CVE-2014-4048
The PJSIP Channel Driver in Asterisk Open Source before 12.3.1 allows remote attackers to cause a denial of service (deadlock) by terminating a subscription request before it is complete, which triggers a SIP transaction timeout.
Date published : 2014-06-17
http://www.securityfocus.com/archive/1/532416/100/0/threaded
http://downloads.asterisk.org/pub/security/AST-2014-008.html