alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"GPL IMAP login literal buffer overflow attempt"; flow:established,to_server; content:"LOGIN"; nocase; pcre:"/\sLOGIN\s[^\n]*?\s\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,6298; classtype:misc-attack; sid:2101993; rev:5; metadata:created_at 2010_09_23, confidence High, signature_severity Major, updated_at 2019_07_26;)