alert tcp $EXTERNAL_NET any -> $HOME_NET 21 (msg:"GPL FTP LIST buffer overflow attempt"; flow:to_server,established; content:"LIST"; nocase; isdataat:100,relative; pcre:"/^LIST\s[^\n]{100,}/smi"; reference:bugtraq,10181; reference:bugtraq,6869; reference:bugtraq,7251; reference:bugtraq,7861; reference:bugtraq,8486; reference:bugtraq,9675; reference:cve,1999-0349; reference:cve,1999-1510; reference:cve,2000-0129; reference:url,www.microsoft.com/technet/security/bulletin/MS99-003.mspx; classtype:misc-attack; sid:2102338; rev:14; metadata:created_at 2010_09_23, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)