The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the "other side" of an interleaved association causing the victim ntpd to reset its association.

The version of F5 Networks BIG-IP installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the K04912972 advisory.

  - The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service     (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the     other side of an interleaved association causing the victim ntpd to reset its association.
    (CVE-2018-7185)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the ntp packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The rate limiting feature in NTP 4.x before 4.2.8p4 and     4.3.x before 4.3.77 allows remote attackers to have     unspecified impact via a large number of crafted     requests.

  - Mitigation:Do not add the 'limited' configuration     option to any restrict lines in the ntp.conf     file.(CVE-2015-7705)

  - The protocol engine in ntp 4.2.6 before 4.2.8p11 allows     a remote attackers to cause a denial of service     (disruption) by continually sending a packet with a     zero-origin timestamp and source IP address of the     'other side' of an interleaved association causing the     victim ntpd to reset its association(CVE-2018-7185)

  - The ntpq saveconfig command in NTP 4.1.2, 4.2.x before     4.2.8p6, 4.3, 4.3.25, 4.3.70, and 4.3.77 does not     properly filter special characters, which allows     attackers to cause unspecified impact via a crafted     filename.(CVE-2015-7976)

  - ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before     4.3.77 allows remote authenticated users to cause a     denial of service (infinite loop or crash) by pointing     the key file at the log file.

  - Mitigation:Disable NTP remote configuration or limit     this feature to trusted users to effectively mitigate     this risk(CVE-2015-7850)

  - The datalen parameter in the refclock driver in NTP     4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows     remote attackers to execute arbitrary code or cause a     denial of service (crash) via a negative input     value.(CVE-2015-7853)

  - Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4,     and 4.3.x before 4.3.77 allows remote attackers to     bypass authentication.(CVE-2015-7871)

  - The decodenetnum function in ntpd in NTP 4.2.x before     4.2.8p4, and 4.3.x before 4.3.77 allows remote     attackers to cause a denial of service (assertion     failure) via a 6 or mode 7 packet containing a long     data value.(CVE-2015-7855)

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

According to the versions of the ntp packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - It was found that ntpd did not check whether a Message     Authentication Code (MAC) was present in a received     packet when ntpd was configured to use symmetric     cryptographic keys. A man-in-the-middle attacker could     use this flaw to send crafted packets that would be     accepted by a client or a peer without the attacker     knowing the symmetric key.(CVE-2015-1798)

  - A missing return statement in the receive() function     could potentially allow a remote attacker to bypass     NTP's authentication mechanism.(CVE-2014-9296)

  - The rate limiting feature in NTP 4.x before 4.2.8p4 and     4.3.x before 4.3.77 allows remote attackers to have     unspecified impact via a large number of crafted     requests.(CVE-2015-7705)

  - The datalen parameter in the refclock driver in NTP     4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows     remote attackers to execute arbitrary code or cause a     denial of service (crash) via a negative input     value.(CVE-2015-7853)

  - Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4,     and 4.3.x before 4.3.77 allows remote attackers to     bypass authentication.(CVE-2015-7871)

  - The protocol engine in ntp 4.2.6 before 4.2.8p11 allows     a remote attackers to cause a denial of service     (disruption) by continually sending a packet with a     zero-origin timestamp and source IP address of the     ''other side'' of an interleaved association causing     the victim ntpd to reset its     association.(CVE-2018-7185)

  - The ntpq saveconfig command in NTP 4.1.2, 4.2.x before     4.2.8p6, 4.3, 4.3.25, 4.3.70, and 4.3.77 does not     properly filter special characters, which allows     attackers to cause unspecified impact via a crafted     filename.(CVE-2015-7976)

  - ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before     4.3.77 allows remote authenticated users to cause a     denial of service (infinite loop or crash) by pointing     the key file at the log file.(CVE-2015-7850)

  - The decodenetnum function in ntpd in NTP 4.2.x before     4.2.8p4, and 4.3.x before 4.3.77 allows remote     attackers to cause a denial of service (assertion     failure) via a 6 or mode 7 packet containing a long     data value.(CVE-2015-7855)

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

According to the versions of the ntp packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The rate limiting feature in NTP 4.x before 4.2.8p4 and     4.3.x before 4.3.77 allows remote attackers to have     unspecified impact via a large number of crafted     requests.

