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

[Raphael Marichez <falco () gentoo org>]

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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 () gentoo 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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