Asterisk Project Security Advisory – AST-2014-003

Product Asterisk
Summary Remote Crash Vulnerability in PJSIP channel driver
Nature of Advisory Denial of Service
Susceptibility Remote Unauthenticated Sessions
Severity Moderate
Exploits Known No
Reported On January 29, 2014
Reported By Joshua Colp
Posted On March 10, 2014
Last Updated On March 10, 2014
Advisory Contact Joshua Colp
CVE Name CVE-2014-2288

Description A remotely exploitable crash vulnerability exists in the
PJSIP channel driver if the “qualify_frequency”
configuration option is enabled on an AOR and the remote
SIP server challenges for authentication of the resulting
OPTIONS request. The response handling code wrongly assumes
that a PJSIP endpoint will always be associated with an
outgoing request which is incorrect.

Resolution This patch adds a check when handling responses challenging
for authentication. If no endpoint is associated with the
request no retry with authentication will occur.

Affected Versions
Product Release Series
Asterisk Open Source 12.x All

Corrected In
Product Release
Asterisk Open Source 12.x 12.1.1

Patches
SVN URL Revision
http://downloads.asterisk.org/pub/security/AST-2014-003-12.diff Asterisk
12

Links https://issues.asterisk.org/jira/browse/ASTERISK-23210

Asterisk Project Security Advisories are posted at
http://www.asterisk.org/security

This document may be superseded by later versions; if so, the latest
version will be posted at
http://downloads.digium.com/pub/security/AST-2014-003.pdf and
http://downloads.digium.com/pub/security/AST-2014-003.html

Revision History
Date Editor Revisions Made
03/05/14 Joshua Colp Document Creation

Asterisk Project Security Advisory – AST-2014-003
Copyright (c) 2014 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.