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Gentoo Linux Security Advisory                           GLSA 200703-14
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                                            https://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
        
Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/200703-14

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
https://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.

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