alert udp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL RPC tooltalk UDP overflow attempt"; content:"|00 01 86 F3|"; depth:4; offset:12; content:"|00 00 00 07|"; within:4; distance:4; byte_jump:4,4,relative,align; byte_jump:4,4,relative,align; byte_test:4,>,128,0,relative; content:"|00 00 00 00|"; depth:4; offset:4; reference:bugtraq,122; reference:cve,1999-0003; classtype:misc-attack; sid:2101964; rev:9; metadata:created_at 2010_09_23, cve CVE_1999_0003, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)