alert tcp $EXTERNAL_NET any -> $HOME_NET 21 (msg:"GPL FTP XMKD overflow attempt"; flow:to_server,established; content:"XMKD"; nocase; isdataat:100,relative; pcre:"/^XMKD\s[^\n]{100}/smi"; reference:bugtraq,7909; reference:cve,2000-0133; reference:cve,2001-1021; classtype:attempted-admin; sid:2102373; rev:5; 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;)