CVE-2007-5640 Information

Description

The Nortel UNIStim IP Softphone 2050 IP Phone 1140E and additional Nortel products from the IP Phone Business Communications Manager (BCM) Mobile Voice Client and other product lines allow remote attackers to block calls and force re-registration via a resume message to the Signaling Server that has a spoofed source IP address for the phone. NOTE: the attack is more disruptive if a new spoofed resume message is sent after each re-registration.

Reference

http://osvdb.org/41772 http://secunia.com/advisories/27234 http://securityreason.com/securityalert/3274 http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654641 http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_forced_re-authentication_v1.0.txt http://www.securityfocus.com/archive/1/482481/100/0/threaded http://www.securityfocus.com/bid/26124 https://exchange.xforce.ibmcloud.com/vulnerabilities/37254