Bug 832625 (CVE-2012-3553)

Summary:	CVE-2012-3553 asterisk: skinny channel driver remote crash vulnerability
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	itamar, jeff, lmadsen, rbryant
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	impact=moderate,public=20120614,reported=20120615,source=full-disclosure,cvss2=3.5/AV:N/AC:M/Au:S/C:N/I:N/A:P,fedora-17/asterisk=affected,epel-6/asterisk=notaffected
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
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Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---
Bug Depends On:	832626
Bug Blocks:

Description Vincent Danen 2012-06-15 21:16:29 EDT

AST-2012-008 previously dealt with a denial of service attack exploitable in the Skinny channel driver that occurred when certain messages are sent after a previously registered station sends an Off Hook message. Unresolved in that patch is an issue in the Asterisk 10 releases, wherein, if a Station Key Pad Button Message is processed after an Off Hook message, the channel driver will inappropriately dereference a Null pointer.

Similar to AST-2012-008, a remote attacker with a valid SCCP ID can can use this vulnerability by closing a connection to the Asterisk server when a station is in the "Off Hook" call state and crash the server.

This only affects version 10, and is fixed in 10.5.1.

References:

http://downloads.digium.com/pub/security/AST-2012-009.html
https://issues.asterisk.org/jira/browse/ASTERISK-19905
http://downloads.asterisk.org/pub/security/AST-2012-009-10.diff

Comment 1 Vincent Danen 2012-06-15 21:18:05 EDT

Created asterisk tracking bugs for this issue

Affects: fedora-17 [bug 832626]

Comment 2 Fedora Update System 2012-06-25 20:39:00 EDT

asterisk-10.5.1-1.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.