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;
)