CVE-2007-4103 Information

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.

Reference

http://bugs.gentoo.org/show_bug.cgi?id=185713 http://ftp.digium.com/pub/asa/ASA-2007-018.pdf http://osvdb.org/38197 http://secunia.com/advisories/26274 http://secunia.com/advisories/29051 http://security.gentoo.org/glsa/glsa-200802-11.xml http://securityreason.com/securityalert/2960 http://www.securityfocus.com/archive/1/475069/100/0/threaded http://www.securityfocus.com/bid/24950 http://www.securitytracker.com/id?1018472 http://www.vupen.com/english/advisories/2007/2701