alert ftp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL FTP APPE overflow attempt"; flow:to_server,established; content:"APPE"; nocase; isdataat:100,relative; pcre:"/^APPE\s[^\n]{100}/smi"; reference:bugtraq,8315; reference:bugtraq,8542; reference:cve,2000-0133; reference:cve,2003-0466; classtype:attempted-admin; sid:2102391; rev:11; metadata:created_at 2010_09_23, cve CVE_2000_0133, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)