A flaw in NTP was reported:
If a vulnerable instance of ntpd on Windows receives a crafted malicious packet that is "too big", ntpd will stop working.
Note: this flaw only affects instances of ntpd running on the Windows OS.
This issue did not affect the versions of ntp as shipped with Red Hat Enterprise Linux 5, 6, and 7. This issue only affected ntpd running on the Windows OS.