CVE-2018-7185

Name: CVE-2018-7185
Creator: NVD / NIST
Published: 2018-03-06T20:29:01.5+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 9.24%

Last modified Jun 17, 2026

CVE-2018-7185 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 9.24% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

9.24%

94.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Ntp	Ntp	>= 4.2.6, < 4.2.8
Ntp	Ntp	4.2.8
Synology	Router Manager	>= 1.1, < 1.1.6-6931-3
Synology	Skynas	< 6.1.5-15254
Synology	Virtual Diskstation Manager	< 6.1.6-15266
Synology	Diskstation Manager	>= 5.2, < 6.1.6-15266
Synology	Vs960hd Firmware	< 2.2.3-1505
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10
Canonical	Ubuntu Linux	18.04
Netapp	Hci	All versions
Netapp	Solidfire	All versions
Hpe	Hpux-Ntp	< c.4.2.8.4.0
Oracle	Fujitsu M10-1 Firmware	< xcp2361
Oracle	Fujitsu M10-4 Firmware	< xcp2361
Oracle	Fujitsu M10-4s Firmware	< xcp2361
Oracle	Fujitsu M12-1 Firmware	< xcp2361
Oracle	Fujitsu M12-2 Firmware	< xcp2361
Oracle	Fujitsu M12-2s Firmware	< xcp2361
Oracle	Fujitsu M10-1 Firmware	< xcp3070
Oracle	Fujitsu M10-4 Firmware	< xcp3070
Oracle	Fujitsu M10-4s Firmware	< xcp3070
Oracle	Fujitsu M12-1 Firmware	< xcp3070
Oracle	Fujitsu M12-2 Firmware	< xcp3070
Oracle	Fujitsu M12-2s Firmware	< xcp3070

References

http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.htmlThird Party Advisory, VDB Entry
http://support.ntp.org/bin/view/Main/NtpBug3454Mitigation, Vendor Advisory
http://www.securityfocus.com/archive/1/541824/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/103339Third Party Advisory, VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.ascThird Party Advisory
https://security.gentoo.org/glsa/201805-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20180626-0001/Third Party Advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_usThird Party Advisory
https://usn.ubuntu.com/3707-1/Third Party Advisory
https://usn.ubuntu.com/3707-2/Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlThird Party Advisory
https://www.synology.com/support/security/Synology_SA_18_13Third Party Advisory
http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.htmlThird Party Advisory, VDB Entry
http://support.ntp.org/bin/view/Main/NtpBug3454Mitigation, Vendor Advisory
http://www.securityfocus.com/archive/1/541824/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/103339Third Party Advisory, VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.ascThird Party Advisory
https://security.gentoo.org/glsa/201805-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20180626-0001/Third Party Advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_usThird Party Advisory
https://usn.ubuntu.com/3707-1/Third Party Advisory
https://usn.ubuntu.com/3707-2/Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlThird Party Advisory
https://www.synology.com/support/security/Synology_SA_18_13Third Party Advisory

Timeline

Published: Mar 6, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7185?

How severe is CVE-2018-7185?

CVE-2018-7185 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 9.24% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7185?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-7185?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST