Bugzilla Bug 202733

Asterisk Project Security Advisory - AST-2007-027

   +------------------------------------------------------------------------+
   |      Product       | Asterisk                                          |
   |--------------------+---------------------------------------------------|
   |      Summary       | Database matching order permits host-based        |
   |                    | authentication to be ignored                      |
   |--------------------+---------------------------------------------------|
   | Nature of Advisory | Logic error                                       |
   |--------------------+---------------------------------------------------|
   |   Susceptibility   | Remote Unauthenticated Sessions                   |
   |--------------------+---------------------------------------------------|
   |      Severity      | Moderate                                          |
   |--------------------+---------------------------------------------------|
   |   Exploits Known   | No                                                |
   |--------------------+---------------------------------------------------|
   |    Reported On     | October 30, 2007                                  |
   |--------------------+---------------------------------------------------|
   |    Reported By     | Tilghman Lesher <tlesher AT digium DOT com>       |
   |--------------------+---------------------------------------------------|
   |     Posted On      | December 18, 2007                                 |
   |--------------------+---------------------------------------------------|
   |  Last Updated On   | December 18, 2007                                 |
   |--------------------+---------------------------------------------------|
   |  Advisory Contact  | Tilghman Lesher <tlesher AT digium DOT com>       |
   |--------------------+---------------------------------------------------|
   |      CVE Name      | CVE-2007-6430                                     |
   +------------------------------------------------------------------------+

   +------------------------------------------------------------------------+
   | Description | Due to the way database-based registrations ("realtime") |
   |             | are processed, IP addresses are not checked when the     |
   |             | username is correct and there is no password. An         |
   |             | attacker may impersonate any user using host-based       |
   |             | authentication without a secret, simply by guessing the  |
   |             | username of that user. This is limited in scope to       |
   |             | administrators who have set up the registration database |
   |             | ("realtime") for authentication and are using only       |
   |             | host-based authentication, not passwords. However, both  |
   |             | the SIP and IAX protocols are affected.                  |
   +------------------------------------------------------------------------+

   +------------------------------------------------------------------------+
   | Resolution | As a workaround, administrators may set a password for    |
   |            | all users and peers in their registration "realtime"      |
   |            | database. A fix is included in the newest release of      |
   |            | Asterisk, as provided below.                              |
   +------------------------------------------------------------------------+

   +------------------------------------------------------------------------+
   |                           Affected Versions                            |
   |------------------------------------------------------------------------|
   |          Product           |   Release   |                             |
   |                            |   Series    |                             |
   |----------------------------+-------------+-----------------------------|
   |    Asterisk Open Source    |    1.0.x    | Not affected                |
   |----------------------------+-------------+-----------------------------|
   |    Asterisk Open Source    |    1.2.x    | All versions prior to       |
   |                            |             | 1.2.26                      |
   |----------------------------+-------------+-----------------------------|
   |    Asterisk Open Source    |    1.4.x    | All versions prior to       |
   |                            |             | 1.4.16                      |
   |----------------------------+-------------+-----------------------------|
   | Asterisk Business Edition  |    A.x.x    | Not affected                |
   |----------------------------+-------------+-----------------------------|
   | Asterisk Business Edition  |    B.x.x    | All versions prior to       |
   |                            |             | B.2.3.6                     |
   |----------------------------+-------------+-----------------------------|
   | Asterisk Business Edition  |    C.x.x    | All versions prior to       |
   |                            |             | C.1.0-beta8                 |
   |----------------------------+-------------+-----------------------------|
   |        AsteriskNOW         | pre-release | Not affected                |
   |----------------------------+-------------+-----------------------------|
   |     Asterisk Appliance     |    0.x.x    | Not affected                |
   |       Developer Kit        |             |                             |
   |----------------------------+-------------+-----------------------------|
   | s800i (Asterisk Appliance) |    1.0.x    | Not affected                |
   +------------------------------------------------------------------------+

   +------------------------------------------------------------------------+
   |                              Corrected In                              |
   |------------------------------------------------------------------------|
   |                  Product                  |          Release           |
   |-------------------------------------------+----------------------------|
   |           Asterisk Open Source            |           1.2.26           |
   |-------------------------------------------+----------------------------|
   |           Asterisk Open Source            |           1.4.16           |
   |-------------------------------------------+----------------------------|
   |         Asterisk Business Edition         |          B.2.3.6           |
   |-------------------------------------------+----------------------------|
   |         Asterisk Business Edition         |        C.1.0-beta8         |
   |-------------------------------------------+----------------------------|
   +------------------------------------------------------------------------+

   +------------------------------------------------------------------------+
   |        Links        |                                                  |
   +------------------------------------------------------------------------+

   +------------------------------------------------------------------------+
   | Asterisk Project Security Advisories are posted at                     |
   | http://www.asterisk.org/security                                       |
   |                                                                        |
   | This document may be superseded by later versions; if so, the latest   |
   | version will be posted at                                              |
   | http://downloads.digium.com/pub/security/AST-2007-027.pdf and          |
   | http://downloads.digium.com/pub/security/AST-2007-027.html             |
   +------------------------------------------------------------------------+

   +------------------------------------------------------------------------+
   |                            Revision History                            |
   |------------------------------------------------------------------------|
   |      Date       |         Editor         |       Revisions Made        |
   |-----------------+------------------------+-----------------------------|
   | 2007-12-18      | Tilghman Lesher        | Initial Release             |
   +------------------------------------------------------------------------+

               Asterisk Project Security Advisory - AST-2007-027
              Copyright (c) 2007 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in its
                           original, unaltered form.

From: The Asterisk Development Team <asteriskteam@digium.com>
To: undisclosed-recipients:  ;
Date: Tue, 18 Dec 2007 13:50:10 -0600
Subject: [asterisk-announce] Asterisk 1.4.16 and 1.2.26 released

The Asterisk.org development team has released Asterisk versions 1.4.16 and
1.2.26.  Both releases contain a fix for a security vulnerability.  The 1.4.16
release also contains a number of other bug fixes made over the past few weeks.

The details of the security issue have been published in a security advisory:

http://downloads.digium.com/pub/security/AST-2007-027.pdf

The issue affects users of the dynamic realtime configuration method for IAX2
or SIP that use host based authentication.  Systems that do not use host based
authentication with realtime are not affected.

A full list of changes is available in the ChangeLog, which is distributed with
the release and is also available on the downloads page.

http://downloads.digium.com/pub/telephony/asterisk/ChangeLog-1.4.16

The releases are available for immediate download from
http://downloads.digium.com/.

Thank you for your support!

voip please bump.

How we can pitch in on this:
http://bugs.gentoo.org/show_bug.cgi?id=212306

net-misc/asterisk-1.2.27 in cvs.
target keywords are amd64 sparc x86.

stabling on bug 213883.

Two YES on bug 213883.

GLSA 200804-13