The handle_response function in chan_sip.c 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 Response code 0 in a SIP packet.Referenceshttp://svn.digium.com/view/asterisk/trunk/channels/chan_sip.c?r1=58907&r2=59038http://www.securityfocus.com/bid/23093http://www.vupen.com/english/advisories/2007/1077http://bugs.digium.com/view.php?id=9313http://www.securitytracker.com/id?1017809http://www.asterisk.org/node/48338http://www.novell.com/linux/security/advisories/2007_34_asterisk.htmlhttp://www.securityfocus.com/archive/1/463434/100/0/threadedhttp://secunia.com/advisories/24579http://security.gentoo.org/glsa/glsa-200704-01.xmlhttp://secunia.com/advisories/25582http://secunia.com/advisories/24719http://www.sineapps.com/news.php?rssid=1707http://voipsa.org/pipermail/voipsec_voipsa.org/2007-March/002275.html
