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

December 12, 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

Patches

SVN URL

Revision

http://svn.digium.com/svn/asterisk-addons/branches/1.2

620

http://svn.digium.com/svn/asterisk-addons/branches/1.4

621

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This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/AST-2008-009.pdf and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

Dec 12, 2008

Mark Michelson

Added the “Patches” section