CVE ID:	CVE-2007-4103
Description:	The IAX2 channel driver (chan_iax2) in Asterisk Open 1.2.x before 1.2.23, 1.4.x before 1.4.9, and Asterisk Appliance Developer Kit before 0.6.0, when configured to allow unauthenticated calls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of calls that do not complete a 3-way handshake, which causes an ast_channel to be allocated but not released.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2007-4103 BugTraq ID: 24950 http://www.securityfocus.com/bid/24950 Bugtraq: 20070729 ASA-2007-018: Resource exhaustion vulnerability in IAX2 channel driver (Google Search) http://www.securityfocus.com/archive/1/475069/100/0/threaded http://security.gentoo.org/glsa/glsa-200802-11.xml http://osvdb.org/38197 http://www.securitytracker.com/id?1018472 http://secunia.com/advisories/26274 http://secunia.com/advisories/29051 http://securityreason.com/securityalert/2960 http://www.vupen.com/english/advisories/2007/2701