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CVE-2018-7183

36
FAUCET Score

CVE-2018-7183 is a critical buffer overflow vulnerability in the ntpq utility within NTP versions 4.2.8p6 through 4.2.8p10, affecting products from vendors like Canonical, FreeBSD, and NetApp. This vulnerability allows remote attackers to execute arbitrary code by sending a crafted array in response to an ntpq query. With a CVSS score of 9.8 (Critical), it has a low attack complexity and requires no user interaction, leading to high impacts on confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or inclusion in the KEV catalog, the vulnerability has garnered significant community discussion.

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:p6:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p8:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p9:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
10.40%
Probability of exploitation in next 30 days
EPSS Percentile
95.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.1040 is in the 91st percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ntp

Vendor Advisories (1)

redhatCVE-2018-7183Moderate

ntp: decodearr() can write beyond its buffer limit

Feb 27, 2018

References

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/NtpBug3414
Vendor Advisory
support.ntp.org / bin/view/Main/SecurityNotice
Vendor Advisory
usn.ubuntu.com / 3707-1
Third Party Advisory
usn.ubuntu.com / 3707-2
Third Party Advisory
oracle.com / /security-alerts/cpujul2021.html
synology.com / support/security/Synology_SA_18_13
Third Party Advisory
securityfocus.com / bid/103351
Third Party AdvisoryVDB Entry