Multiple unspecified vulnerabilities in Linksys RT31P2 VoIP router allow remote attackers to cause a denial of service via malformed Session Initiation Protocol (SIP) messages.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25915
http://www.vupen.com/english/advisories/2006/1443
http://www.securityfocus.com/bid/17631
http://www.kb.cert.org/vuls/id/MIMG-6GMMW4