CVE-2007-5640
No fix known EPSS 2%
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.
Products: nortel business_communications_manager, nortel centrex_ip_client_manager, nortel centrex_ip_element_manager, nortel meridian_option_11c, nortel meridian_option_51c, nortel meridian_option_61c, nortel meridian_option_81c, nortel meridian_sl100, nortel mobile_voice_client_2050