{"id":"CVE-2007-4103","details":"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.","modified":"2026-04-10T03:38:59.292611Z","published":"2007-07-31T10:17:00Z","references":[{"type":"ADVISORY","url":"http://secunia.com/advisories/26274"},{"type":"ADVISORY","url":"http://secunia.com/advisories/29051"},{"type":"ADVISORY","url":"http://security.gentoo.org/glsa/glsa-200802-11.xml"},{"type":"ADVISORY","url":"http://www.securityfocus.com/archive/1/475069/100/0/threaded"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/24950"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id?1018472"},{"type":"ADVISORY","url":"http://www.vupen.com/english/advisories/2007/2701"},{"type":"FIX","url":"http://bugs.gentoo.org/show_bug.cgi?id=185713"},{"type":"FIX","url":"http://ftp.digium.com/pub/asa/ASA-2007-018.pdf"},{"type":"FIX","url":"http://secunia.com/advisories/26274"},{"type":"REPORT","url":"http://bugs.gentoo.org/show_bug.cgi?id=185713"},{"type":"WEB","url":"http://ftp.digium.com/pub/asa/ASA-2007-018.pdf"},{"type":"WEB","url":"http://osvdb.org/38197"},{"type":"WEB","url":"http://securityreason.com/securityalert/2960"},{"type":"WEB","url":"http://www.securityfocus.com/archive/1/475069/100/0/threaded"},{"type":"WEB","url":"http://www.securityfocus.com/bid/24950"},{"type":"WEB","url":"http://www.securitytracker.com/id?1018472"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}