ntp -- 13 low- and medium-severity vulnerabilities

ntp.org reports:

NTF’s NTP Project has been notified of the following 13 low-
and medium-severity vulnerabilities that are fixed in
ntp-4.2.8p4, released on Wednesday, 21 October 2015:

Bug 2941 CVE-2015-7871 NAK to the Future: Symmetric
association authentication bypass via crypto-NAK
(Cisco ASIG)
Bug 2922 CVE-2015-7855 decodenetnum() will ASSERT botch
instead of returning FAIL on some bogus values (IDA)
Bug 2921 CVE-2015-7854 Password Length Memory Corruption
Vulnerability. (Cisco TALOS)
Bug 2920 CVE-2015-7853 Invalid length data provided by a
custom refclock driver could cause a buffer overflow.
(Cisco TALOS)
Bug 2919 CVE-2015-7852 ntpq atoascii() Memory Corruption
Vulnerability. (Cisco TALOS)
Bug 2918 CVE-2015-7851 saveconfig Directory Traversal
Vulnerability. (OpenVMS) (Cisco TALOS)
Bug 2917 CVE-2015-7850 remote config logfile-keyfile.
(Cisco TALOS)
Bug 2916 CVE-2015-7849 trusted key use-after-free.
(Cisco TALOS)
Bug 2913 CVE-2015-7848 mode 7 loop counter underrun.
(Cisco TALOS)
Bug 2909 CVE-2015-7701 Slow memory leak in CRYPTO_ASSOC.
(Tenable)
Bug 2902 : CVE-2015-7703 configuration directives “pidfile”
and “driftfile” should only be allowed locally. (RedHat)
Bug 2901 : CVE-2015-7704, CVE-2015-7705 Clients that
receive a KoD should validate the origin timestamp field.
(Boston University)
Bug 2899 : CVE-2015-7691, CVE-2015-7692, CVE-2015-7702
Incomplete autokey data packet length checks. (Tenable)

The only generally-exploitable bug in the above list is the
crypto-NAK bug, which has a CVSS2 score of 6.4.
Additionally, three bugs that have already been fixed in
ntp-4.2.8 but were not fixed in ntp-4.2.6 as it was EOL’d
have a security component, but are all below 1.8 CVSS score,
so we’re reporting them here:

Bug 2382 : Peer precision < -31 gives division by zero
Bug 1774 : Segfaults if cryptostats enabled when built
without OpenSSL
Bug 1593 : ntpd abort in free() with logconfig syntax error