alert ftp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL FTP SITE CPWD overflow attempt"; flow:established,to_server; content:"SITE"; nocase; content:"CPWD"; distance:0; nocase; isdataat:100,relative; pcre:"/^SITE\s+CPWD\s[^\n]{100}/smi"; reference:bugtraq,5427; reference:cve,2002-0826; classtype:misc-attack; sid:2101888; rev:9; metadata:created_at 2010_09_23, cve CVE_2002_0826, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)