HOMEVULNERABILITIESCVE-2018-7183
CRITICAL

CVE-2018-7183

CWE-787Published: March 8, 2018· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Buffer overflow in the decodearr function in ntpq in ntp 4.2.8p6 through 4.2.8p10 allows remote attackers to execute arbitrary code by leveraging an ntpq query and sending a response with a crafted array.

NVD Source

Technical Analysis

CVE-2018-7183 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
freebsd1 product(s)
freebsd
netapp1 product(s)
element software
ntp1 product(s)
ntp
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://support.ntp.org/bin/view/Main/NtpBug3414
ADVISORYhttp://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_S
ADVISORYhttp://www.securityfocus.com/bid/103351
ADVISORYhttps://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc
ADVISORYhttps://security.gentoo.org/glsa/201805-12
ADVISORYhttps://security.netapp.com/advisory/ntap-20180626-0001/
ADVISORYhttps://usn.ubuntu.com/3707-1/
ADVISORYhttps://usn.ubuntu.com/3707-2/
ADVISORYhttps://www.synology.com/support/security/Synology_SA_18_13
ADVISORYhttp://support.ntp.org/bin/view/Main/NtpBug3414
ADVISORYhttp://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_S
ADVISORYhttp://www.securityfocus.com/bid/103351
ADVISORYhttps://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc
ADVISORYhttps://security.gentoo.org/glsa/201805-12
ADVISORYhttps://security.netapp.com/advisory/ntap-20180626-0001/
ADVISORYhttps://usn.ubuntu.com/3707-1/
ADVISORYhttps://usn.ubuntu.com/3707-2/
ADVISORYhttps://www.synology.com/support/security/Synology_SA_18_13

All References (22)

→
http://support.ntp.org/bin/view/Main/NtpBug3414Vendor Advisory
→
http://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_SVendor Advisory
→
http://www.securityfocus.com/bid/103351Third 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://usn.ubuntu.com/3707-2/Third Party Advisory
→
https://www.oracle.com//security-alerts/cpujul2021.html
→
https://www.synology.com/support/security/Synology_SA_18_13Third Party Advisory
→
http://support.ntp.org/bin/view/Main/NtpBug3414Vendor Advisory
→
http://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_SVendor Advisory
→
http://www.securityfocus.com/bid/103351Third Party Advisory · VDB Entry
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.ascThird Party Advisory

Quick Facts

CVE IDCVE-2018-7183
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-787
CISA KEVNo
Affected4 vendor(s)
PublishedMar 8, 2018

Related CVEs (CWE-787)

CVE-2026-4746
10.0
CVE-2026-42369
10.0
CVE-2004-0574
10.0
CVE-2018-10718
10.0
CVE-2009-2466
10.0
CVE-2002-2227
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-7183 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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