alert tcp $EXTERNAL_NET any -> $HOME_NET 21 (msg:"GPL FTP LIST integer overflow attempt"; flow:to_server,established; content:"LIST"; nocase; pcre:"/^LIST\s+\x22-W\s+\d/smi"; reference:bugtraq,8875; reference:cve,2003-0853; reference:cve,2003-0854; classtype:misc-attack; sid:2102272; rev:6; metadata:created_at 2010_09_23, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)