alert udp $EXTERNAL_NET any -> $HOME_NET 123 (msg:"GPL EXPLOIT ntpdx overflow attempt"; dsize:>128; reference:bugtraq,2540; reference:cve,2001-0414; classtype:attempted-admin; sid:2100312; rev:7; metadata:created_at 2010_09_23, confidence Medium, signature_severity Major, updated_at 2019_07_26;)