alert tcp $EXTERNAL_NET any -> $HOME_NET 119 (msg:"GPL MISC NNTP checkgroups overflow attempt"; flow:to_server,established; content:"checkgroups"; nocase; pcre:"/^checkgroups\x3a[^\n]{21}/smi"; reference:bugtraq,9382; reference:cve,2004-0045; classtype:attempted-admin; sid:2102427; rev:6; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)