  - Mitigation:Do not add the 'limited' configuration     option to any restrict lines in the ntp.conf     file.(CVE-2015-7705)

  - The protocol engine in ntp 4.2.6 before 4.2.8p11 allows     a remote attackers to cause a denial of service     (disruption) by continually sending a packet with a     zero-origin timestamp and source IP address of the     'other side' of an interleaved association causing the     victim ntpd to reset its association(CVE-2018-7185)

  - The ntpq saveconfig command in NTP 4.1.2, 4.2.x before     4.2.8p6, 4.3, 4.3.25, 4.3.70, and 4.3.77 does not     properly filter special characters, which allows     attackers to cause unspecified impact via a crafted     filename.(CVE-2015-7976)

  - ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before     4.3.77 allows remote authenticated users to cause a     denial of service (infinite loop or crash) by pointing     the key file at the log file.

  - Mitigation:Disable NTP remote configuration or limit     this feature to trusted users to effectively mitigate     this risk(CVE-2015-7850)

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

According to the versions of the ntp packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - The rate limiting feature in NTP 4.x before 4.2.8p4 and     4.3.x before 4.3.77 allows remote attackers to have     unspecified impact via a large number of crafted     requests.i1/4^CVE-2015-7705i1/4%0

  - The datalen parameter in the refclock driver in NTP     4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows     remote attackers to execute arbitrary code or cause a     denial of service (crash) via a negative input     value.i1/4^CVE-2015-7853i1/4%0

  - Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4,     and 4.3.x before 4.3.77 allows remote attackers to     bypass authentication.i1/4^CVE-2015-7871i1/4%0

  - The protocol engine in ntp 4.2.6 before 4.2.8p11 allows     a remote attackers to cause a denial of service     (disruption) by continually sending a packet with a     zero-origin timestamp and source IP address of the     'other side' of an interleaved association causing the     victim ntpd to reset its     association.i1/4^CVE-2018-7185i1/4%0

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

An update of the ntp package has been released.

This update for ntp fixes the following issues :

Update to 4.2.8p11 (bsc#1082210) :

  - CVE-2016-1549: Sybil vulnerability: ephemeral     association attack. While fixed in ntp-4.2.8p7, there     are significant additional protections for this issue in     4.2.8p11.

  - CVE-2018-7182: ctl_getitem(): buffer read overrun leads     to undefined behavior and information leak.
    (bsc#1083426)

  - CVE-2018-7170: Multiple authenticated ephemeral     associations. (bsc#1083424)

  - CVE-2018-7184: Interleaved symmetric mode cannot recover     from bad state. (bsc#1083422)

  - CVE-2018-7185: Unauthenticated packet can reset     authenticated interleaved association. (bsc#1083420)

  - CVE-2018-7183: ntpq:decodearr() can write beyond its     buffer limit.(bsc#1083417)

Don't use libevent's cached time stamps in sntp. (bsc#1077445)

This update is a reissue of the previous update with LTSS channels included.

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.

Yihan Lian discovered that NTP incorrectly handled certain malformed mode 6 packets. A remote attacker could possibly use this issue to cause ntpd to crash, resulting in a denial of service. This issue only affected Ubuntu 17.10 and Ubuntu 18.04 LTS. (CVE-2018-7182)

Michael Macnair discovered that NTP incorrectly handled certain responses. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2018-7183)

Miroslav Lichvar discovered that NTP incorrectly handled certain zero-origin timestamps. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 17.10 and Ubuntu 18.04 LTS. (CVE-2018-7184)

Miroslav Lichvar discovered that NTP incorrectly handled certain zero-origin timestamps. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2018-7185).

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

This update for ntp fixes the following issues :

  - Update to 4.2.8p11 (bsc#1082210) :

  - CVE-2016-1549: Sybil vulnerability: ephemeral     association attack. While fixed in ntp-4.2.8p7, there     are significant additional protections for this issue in     4.2.8p11.

  - CVE-2018-7182: ctl_getitem(): buffer read overrun leads     to undefined behavior and information leak.
    (bsc#1083426)

  - CVE-2018-7170: Multiple authenticated ephemeral     associations. (bsc#1083424)

  - CVE-2018-7184: Interleaved symmetric mode cannot recover     from bad state. (bsc#1083422)

  - CVE-2018-7185: Unauthenticated packet can reset     authenticated interleaved association. (bsc#1083420)

  - CVE-2018-7183: ntpq:decodearr() can write beyond its     buffer limit.(bsc#1083417)

  - Don't use libevent's cached time stamps in sntp.
    (bsc#1077445) This update is a reissue of the previous     update with LTSS channels included.

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.

This update for ntp fixes the following issues :

  - Update to 4.2.8p11 (bsc#1082210) :

  - CVE-2016-1549: Sybil vulnerability: ephemeral     association attack. While fixed in ntp-4.2.8p7, there     are significant additional protections for this issue in     4.2.8p11.

