AST-2011-004:

Product Asterisk
Summary Remote crash vulnerability in TCP/TLS server
Nature of Advisory Denial of Service
Susceptibility Remote Unauthenticated Sessions
Severity Critical
Exploits Known No
Reported On March 1, 2011
Reported By Blake Cornell <[email protected]> and Chris Maj
<[email protected]>
Posted On March 16, 2011
Last Updated On March 14, 2011
Advisory Contact Terry Wilson <[email protected]>

           Rapidly opening and closing TCP connections to services using  

Description the ast_tcptls_* API (primarily chan_sip, manager, and
res_phoneprov) can cause Asterisk to crash after dereferencing
a NULL pointer.

Resolution Failure of the fdopen call is detected and dereferencing the
NULL pointer is avoided.

Affected Versions
Product Release Series
Asterisk Open Source 1.6.1.x All versions
Asterisk Open Source 1.6.2.x All versions
Asterisk Open Source 1.8.x All versions

Corrected In
Product Release
Asterisk Open Source 1.6.1.23, 1.6.2.17.1, 1.8.3.1

Patches
URL Branch
http://downloads.asterisk.org/pub/security/AST-2011-004-1.6.1.diff 1.6.1
http://downloads.asterisk.org/pub/security/AST-2011-004-1.6.2.diff 1.6.2
http://downloads.asterisk.org/pub/security/AST-2011-004-1.8.diff 1.8

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This document may be superseded by later versions; if so, the latest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-2011-004.pdf and
http://downloads.digium.com/pub/security/AST-2011-004.html

Revision History
Date Editor Revisions Made
2011-03-14 Terry Wilson Initial release