CVE-2014-4045
The Publish/Subscribe Framework in the PJSIP channel driver in Asterisk Open Source 12.x before 12.3.1, when sub_min_expiry is set to zero, allows remote attackers to cause a denial of service (assertion failure and crash) via an unsubscribe request when not subscribed to the device.
Date published : 2014-06-17
http://www.securityfocus.com/archive/1/532414/100/0/threaded
http://downloads.asterisk.org/pub/security/AST-2014-005.html