Asterisk Project Security Advisory - ASA-2007-016
+------------------------------------------------------------------------+
| Product | Asterisk |
|--------------------+---------------------------------------------------|
| Summary | Remote crash vulnerability in Skinny channel |
| | driver |
|--------------------+---------------------------------------------------|
| Nature of Advisory | Denial of Service |
|--------------------+---------------------------------------------------|
| Susceptibility | Remote Unauthenticated Sessions |
|--------------------+---------------------------------------------------|
| Severity | Critical |
|--------------------+---------------------------------------------------|
| Exploits Known | No |
|--------------------+---------------------------------------------------|
| Reported On | July 13, 2007 |
|--------------------+---------------------------------------------------|
| Reported By | Will Drewry, Google Security Team |
|--------------------+---------------------------------------------------|
| Posted On | July 17, 2007 |
|--------------------+---------------------------------------------------|
| Last Updated On | July 17, 2007 |
|--------------------+---------------------------------------------------|
| Advisory Contact | Jason Parker <jparker@private> |
|--------------------+---------------------------------------------------|
| CVE Name | CVE-2007-3764 |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Description | The Asterisk Skinny channel driver, chan_skinny, has a |
| | remotely exploitable crash vulnerability. A segfault can |
| | occur when Asterisk receives a packet where the claimed |
| | length of the data is between 0 and 3, followed by |
| | length + 4 or more bytes, due to an overly large memcpy. |
| | The side effects of this extremely large memcpy have not |
| | been investigated. |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Resolution | All users that have chan_skinny enabled should upgrade to |
| | the appropriate version listed in the corrected in |
| | section of this advisory. As a workaround, users who do |
| | not require chan_skinny may add the line "noload => |
| | chan_skinny.so" (without quotes) to |
| | /etc/asterisk/modules.conf, and restart Asterisk. |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Affected Versions |
|------------------------------------------------------------------------|
| Product | Release | |
| | Series | |
|----------------------------------+-------------+-----------------------|
| Asterisk Open Source | 1.0.x | All versions |
|----------------------------------+-------------+-----------------------|
| Asterisk Open Source | 1.2.x | All versions prior to |
| | | 1.2.22 |
|----------------------------------+-------------+-----------------------|
| Asterisk Open Source | 1.4.x | All versions prior to |
| | | 1.4.8 |
|----------------------------------+-------------+-----------------------|
| Asterisk Business Edition | A.x.x | All versions |
|----------------------------------+-------------+-----------------------|
| Asterisk Business Edition | B.x.x | All versions prior to |
| | | B.2.2.1 |
|----------------------------------+-------------+-----------------------|
| AsteriskNOW | pre-release | All versions prior to |
| | | beta7 |
|----------------------------------+-------------+-----------------------|
| Asterisk Appliance Developer Kit | 0.x.x | All versions prior to |
| | | 0.5.0 |
|----------------------------------+-------------+-----------------------|
| s800i (Asterisk Appliance) | 1.0.x | All versions prior to |
| | | 1.0.2 |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Corrected In |
|------------------------------------------------------------------------|
| Product | Release |
|--------------------+---------------------------------------------------|
| Asterisk Open | 1.2.22 and 1.4.8, available from |
| Source | ftp://ftp.digium.com/pub/telephony/asterisk |
|--------------------+---------------------------------------------------|
| Asterisk Business | B.2.2.1, available from the Asterisk Business |
| Edition | Edition user portal on http://www.digium.com or |
| | |
| | via Digium Technical Support |
|--------------------+---------------------------------------------------|
| AsteriskNOW | Beta7, available from |
| | http://www.asterisknow.org/. Beta5 and Beta6 |
| | users can update using the system update feature |
| | in the appliance control panel. |
|--------------------+---------------------------------------------------|
| Asterisk Appliance | 0.5.0, available from |
| Developer Kit | |
| | ftp://ftp.digium.com/pub/telephony/aadk/ |
|--------------------+---------------------------------------------------|
| s800i (Asterisk | 1.0.2 |
| Appliance) | |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| 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://ftp.digium.com/pub/asa/ASA-2007-016.pdf. |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Revision History |
|------------------------------------------------------------------------|
| Date | Editor | Revisions Made |
|-------------------+-------------------------+--------------------------|
| July 17, 2007 | jparker@private | Initial Release |
+------------------------------------------------------------------------+
Asterisk Project Security Advisory - ASA-2007-016
Copyright (c) 2007 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.
This archive was generated by hypermail 2.1.3 : Wed Jul 18 2007 - 12:26:06 PDT