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.

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of NTP installed on the remote AIX host is affected by the following vulnerabilities :

  - A time serving flaw exists in the trusted key system     due to improper key checks. An authenticated, remote     attacker can exploit this to perform impersonation     attacks between authenticated peers. (CVE-2015-7974)

  - A denial of service vulnerability exists due to improper     handling of a crafted Crypto NAK Packet with a source     address spoofed to match that of an existing associated     peer. An unauthenticated, remote attacker can exploit     this to demobilize a client association. (CVE-2016-1547)

  - An information disclosure vulnerability exists in the     message authentication functionality in libntp that is     triggered during the handling of a series of specially     crafted messages. An adjacent attacker can exploit this     to partially recover the message digest key.
    (CVE-2016-1550)

  - A flaw exists due to improper filtering of IPv4 'bogon'     packets received from a network. An unauthenticated,     remote attacker can exploit this to spoof packets to     appear to come from a specific reference clock.
    (CVE-2016-1551)

  - A denial of service vulnerability exists that allows an     authenticated, remote attacker to manipulate the value     of the trustedkey, controlkey, or requestkey via a     crafted packet, preventing authentication with ntpd     until the daemon has been restarted. (CVE-2016-2517)

  - An out-of-bounds read error exists in the MATCH_ASSOC()     function that occurs during the creation of peer     associations with hmode greater than 7. An     authenticated, remote attacker can exploit this, via a     specially crafted packet, to cause a denial of service.
    (CVE-2016-2518)

  - An overflow condition exists in the ctl_getitem()     function in ntpd due to improper validation of     user-supplied input when reporting return values. An     authenticated, remote attacker can exploit this to cause     ntpd to abort. (CVE-2016-2519)

  - A denial of service vulnerability exists when handling     authentication due to improper packet timestamp checks.
    An unauthenticated, remote attacker can exploit this,     via a specially crafted and spoofed packet, to     demobilize the ephemeral associations. (CVE-2016-4953)

  - A flaw exists that is triggered when handling spoofed     packets. An unauthenticated, remote attacker can exploit     this, via specially crafted packets, to affect peer     variables (e.g., cause leap indications to be set). Note     that the attacker must be able to spoof packets with     correct origin timestamps from servers before expected     response packets arrive. (CVE-2016-4954)

  - A flaw exists that is triggered when handling spoofed     packets. An unauthenticated, remote attacker can exploit     this, via specially crafted packets, to reset autokey     associations. Note that the attacker must be able to     spoof packets with correct origin timestamps from     servers before expected response packets arrive.
    (CVE-2016-4955)

  - A denial of service vulnerability exists when handling     CRYPTO_NAK packets that allows an unauthenticated,     remote attacker to cause a crash. (CVE-2016-4957)

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

These security issues were fixed :

  - CVE-2016-4953: Bad authentication demobilizes ephemeral     associations (bsc#982065).

  - CVE-2016-4954: Processing spoofed server packets     (bsc#982066).

  - CVE-2016-4955: Autokey association reset (bsc#982067).

  - CVE-2016-4956: Broadcast interleave (bsc#982068).

  - CVE-2016-4957: CRYPTO_NAK crash (bsc#982064).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
91663	SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2016:1568-1)	Nessus	SuSE Local Security Checks	2016/6/17	2021/1/6	critical
99183	AIX NTP v4 Advisory : ntp_advisory7.asc (IV87278) (IV87279)	Nessus	AIX Local Security Checks	2017/4/4	2025/12/26	high
91666	SUSE SLES11 Security Update : ntp (SUSE-SU-2016:1584-1)	Nessus	SuSE Local Security Checks	2016/6/17	2021/1/19	high

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