Asterisk Project Security Advisory - The Asterisk TCP/TLS server suffers from a denial of service vulnerability. Versions 1.6.1.x, 1.6.2.x, and 1.8.x are all affected.
42a118e4489814c5c7daf24ff15ffb8353da113d792cafa89fca1e91546ce0d5
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 <blake@remoteorigin.com> and Chris Maj
<chris@penguinpbx.com>
Posted On March 16, 2011
Last Updated On March 14, 2011
Advisory Contact Terry Wilson <twilson@digium.com>
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This document may be superseded by later versions; if so, the latest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