (for 1.8 branch):
[5] http://svnview.digium.com/svn/asterisk?view=revision&sortby=date&revision=347533

Comment 1 Jan Lieskovsky 2011-12-09 12:01:53 UTC

This issue affects the versions of the asterisk package, as shipped with Fedora release of 15 and 16. Please schedule an update.

--

This issue affects the version of the asterisk package, as shipped with Fedora EPEL 6. Please schedule an update.

Comment 2 Jan Lieskovsky 2011-12-09 12:02:50 UTC

CVE Request:
http://www.openwall.com/lists/oss-security/2011/12/09/3

Comment 3 Jan Lieskovsky 2011-12-09 12:04:47 UTC

Created asterisk tracking bugs for this issue

Affects: fedora-all [bug 765778]
Affects: epel-6 [bug 765779]

Comment 4 Vincent Danen 2011-12-09 18:05:59 UTC

This was assigned the name CVE-2011-4598.

Comment 5 Fedora Update System 2012-03-31 03:10:07 UTC

asterisk-1.8.10.1-1.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.