Vulnerability Monitor

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CVE-2018-7170

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction requiring only low-level privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 10 products from ntp, from synology, from synology and 7 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-03-06T20:29:01.297

Last Modified

2025-01-14T19:29:55.853

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: SINGLE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

6.8

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	ntp	ntp	< 4.2.8	Yes
Application	ntp	ntp	< 4.3.92	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	synology	router_manager	< 1.1.6-6931-3	Yes
Application	synology	skynas	< 6.1.5-15254	Yes
Application	synology	virtual_diskstation_manager	< 6.1.6-15266	Yes
Operating System	synology	diskstation_manager	< 6.1.6-15266	Yes
Operating System	synology	vs960hd_firmware	< 2.2.3-1505	Yes
Hardware	synology	vs960hd	-	No
Application	netapp	hci	-	Yes
Application	netapp	solidfire	-	Yes
Application	hpe	hpux-ntp	< c.4.2.8.4.0	Yes

References

http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html Third Party Advisory, VDB Entry ([email protected])
http://support.ntp.org/bin/view/Main/NtpBug3415 Third Party Advisory ([email protected])
http://www.securityfocus.com/archive/1/541824/100/0/threaded Third Party Advisory, VDB Entry ([email protected])
http://www.securityfocus.com/bid/103194 Third Party Advisory, VDB Entry ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1550214 Issue Tracking, Third Party Advisory ([email protected])
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/201805-12 Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20180626-0001/ Third Party Advisory ([email protected])
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us Third Party Advisory ([email protected])
https://www.synology.com/support/security/Synology_SA_18_13 Third Party Advisory ([email protected])
http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://support.ntp.org/bin/view/Main/NtpBug3415 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/541824/100/0/threaded Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/103194 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1550214 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201805-12 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20180626-0001/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.synology.com/support/security/Synology_SA_18_13 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For ntp's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.