A new security update has been released for Gentoo Linux - Asterisk: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200804-13
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http://security.gentoo.org/
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Severity: Normal
Title: Asterisk: Multiple vulnerabilities
Date: April 14, 2008
Bugs: #200792, #202733, #213883
ID: 200804-13

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Synopsis
========

Multiple vulnerabilities have been found in Asterisk allowing for SQL
injection, session hijacking and unauthorized usage.

Background
==========

Asterisk is an open source telephony engine and tool kit.

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

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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/asterisk < 1.2.27 >= 1.2.27

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

Asterisk upstream developers reported multiple vulnerabilities:

* The Call Detail Record Postgres logging engine (cdr_pgsql) does not
correctly escape the ANI and DNIS arguments before using them in SQL
statements (CVE-2007-6170).

* When using database-based registrations ("realtime") and host-based
authentication, Asterisk does not check the IP address when the
username is correct and there is no password provided
(CVE-2007-6430).

* The SIP channel driver does not correctly determine if
authentication is required (CVE-2008-1332).

Impact
======

Remote authenticated attackers could send specially crafted data to
Asterisk to execute arbitrary SQL commands and compromise the
administrative database. Remote unauthenticated attackers could bypass
authentication using a valid username to hijack other user's sessions,
and establish sessions on the SIP channel without authentication.

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-1.2.27"

References
==========

[ 1 ] CVE-2007-6170
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6170
[ 2 ] CVE-2007-6430
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6430
[ 3 ] CVE-2008-1332
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1332

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

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

http://security.gentoo.org/glsa/glsa-200804-13.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 2008 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