  - CVE-2018-7182: ctl_getitem(): buffer read overrun leads     to undefined behavior and information leak.
    (bsc#1083426)

  - CVE-2018-7170: Multiple authenticated ephemeral     associations. (bsc#1083424)

  - CVE-2018-7184: Interleaved symmetric mode cannot recover     from bad state. (bsc#1083422)

  - CVE-2018-7185: Unauthenticated packet can reset     authenticated interleaved association. (bsc#1083420)

  - CVE-2018-7183: ntpq:decodearr() can write beyond its     buffer limit.(bsc#1083417)

  - Don't use libevent's cached time stamps in sntp.
    (bsc#1077445)

  - Fix systemd migration in %pre (bsc#1034892).

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 remote host is affected by the vulnerability described in GLSA-201805-12 (NTP: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in NTP. Please review the       CVE identifiers referenced below for details.
  Impact :

    A remote attacker could possibly execute arbitrary code or cause a       Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

Ephemeral association time spoofing additional protection

ntpd in ntp 4.2.x before 4.2.8p7 and 4.3.x before 4.3.92 allows authenticated users that know the private symmetric key to create arbitrarily-many ephemeral associations in order to win the clock selection of ntpd and modify a victim's clock via a Sybil attack. This issue exists because of an incomplete fix for CVE-2016-1549 .(CVE-2018-7170)

Interleaved symmetric mode cannot recover from bad state

ntpd in ntp 4.2.8p4 before 4.2.8p11 drops bad packets before updating the 'received' timestamp, which allows remote attackers to cause a denial of service (disruption) by sending a packet with a zero-origin timestamp causing the association to reset and setting the contents of the packet as the most recent timestamp. This issue is a result of an incomplete fix for CVE-2015-7704 .(CVE-2018-7184)

Ephemeral association time spoofing

A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.(CVE-2016-1549)

Buffer read overrun leads information leak in ctl_getitem()

The ctl_getitem method in ntpd in ntp-4.2.8p6 before 4.2.8p11 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted mode 6 packet with a ntpd instance from 4.2.8p6 through 4.2.8p10. (CVE-2018-7182)

Unauthenticated packet can reset authenticated interleaved association

The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the 'other side' of an interleaved association causing the victim ntpd to reset its association.(CVE-2018-7185)

decodearr() can write beyond its buffer limit

Buffer overflow in the decodearr function in ntpq in ntp 4.2.8p6 through 4.2.8p10 allows remote attackers to execute arbitrary code by leveraging an ntpq query and sending a response with a crafted array.(CVE-2018-7183)

This update for ntp fixes the following issues :

  - Update to 4.2.8p11 (bsc#1082210) :

  - CVE-2016-1549: Sybil vulnerability: ephemeral     association attack. While fixed in ntp-4.2.8p7, there     are significant additional protections for this issue in     4.2.8p11.

  - CVE-2018-7182: ctl_getitem(): buffer read overrun leads     to undefined behavior and information leak.
    (bsc#1083426)

  - CVE-2018-7170: Multiple authenticated ephemeral     associations. (bsc#1083424)

  - CVE-2018-7184: Interleaved symmetric mode cannot recover     from bad state. (bsc#1083422)

  - CVE-2018-7185: Unauthenticated packet can reset     authenticated interleaved association. (bsc#1083420)

  - CVE-2018-7183: ntpq:decodearr() can write beyond its     buffer limit.(bsc#1083417)

  - Don't use libevent's cached time stamps in sntp.
    (bsc#1077445)

This update was imported from the SUSE:SLE-12-SP1:Update update project.

This update for ntp fixes the following issues :

  - Update to 4.2.8p11 (bsc#1082210) :

  - CVE-2016-1549: Sybil vulnerability: ephemeral     association attack. While fixed in ntp-4.2.8p7, there     are significant additional protections for this issue in     4.2.8p11.

  - CVE-2018-7182: ctl_getitem(): buffer read overrun leads     to undefined behavior and information leak.
    (bsc#1083426)

  - CVE-2018-7170: Multiple authenticated ephemeral     associations. (bsc#1083424)

  - CVE-2018-7184: Interleaved symmetric mode cannot recover     from bad state. (bsc#1083422)

  - CVE-2018-7185: Unauthenticated packet can reset     authenticated interleaved association. (bsc#1083420)

  - CVE-2018-7183: ntpq:decodearr() can write beyond its     buffer limit.(bsc#1083417)

  - Don't use libevent's cached time stamps in sntp.
    (bsc#1077445)

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.

This update for ntp fixes the following issues: Security issues fixed :

  - CVE-2016-1549: Significant additional protections     against CVE-2016-1549 that was fixed in ntp-4.2.8p7     (bsc#1082210).

  - CVE-2018-7170: Ephemeral association time spoofing     additional protection (bsc#1083424).

  - CVE-2018-7182: Buffer read overrun leads information     leak in ctl_getitem() (bsc#1083426).

