Asterisk Project Security Advisory - The ooh323 channel driver provided in Asterisk Addons used a TCP connection to pass commands internally. The payload of these packets included addresses of memory which were to be freed after the command was processed. By sending arbitrary data to the listening TCP socket, one could cause an almost certain crash since the command handler would attempt to free invalid memory. This problem was made worse by the fact that the listening TCP socket was bound to whatever IP address was specified by the "bindaddr" option in ooh323.conf.
aac2cc0599489e9604748b85058afad532715726a0cde88e1b0bcb8f18309c24 Asterisk Project Security Advisory - AST-2008-009
+------------------------------------------------------------------------+
| Product | Asterisk-Addons |
|--------------------+---------------------------------------------------|
| Summary | Remote crash vulnerability in ooh323 channel |
| | driver |
|--------------------+---------------------------------------------------|
| Nature of Advisory | Remote crash |
|--------------------+---------------------------------------------------|
| Susceptibility | Remote unauthenticated sessions |
|--------------------+---------------------------------------------------|
| Severity | Major |
|--------------------+---------------------------------------------------|
| Exploits Known | No |
|--------------------+---------------------------------------------------|
| Reported On | May 29, 2008 |
|--------------------+---------------------------------------------------|
| Reported By | Tzafrir Cohen <tzafrir DOT cohen AT xorcom DOT |
| | com> |
|--------------------+---------------------------------------------------|
| Posted On | June 4, 2008 |
|--------------------+---------------------------------------------------|
| Last Updated On | June 4, 2008 |
|--------------------+---------------------------------------------------|
| Advisory Contact | Mark Michelson <mmichelson AT digium DOT com> |
|--------------------+---------------------------------------------------|
| CVE Name | CVE-2008-2543 |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Description | The ooh323 channel driver provided in Asterisk Addons |
| | used a TCP connection to pass commands internally. The |
| | payload of these packets included addresses of memory |
| | which were to be freed after the command was processed. |
| | By sending arbitrary data to the listening TCP socket, |
| | one could cause an almost certain crash since the |
| | command handler would attempt to free invalid memory. |
| | This problem was made worse by the fact that the |
| | listening TCP socket was bound to whatever IP address |
| | was specified by the "bindaddr" option in ooh323.conf |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Resolution | The TCP connection used by ooh323 has been replaced with |
| | a pipe. The effect of this change is that data from |
| | outside the ooh323 process may not be injected. |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Affected Versions |
|------------------------------------------------------------------------|
| Product | Release | |
| | Series | |
|----------------------------------+-------------+-----------------------|
| Asterisk Open Source | 1.0.x | N/A |
|----------------------------------+-------------+-----------------------|
| Asterisk Open Source | 1.2.x | N/A |
|----------------------------------+-------------+-----------------------|
| Asterisk Open Source | 1.4.x | N/A |
|----------------------------------+-------------+-----------------------|
| Asterisk Addons | 1.2.x | All versions prior to |
| | | 1.2.9 |
|----------------------------------+-------------+-----------------------|
| Asterisk Addons | 1.4.x | All versions prior to |
| | | 1.4.7 |
|----------------------------------+-------------+-----------------------|
| Asterisk Business Edition | A.x.x | N/A |
|----------------------------------+-------------+-----------------------|
| Asterisk Business Edition | B.x.x | N/A |
|----------------------------------+-------------+-----------------------|
| Asterisk Business Edition | C.x.x | N/A |
|----------------------------------+-------------+-----------------------|
| AsteriskNOW | pre-release | N/A |
|----------------------------------+-------------+-----------------------|
| Asterisk Appliance Developer Kit | 0.x.x | N/A |
|----------------------------------+-------------+-----------------------|
| s800i (Asterisk Appliance) | 1.0.x | N/A |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Corrected In |
|------------------------------------------------------------------------|
| Product | Release |
|------------------------------------------+-----------------------------|
| Asterisk Addons 1.2 | 1.2.9 |
|------------------------------------------+-----------------------------|
| Asterisk-Addons 1.4 | 1.4.7 |
|------------------------------------------+-----------------------------|
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| 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-2008-009.pdf and |
| http://downloads.digium.com/pub/security/AST-2008-009.html |
+------------------------------------------------------------------------+
+------------------------------------------------------------------------+
| Revision History |
|------------------------------------------------------------------------|
| Date | Editor | Revisions Made |
|-------------------+----------------------+-----------------------------|
| Jun 3, 2008 | Mark Michelson | Initial draft |
+------------------------------------------------------------------------+
Asterisk Project Security Advisory - AST-2008-009
Copyright (c) 2008 Digium, Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.
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