Unspecified vulnerability in the Cisco IP Phone 7940 and 7960 running firmware before POS8-6-0 allows remote attackers to cause a denial of service via the Remote-Party-ID sipURI field in a SIP INVITE request. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33098
http://www.vupen.com/english/advisories/2007/1023
http://www.securitytracker.com/id?1017797
http://www.securityfocus.com/bid/23047
http://www.cisco.com/en/US/products/products_security_response09186a00808075ad.html