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  Asterisk protection bypass

From:ASTERISK
Date:28.10.2009
Subject:AST-2009-007: ACL not respected on SIP INVITE

              Asterisk Project Security Advisory - AST-2009-007

  +------------------------------------------------------------------------+
  |      Product       | Asterisk                                          |
  |--------------------+---------------------------------------------------|
  |      Summary       | ACL not respected on SIP INVITE                   |
  |--------------------+---------------------------------------------------|
  | Nature of Advisory | Unauthorized calls allowed on prohibited networks |
  |--------------------+---------------------------------------------------|
  |   Susceptibility   | Remote unauthorized session                       |
  |--------------------+---------------------------------------------------|
  |      Severity      | Critical                                          |
  |--------------------+---------------------------------------------------|
  |   Exploits Known   | No                                                |
  |--------------------+---------------------------------------------------|
  |    Reported On     | October 18, 2009                                  |
  |--------------------+---------------------------------------------------|
  |    Reported By     | Thomas Athineou <thom_winkler AT web DOT de>      |
  |--------------------+---------------------------------------------------|
  |     Posted On      | October 26, 2009                                  |
  |--------------------+---------------------------------------------------|
  |  Last Updated On   | October 26, 2009                                  |
  |--------------------+---------------------------------------------------|
  |  Advisory Contact  | Jeff Peeler <jpeeler AT digium DOT com>           |
  |--------------------+---------------------------------------------------|
  |      CVE Name      |                                                   |
  +------------------------------------------------------------------------+

  +------------------------------------------------------------------------+
  | Description | A missing ACL check for handling SIP INVITEs allows a    |
  |             | device to make calls on networks intended to be          |
  |             | prohibited as defined by the "deny" and "permit" lines   |
  |             | in sip.conf. The ACL check for handling SIP              |
  |             | registrations was not affected.                          |
  +------------------------------------------------------------------------+

  +------------------------------------------------------------------------+
  | Resolution | Users should upgrade to a version listed in the           |
  |            | "Corrected In" section below.                             |
  +------------------------------------------------------------------------+

  +------------------------------------------------------------------------+
  |                           Affected Versions                            |
  |------------------------------------------------------------------------|
  |            Product            | Release Series |                       |
  |-------------------------------+----------------+-----------------------|
  |     Asterisk Open Source      |     1.2.x      | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |     Asterisk Open Source      |     1.4.x      | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |     Asterisk Open Source      |     1.6.x      | All 1.6.1 versions    |
  |-------------------------------+----------------+-----------------------|
  |        Asterisk Addons        |     1.2.x      | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |        Asterisk Addons        |     1.4.x      | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |        Asterisk Addons        |     1.6.x      | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |   Asterisk Business Edition   |     A.x.x      | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |   Asterisk Business Edition   |     B.x.x      | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |   Asterisk Business Edition   |     C.x.x      | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |          AsteriskNOW          |      1.5       | Unaffected            |
  |-------------------------------+----------------+-----------------------|
  |  s800i (Asterisk Appliance)   |     1.2.x      | Unaffected            |
  +------------------------------------------------------------------------+

  +------------------------------------------------------------------------+
  |                              Corrected In                              |
  |------------------------------------------------------------------------|
  |                   Product                   |         Release          |
  |---------------------------------------------+--------------------------|
  |         Open Source Asterisk 1.6.1          |         1.6.1.8          |
  +------------------------------------------------------------------------+

 +----------------------------------------------------------------------------+
 |                                  Patches                                   |
 |----------------------------------------------------------------------------|
 |                              SVN URL                               |Version|
 |--------------------------------------------------------------------+-------|
 |http://downloads.digium.com/pub/security/AST-2009-007-1.6.1.diff.txt| 1.6.1 |
 +----------------------------------------------------------------------------+

  +------------------------------------------------------------------------+
  |        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-2009-007.pdf and          |
  | http://downloads.digium.com/pub/security/AST-2009-007.html             |
  +------------------------------------------------------------------------+

  +------------------------------------------------------------------------+
  |                            Revision History                            |
  |------------------------------------------------------------------------|
  |          Date          |      Editor      |       Revisions Made       |
  |------------------------+------------------+----------------------------|
  | October 26, 2009       | Jeff Peeler      | Initial release            |
  +------------------------------------------------------------------------+

              Asterisk Project Security Advisory - AST-2009-007
             Copyright (c) 2009 Digium, Inc. All Rights Reserved.
 Permission is hereby granted to distribute and publish this advisory in its
                          original, unaltered form.

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