{"id":"CVE-2008-1923","details":"The IAX2 channel driver (chan_iax2) in Asterisk 1.2 before revision 72630 and 1.4 before revision 65679, when configured to allow unauthenticated calls, sends \"early audio\" to an unverified source IP address of a NEW message, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed NEW message.","modified":"2026-04-10T03:39:48.538225Z","published":"2008-04-23T16:05:00Z","references":[{"type":"WEB","url":"http://bugs.digium.com/view.php?id=10078"},{"type":"WEB","url":"http://downloads.digium.com/pub/security/AST-2008-006.html"},{"type":"WEB","url":"http://www.altsci.com/concepts/page.php?s=asteri&p=1"},{"type":"WEB","url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/42049"}],"schema_version":"1.7.5"}