bugtraq - [ GLSA 200703-14 ] Asterisk: SIP Denial of Service

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Message-ID: <20070316222759.GD14065@falco.falcal.net>
Date: Fri, 16 Mar 2007 23:27:59 +0100
From: Raphael Marichez <falco@...too.org>
To: gentoo-announce@...too.org
Cc: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200703-14 ] Asterisk: SIP Denial of Service

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Gentoo Linux Security Advisory                           GLSA 200703-14
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Asterisk: SIP Denial of Service
      Date: March 16, 2007
      Bugs: #169616
        ID: 200703-14

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Synopsis
========

Asterisk is vulnerable to Denial of Service in the SIP channel.

Background
==========

Asterisk is an open source implementation of a telephone private branch
exchange (PBX).

Affected packages
=================

    -------------------------------------------------------------------
     Package            /   Vulnerable   /                  Unaffected
    -------------------------------------------------------------------
  1  net-misc/asterisk      < 1.2.14-r1                   >= 1.2.14-r1
                                                         *>= 1.0.12-r1

Description
===========

The MU Security Research Team discovered that Asterisk contains a
NULL-pointer dereferencing error in the SIP channel when handling
request messages.

Impact
======

A remote attacker could cause an Asterisk server listening for SIP
messages to crash by sending a specially crafted SIP request message.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Asterisk users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose net-misc/asterisk

Note: Asterisk 1.0.x is no longer supported upstream so users should
consider upgrading to Asterisk 1.2.x.

References
==========

  [ 1 ] CVE-2007-1306
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1306
  [ 2 ] MU-200703-01
        http://labs.musecurity.com/advisories/MU-200703-01.txt

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200703-14.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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