alert udp $EXTERNAL_NET any -> $HOME_NET 5060 (msg:"ET VOIP SIP UDP Softphone INVITE overflow"; dsize:>1000; content:"INVITE"; depth:6; nocase; pcre:"/\r?\n\r?\n/R"; isdataat:1000,relative; reference:bugtraq,16213; reference:cve,2006-0189; classtype:attempted-user; sid:2002848; rev:7; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)