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CVE-2018-7184

27
FAUCET Score

CVE-2018-7184 describes a denial-of-service vulnerability in ntpd versions 4.2.8p4 through 4.2.8p10, affecting products from vendors like Canonical, NetApp, NTP, Slackware, and Synology. This flaw, an incomplete fix for CVE-2015-7704, allows a remote attacker to disrupt NTP service by sending specially crafted packets with a zero-origin timestamp, causing association resets. Rated with a CVSS v3.0 score of 7.5 (High), it requires no user interaction or privileges, but its impact is limited to availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p10:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p4:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p5:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p6:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.69%
Probability of exploitation in next 30 days
EPSS Percentile
94.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0869 is in the 91st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ntp

Vendor Advisories (1)

redhatCVE-2018-7184Low

ntp: Interleaved symmetric mode cannot recover from bad state

Feb 27, 2018

References

packetstormsecurity.com / files/146631/Slackware-Security-Advisory-ntp-Updates.html
Third Party AdvisoryVDB Entry
security.freebsd.org / advisories/FreeBSD-SA-18:02.ntp.asc
Third Party Advisory
security.gentoo.org / glsa/201805-12
Third Party Advisory
security.netapp.com / advisory/ntap-20180626-0001
Third Party Advisory
support.hpe.com / hpsc/doc/public/display
support.ntp.org / bin/view/Main/NtpBug3453
Third Party Advisory
usn.ubuntu.com / 3707-1
Third Party Advisory
synology.com / support/security/Synology_SA_18_13
Third Party Advisory
securityfocus.com / archive/1/541824/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / bid/103192
Third Party AdvisoryVDB Entry