This update for ntp to 4.2.8p7 fixes the following issues: * CVE-2016-1547, bsc#977459: Validate crypto-NAKs, AKA: CRYPTO-NAK DoS. * CVE-2016-1548, bsc#977461: Interleave-pivot * CVE-2016-1549, bsc#977451: Sybil vulnerability: ephemeral association attack. * CVE-2016-1550, bsc#977464: Improve NTP security against buffer comparison timing attacks. * CVE-2016-1551, bsc#977450: Refclock impersonation vulnerability * CVE-2016-2516, bsc#977452: Duplicate IPs on unconfig directives will cause an assertion botch in ntpd. * CVE-2016-2517, bsc#977455: remote configuration trustedkey/ requestkey/controlkey values are not properly validated. * CVE-2016-2518, bsc#977457: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC. * CVE-2016-2519, bsc#977458: ctl_getitem return value not always checked. * This update also improves the fixes for: CVE-2015-7704, CVE-2015-7705, CVE-2015-7974 Bugs fixed: - Restrict the parser in the startup script to the first occurrance of "keys" and "controlkey" in ntp.conf .