The version of the remote NTP server is 3.x or 4.x prior to 4.2.8p7.
It is, therefore, affected by the following vulnerabilities :

  - A denial of service vulnerability exists due to improper     validation of the origin timestamp field when handling a     Kiss-of-Death (KoD) packet. An unauthenticated, remote     attacker can exploit this to cause a client to stop     querying its servers, preventing the client from     updating its clock. (CVE-2015-7704)

  - A flaw exists in the receive() function in ntp_proto.c     that allows packets with an origin timestamp of zero to     bypass security checks. An unauthenticated, remote     attacker can exploit this to spoof arbitrary content.
    (CVE-2015-8138)

  - 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)

  - A denial of service vulnerability exists due to improper     handling of packets spoofed to appear to be from a valid     ntpd server. An unauthenticated, remote attacker can     exploit this to cause NTP to switch from basic     client/server mode to interleaved symmetric mode,     causing the client to reject future legitimate     responses. (CVE-2016-1548)

  - A race condition exists that is triggered during the     handling of a saturation of ephemeral associations. An     authenticated, remote attacker can exploit this to     defeat NTP's clock selection algorithm and modify a     user's clock. (CVE-2016-1549)

  - 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 that has knowledge of the     controlkey for ntpq or the requestkey for ntpdc to     create a session with the same IP twice on an     unconfigured directive line, causing ntpd to abort.
    (CVE-2016-2516)

  - 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)

NTP was updated to version 4.2.8p8 to fix several security issues and to ensure the continued maintainability of the package.

These security issues were fixed :

CVE-2016-4953: Bad authentication demobilized 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).

CVE-2016-1547: Validate crypto-NAKs to prevent ACRYPTO-NAK DoS (bsc#977459).

CVE-2016-1548: Prevent the change of time of an ntpd client or denying service to an ntpd client by forcing it to change from basic client/server mode to interleaved symmetric mode (bsc#977461).

CVE-2016-1549: Sybil vulnerability: ephemeral association attack (bsc#977451).

CVE-2016-1550: Improve security against buffer comparison timing attacks (bsc#977464).

CVE-2016-1551: Refclock impersonation vulnerability (bsc#977450)y

CVE-2016-2516: Duplicate IPs on unconfig directives could have caused an assertion botch in ntpd (bsc#977452).

CVE-2016-2517: Remote configuration trustedkey/ requestkey/controlkey values are not properly validated (bsc#977455).

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-2015-8158: Potential Infinite Loop in ntpq (bsc#962966).

CVE-2015-8138: Zero Origin Timestamp Bypass (bsc#963002).

CVE-2015-7979: Off-path Denial of Service (DoS) attack on authenticated broadcast mode (bsc#962784).

CVE-2015-7978: Stack exhaustion in recursive traversal of restriction list (bsc#963000).

CVE-2015-7977: reslist NULL pointer dereference (bsc#962970).

CVE-2015-7976: ntpq saveconfig command allowed dangerous characters in filenames (bsc#962802).

CVE-2015-7975: nextvar() missing length check (bsc#962988).

CVE-2015-7974: NTP did not verify peer associations of symmetric keys when authenticating packets, which might have allowed remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a 'skeleton' key (bsc#962960).

CVE-2015-7973: Replay attack on authenticated broadcast mode (bsc#962995).

CVE-2015-5300: MITM attacker can force ntpd to make a step larger than the panic threshold (bsc#951629).

CVE-2015-5194: Crash with crafted logconfig configuration command (bsc#943218).

CVE-2015-7871: NAK to the Future: Symmetric association authentication bypass via crypto-NAK (bsc#952611).

CVE-2015-7855: decodenetnum() will ASSERT botch instead of returning FAIL on some bogus values (bsc#952611).

CVE-2015-7854: Password Length Memory Corruption Vulnerability (bsc#952611).

CVE-2015-7853: Invalid length data provided by a custom refclock driver could cause a buffer overflow (bsc#952611).

CVE-2015-7852: ntpq atoascii() Memory Corruption Vulnerability (bsc#952611).

CVE-2015-7851: saveconfig Directory Traversal Vulnerability (bsc#952611).

CVE-2015-7850: Clients that receive a KoD now validate the origin timestamp field (bsc#952611).

CVE-2015-7849: Prevent use-after-free trusted key (bsc#952611).

CVE-2015-7848: Prevent mode 7 loop counter underrun (bsc#952611).

CVE-2015-7701: Slow memory leak in CRYPTO_ASSOC (bsc#952611).

CVE-2015-7703: Configuration directives 'pidfile' and 'driftfile' should only be allowed locally (bsc#943221).

CVE-2015-7704: Clients that receive a KoD should validate the origin timestamp field (bsc#952611).

CVE-2015-7705: Clients that receive a KoD should validate the origin timestamp field (bsc#952611).

CVE-2015-7691: Incomplete autokey data packet length checks (bsc#952611).

CVE-2015-7692: Incomplete autokey data packet length checks (bsc#952611).

CVE-2015-7702: Incomplete autokey data packet length checks (bsc#952611).

CVE-2015-1798: The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP required a correct MAC only if the MAC field has a nonzero length, which made it easier for man-in-the-middle attackers to spoof packets by omitting the MAC (bsc#924202).

CVE-2015-1799: The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP performed state-variable updates upon receiving certain invalid packets, which made it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer (bsc#924202).

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
90923	Network Time Protocol Daemon (ntpd) 3.x / 4.x < 4.2.8p7 Multiple Vulnerabilities	Nessus	Misc.	2016/5/5	2019/11/19	critical
93186	SUSE SLES10 Security Update : ntp (SUSE-SU-2016:1912-1)	Nessus	SuSE Local Security Checks	2016/8/29	2026/1/27	critical

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