Notified: December 18, 2014 Updated: December 23, 2014
From the Apple support advisory: "OS X NTP Security Update - ntpd
Available for: OS X Mountain Lion v10.8.5, OS X Mavericks v10.9.5, OS X Yosemite v10.10.1
Impact: A remote attacker may be able to execute arbitrary code
Description: Several issues existed in ntpd that would have allowed an attacker to trigger buffer overflows. These issues were addressed through improved error checking. To verify the ntpd version, type the following command in Terminal: what /usr/sbin/ntpd. This update includes the following versions: Mountain Lion: ntp-77.1.1
CVE-2014-9295 : Stephen Roettger of the Google Security Team"
We are not aware of further vendor information regarding this vulnerability.