SUSE Security Update: Security update for ntp
______________________________________________________________________________

Announcement ID: SUSE-SU-2016:1568-1
Rating: important
References: #957226 #962960 #977450 #977451 #977452 #977455
#977457 #977458 #977459 #977461 #977464 #979302
#979981 #981422 #982064 #982065 #982066 #982067
#982068
Cross-References: CVE-2015-7704 CVE-2015-7705 CVE-2015-7974
CVE-2016-1547 CVE-2016-1548 CVE-2016-1549
CVE-2016-1550 CVE-2016-1551 CVE-2016-2516
CVE-2016-2517 CVE-2016-2518 CVE-2016-2519
CVE-2016-4953 CVE-2016-4954 CVE-2016-4955
CVE-2016-4956 CVE-2016-4957
Affected Products:
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Desktop 12
______________________________________________________________________________

An update that solves 17 vulnerabilities and has two fixes
is now available.

Description:

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.

Patch Instructions:

To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product:

– SUSE Linux Enterprise Server 12:

zypper in -t patch SUSE-SLE-SERVER-12-2016-933=1

– SUSE Linux Enterprise Desktop 12:

zypper in -t patch SUSE-SLE-DESKTOP-12-2016-933=1

To bring your system up-to-date, use “zypper patch”.

Package List:

– SUSE Linux Enterprise Server 12 (ppc64le s390x x86_64):

ntp-4.2.8p8-46.8.1
ntp-debuginfo-4.2.8p8-46.8.1
ntp-debugsource-4.2.8p8-46.8.1
ntp-doc-4.2.8p8-46.8.1

– SUSE Linux Enterprise Desktop 12 (x86_64):

ntp-4.2.8p8-46.8.1
ntp-debuginfo-4.2.8p8-46.8.1
ntp-debugsource-4.2.8p8-46.8.1
ntp-doc-4.2.8p8-46.8.1

References:

https://www.suse.com/security/cve/CVE-2015-7704.html
https://www.suse.com/security/cve/CVE-2015-7705.html
https://www.suse.com/security/cve/CVE-2015-7974.html
https://www.suse.com/security/cve/CVE-2016-1547.html
https://www.suse.com/security/cve/CVE-2016-1548.html
https://www.suse.com/security/cve/CVE-2016-1549.html
https://www.suse.com/security/cve/CVE-2016-1550.html
https://www.suse.com/security/cve/CVE-2016-1551.html
https://www.suse.com/security/cve/CVE-2016-2516.html
https://www.suse.com/security/cve/CVE-2016-2517.html
https://www.suse.com/security/cve/CVE-2016-2518.html
https://www.suse.com/security/cve/CVE-2016-2519.html
https://www.suse.com/security/cve/CVE-2016-4953.html
https://www.suse.com/security/cve/CVE-2016-4954.html
https://www.suse.com/security/cve/CVE-2016-4955.html
https://www.suse.com/security/cve/CVE-2016-4956.html
https://www.suse.com/security/cve/CVE-2016-4957.html
https://bugzilla.suse.com/957226
https://bugzilla.suse.com/962960
https://bugzilla.suse.com/977450
https://bugzilla.suse.com/977451
https://bugzilla.suse.com/977452
https://bugzilla.suse.com/977455
https://bugzilla.suse.com/977457
https://bugzilla.suse.com/977458
https://bugzilla.suse.com/977459
https://bugzilla.suse.com/977461
https://bugzilla.suse.com/977464
https://bugzilla.suse.com/979302
https://bugzilla.suse.com/979981
https://bugzilla.suse.com/981422
https://bugzilla.suse.com/982064
https://bugzilla.suse.com/982065
https://bugzilla.suse.com/982066
https://bugzilla.suse.com/982067
https://bugzilla.suse.com/982068

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