alert ip any any -> any any (msg:"GPL EXPLOIT IGMP IGAP message overflow attempt"; ip_proto:2; byte_test:1,>,63,0; byte_test:1,<,67,0; byte_test:1,>,64,13; reference:bugtraq,9952; reference:cve,2004-0176; reference:cve,2004-0367; classtype:attempted-admin; sid:2102463; rev:8; metadata:created_at 2010_09_23, confidence Medium, signature_severity Major, updated_at 2019_07_26;)