alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"GPL IMAP list overflow attempt"; flow:established,to_server; content:"LIST"; nocase; isdataat:100,relative; pcre:"/\sLIST\s[^\n]{100}/smi"; reference:bugtraq,1110; reference:cve,2000-0284; reference:nessus,10374; classtype:misc-attack; sid:2102118; rev:7; metadata:created_at 2010_09_23, confidence Medium, signature_severity Minor, updated_at 2019_07_26;)