alert tcp $EXTERNAL_NET any -> $SQL_SERVERS $ORACLE_PORTS (msg:"GPL SQL TO_CHAR buffer overflow attempt"; flow:to_server,established; content:"TO_CHAR"; nocase; pcre:"/TO_CHAR\s*\(\s*SYSTIMESTAMP\s*,\s*(\x27[^\x27]{256}|\x22[^\x22]{256})/smi"; classtype:attempted-user; sid:2102699; rev:2; metadata:created_at 2010_09_23, confidence High, signature_severity Major, updated_at 2019_07_26;)