alert ftp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL FTP MKD overflow attempt"; flow:to_server,established; content:"MKD"; nocase; isdataat:100,relative; pcre:"/^MKD\s[^\n]{100}/smi"; reference:bugtraq,612; reference:bugtraq,7278; reference:bugtraq,9872; reference:cve,1999-0911; reference:nessus,12108; classtype:attempted-admin; sid:2101973; rev:11; metadata:created_at 2010_09_23, cve CVE_1999_0911, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)