alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"GPL IMAP rename literal overflow attempt"; flow:established,to_server; content:"RENAME"; nocase; content:"{"; distance:1; pcre:"/\sRENAME\s[^\n]*?\s\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,1110; reference:cve,2000-0284; reference:nessus,10374; classtype:misc-attack; sid:2102119; rev:6; metadata:created_at 2010_09_23, confidence Medium, signature_severity Minor, updated_at 2019_07_26;)