alert tcp $EXTERNAL_NET any -> $HOME_NET 111 (msg:"GPL RPC portmap proxy integer overflow attempt TCP"; flow:to_server,established; content:"|00 01 86 A0 00|"; depth:5; offset:16; content:"|00 00 00 05|"; within:4; distance:3; byte_jump:4,4,relative,align; byte_jump:4,4,relative,align; byte_test:4,>,2048,12,relative; content:"|00 00 00 00|"; depth:4; offset:8; reference:bugtraq,7123; reference:cve,2003-0028; classtype:rpc-portmap-decode; sid:2102093; rev:6; metadata:created_at 2010_09_23, cve CVE_2003_0028, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)