CVE-2018-7184

Name: CVE-2018-7184
Creator: NVD / NIST
Published: 2018-03-06T20:29:01.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 8.86%

Last modified Jun 17, 2026

CVE-2018-7184 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 8.86% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

8.86%

94.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Ntp	Ntp	4.2.8	P10
Synology	Router Manager	1.1	—
Synology	Skynas	All versions	—
Synology	Virtual Diskstation Manager	All versions	—
Synology	Diskstation Manager	5.2	—
Synology	Diskstation Manager	6.0	—
Synology	Diskstation Manager	6.1	—
Synology	Vs960hd Firmware	All versions	—
Slackware	Slackware Linux	14.0	—
Slackware	Slackware Linux	14.1	—
Slackware	Slackware Linux	14.2	—
Canonical	Ubuntu Linux	14.04	—
Canonical	Ubuntu Linux	16.04	—
Canonical	Ubuntu Linux	17.10	—
Canonical	Ubuntu Linux	18.04	—
Netapp	Cloud Backup	All versions	—
Netapp	Steelstore Cloud Integrated Storage	All versions	—

References

http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.htmlThird Party Advisory, VDB Entry
http://support.ntp.org/bin/view/Main/NtpBug3453Third Party Advisory
http://www.securityfocus.com/archive/1/541824/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/103192Third 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_us
https://usn.ubuntu.com/3707-1/Third 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/NtpBug3453Third Party Advisory
http://www.securityfocus.com/archive/1/541824/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/103192Third 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_us
https://usn.ubuntu.com/3707-1/Third 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-2018-7184?

How severe is CVE-2018-7184?

Severity scoring for CVE-2018-7184 is pending analysis. The EPSS model estimates a 8.86% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7184?

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-2018-7184?

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

Scan your code now

Source: NVD / NIST