alert ftp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL FTP MDTM overflow attempt"; flow:to_server,established; content:"MDTM"; nocase; isdataat:100,relative; pcre:"/^MDTM\s[^\n]{100}/smi"; reference:bugtraq,9751; reference:cve,2001-1021; reference:cve,2004-0330; reference:nessus,12080; classtype:attempted-admin; sid:2102546; rev:7; metadata:created_at 2010_09_23, cve CVE_2001_1021, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)