  - CVE-2018-7183: decodearr() can write beyond its buffer     limit (bsc#1083417).

  - CVE-2018-7184: Interleaved symmetric mode cannot recover     from bad state (bsc#1083422).

  - CVE-2018-7185: Unauthenticated packet can reset     authenticated interleaved association (bsc#1083420). Bug     fixes :

  - bsc#1077445: Don't use libevent's cached time stamps in     sntp.

  - Disable CMAC in ntp when building against a version of     OpenSSL that doesn't support it.

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 the remote NTP server is 4.x prior to 4.2.8p11. It is, therefore, affected by multiple vulnerabilities, which allow denial of service attacks, information disclosure and possibly, remote code execution.

New ntp packages are available for Slackware 14.0, 14.1, 14.2, and
-current to fix security issues.

Network Time Foundation reports :

The NTP Project at Network Time Foundation is releasing ntp-4.2.8p11.

This release addresses five security issues in ntpd :

- LOW/MEDIUM: Sec 3012 / CVE-2016-1549 / VU#961909: Sybil vulnerability: ephemeral association attack

- INFO/MEDIUM: Sec 3412 / CVE-2018-7182 / VU#961909 : ctl_getitem():
buffer read overrun leads to undefined behavior and information leak

- LOW: Sec 3415 / CVE-2018-7170 / VU#961909: Multiple authenticated ephemeral associations

- LOW: Sec 3453 / CVE-2018-7184 / VU#961909: Interleaved symmetric mode cannot recover from bad state

- LOW/MEDIUM: Sec 3454 / CVE-2018-7185 / VU#961909 : Unauthenticated packet can reset authenticated interleaved association

one security issue in ntpq :

- MEDIUM: Sec 3414 / CVE-2018-7183 / VU#961909 : ntpq:decodearr() can write beyond its buffer limit

and provides over 33 bugfixes and 32 other improvements.

ID	Name	Product	Family	Severity
184236	F5 Networks BIG-IP : NTP vulnerability (K04912972)	Nessus	F5 Networks Local Security Checks	high
129259	EulerOS 2.0 SP3 : ntp (EulerOS-SA-2019-2066)	Nessus	Huawei Local Security Checks	critical
126847	EulerOS 2.0 SP2 : ntp (EulerOS-SA-2019-1719)	Nessus	Huawei Local Security Checks	critical
125010	EulerOS Virtualization 3.0.1.0 : ntp (EulerOS-SA-2019-1557)	Nessus	Huawei Local Security Checks	critical
124450	EulerOS 2.0 SP5 : ntp (EulerOS-SA-2019-1323)	Nessus	Huawei Local Security Checks	critical
123908	EulerOS Virtualization 2.5.3 : ntp (EulerOS-SA-2019-1222)	Nessus	Huawei Local Security Checks	critical
121863	Photon OS 1.0: Ntp PHSA-2018-1.0-0167	Nessus	PhotonOS Local Security Checks	critical
118269	SUSE SLES12 Security Update : ntp (SUSE-SU-2018:1765-2)	Nessus	SuSE Local Security Checks	critical
110974	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : NTP vulnerabilities (USN-3707-1)	Nessus	Ubuntu Local Security Checks	critical
110639	SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2018:1765-1)	Nessus	SuSE Local Security Checks	critical
110224	SUSE SLES12 Security Update : ntp (SUSE-SU-2018:1464-1)	Nessus	SuSE Local Security Checks	critical
110176	GLSA-201805-12 : NTP: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
109697	Amazon Linux AMI : ntp (ALAS-2018-1009)	Nessus	Amazon Linux Local Security Checks	critical
109102	openSUSE Security Update : ntp (openSUSE-2018-376)	Nessus	SuSE Local Security Checks	critical
109085	SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2018:0956-1)	Nessus	SuSE Local Security Checks	critical
108651	SUSE SLES11 Security Update : ntp (SUSE-SU-2018:0808-1)	Nessus	SuSE Local Security Checks	critical
107258	Network Time Protocol Daemon (ntpd) 4.x < 4.2.8p11 Multiple Vulnerabilities	Nessus	Misc.	critical
107103	Slackware 14.0 / 14.1 / 14.2 / current : ntp (SSA:2018-060-02)	Nessus	Slackware Local Security Checks	high
107046	FreeBSD : ntp -- multiple vulnerabilities (af485ef4-1c58-11e8-8477-d05099c0ae8c)	Nessus	FreeBSD Local Security Checks	critical

Detections

Analytics

CVE-2018-7185

high

Tenable Plugins

high

critical

critical

critical

critical

critical

critical

critical

critical

critical

critical

critical

critical

critical

critical

critical

critical

high

critical