The channel driver in Asterisk before 1.2.17 and 1.4.x before 1.4.2 allows remote attackers to cause a denial of service (crash) via a SIP INVITE message with an SDP containing one valid and one invalid IP address.Referenceshttp://www.securitytracker.com/id?1017794http://marc.info/?l=full-disclosure&m=117432783011737&w=2http://secunia.com/advisories/24564http://asterisk.org/node/48339http://www.novell.com/linux/security/advisories/2007_34_asterisk.htmlhttp://www.securityfocus.com/archive/1/463434/100/0/threadedhttp://www.securityfocus.com/bid/23031https://exchange.xforce.ibmcloud.com/vulnerabilities/33068http://security.gentoo.org/glsa/glsa-200704-01.xmlhttp://secunia.com/advisories/25582http://secunia.com/advisories/24719http://www.sineapps.com/news.php?rssid=1707http://www.vupen.com/english/advisories/2007/1039http://www.debian.org/security/2007/dsa-1358http://www.osvdb.org/34479http://voipsa.org/pipermail/voipsec_voipsa.org/2007-March/002275.html