alert ftp $EXTERNAL_NET any -> $HOME_NET 21 (msg:"GPL FTP PASS overflow attempt"; flow:to_server,established,no_stream; content:"PASS"; nocase; isdataat:100,relative; pcre:"/^PASS\s[^\n]{100}/smi"; reference:bugtraq,10078; reference:bugtraq,10720; reference:bugtraq,1690; reference:bugtraq,3884; reference:bugtraq,8601; reference:bugtraq,9285; reference:cve,1999-1519; reference:cve,1999-1539; reference:cve,2000-1035; reference:cve,2002-0126; reference:cve,2002-0895; classtype:attempted-admin; sid:2101972; rev:18; metadata:created_at 2010_09_23, cve CVE_1999_1519, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)