This update for ntp fixes the following issues: - Update to 4.2.8p11 : * CVE-2016-1549: Sybil vulnerability: ephemeral association attack. While fixed in ntp-4.2.8p7, there are significant additional protections for this issue in 4.2.8p11. * CVE-2018-7182: ctl_getitem: buffer read overrun leads to undefined behavior and information leak. * CVE-2018-7170: Multiple authenticated ephemeral associations. * CVE-2018-7184: Interleaved symmetric mode cannot recover from bad state. * CVE-2018-7185: Unauthenticated packet can reset authenticated interleaved association. * CVE-2018-7183: ntpq:decodearr can write beyond its buffer limit. - Don"t use libevent"s cached time stamps in sntp