If ntpd is configured to allow mrulist query requests from a server that sends a crafted malicious packet, ntpd will crash on receipt of that crafted malicious mrulist query packet.
If ntpd is configured to allow mrulist query requests from a server that sends a crafted malicious packet, ntpd will crash on receipt of that crafted malicious mrulist query packet.
http://support.ntp.org/bin/view/Main/NtpBug3082
Mitigation: Only allow mrulist query packets from trusted hosts.