Security update for ntp (important)

ntp was updated to version 4.2.8p8 to fix 17 security issues.

These security issues were fixed:

• CVE-2016-4956: Broadcast interleave (bsc#982068).
• CVE-2016-2518: Crafted addpeer with hmode > 7 causes array wraparound
  with MATCH_ASSOC (bsc#977457).
• CVE-2016-2519: ctl_getitem() return value not always checked
  (bsc#977458).
• CVE-2016-4954: Processing spoofed server packets (bsc#982066).
• CVE-2016-4955: Autokey association reset (bsc#982067).
• CVE-2015-7974: NTP did not verify peer associations of symmetric keys
  when authenticating packets, which might allowed remote attackers to
  conduct impersonation attacks via an arbitrary trusted key, aka a
  "skeleton key (bsc#962960).
• CVE-2016-4957: CRYPTO_NAK crash (bsc#982064).
• CVE-2016-2516: Duplicate IPs on unconfig directives will cause an
  assertion botch (bsc#977452).
• CVE-2016-2517: Remote configuration trustedkey/requestkey values are not
  properly validated (bsc#977455).
• CVE-2016-4953: Bad authentication demobilizes ephemeral associations
  (bsc#982065).
• CVE-2016-1547: CRYPTO-NAK DoS (bsc#977459).
• CVE-2016-1551: Refclock impersonation vulnerability, AKA:
  refclock-peering (bsc#977450).
• CVE-2016-1550: Improve NTP security against buffer comparison timing
  attacks, authdecrypt-timing, AKA: authdecrypt-timing (bsc#977464).
• CVE-2016-1548: Interleave-pivot - MITIGATION ONLY (bsc#977461).
• CVE-2016-1549: Sybil vulnerability: ephemeral association attack, AKA:
  ntp-sybil - MITIGATION ONLY (bsc#977451).

This release also contained improved patches for CVE-2015-7704,
CVE-2015-7705, CVE-2015-7974.

These non-security issues were fixed:

• bsc#979302: Change the process name of the forking DNS worker process to
  avoid the impression that ntpd is started twice.
• bsc#981422: Don’t ignore SIGCHILD because it breaks wait().
• bsc#979981: ntp-wait does not accept fractional seconds, so use 1
  instead of 0.2 in ntp-wait.service.
• Separate the creation of ntp.keys and key #1 in it to avoid problems
  when upgrading installations that have the file, but no key #1, which is
  needed e.g. by "rcntp addserver".
• bsc#957226: Restrict the parser in the startup script to the first
  occurrance of "keys" and "controlkey" in ntp.conf.