--vEao7xgI/oilGqZ+
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200703-14
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/ 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: Asterisk: SIP Denial of Service
      Date: March 16, 2007
      Bugs: #169616
        ID: 200703-14

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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 

--vEao7xgI/oilGqZ+
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iQEVAwUBRfsZ7zvRww8BFPxFAQKINQf+MzBHKBoh93eLt4LssCVaKx4A4Mgvfr2U
wPNhGDh+EjzHCSxdpBIPdljvw2X280FTyoJNvkrtzhd6QGr1i8oqMtJ4PBMmh4Nl
CY5g0U+0sU9IwIt7Aktom2/MvEjh0uxPb/RgP3aWxNJ8WaA8KupExEpzZcfrTk9b
ovMeLWIG0x5azc5JuZltq8ZF/tuzlQMc9SyfFgUyKfuy9V+XRFUrklpYoR/skwv8
4Lf/hrg0jk00UXtbiGVGRHdQZLCMFJEVnRckMVZdCREYXYg4T5jjvT5B2JCyjEoj
34NnlhF3hyjFZ5LzHXzl5+D06+PIi4/lc/rUmpyUASGZ8WXVVVBbAg==cJEq
-----END PGP SIGNATURE-----

--vEao7xgI/oilGqZ+--