alert tcp $EXTERNAL_NET any -> $HOME_NET 111 (msg:"GPL RPC portmap espd request TCP"; flow:to_server,established; content:"|00 01 86 A0|"; depth:4; offset:16; content:"|00 00 00 03|"; within:4; distance:4; byte_jump:4,4,relative,align; byte_jump:4,4,relative,align; content:"|00 05 F7|u"; within:4; content:"|00 00 00 00|"; depth:4; offset:8; reference:bugtraq,2714; reference:cve,2001-0331; classtype:rpc-portmap-decode; sid:2100595; rev:17; metadata:created_at 2010_09_23, cve CVE_2001_0331, signature_severity Informational, updated_at 2019_07_26;)