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Vulnerability record · CVE-2018-7183 · published 8 March 2018

CVE-2018-7183: Ntp out-of-bounds write vulnerability

Ntp · Ntp

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.

9.8 CVSS 3.0 Critical EPSS 10% · top 4.5% CWE-787 · Out-of-bounds write
9.8CVSS 3.0 base score, v2 7.5
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
22References
17 Jun 2026Last modified by NVD

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.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://support.ntp.org/bin/view/Main/NtpBug3414 Vendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_S Vendor Advisory
http://www.securityfocus.com/bid/103351 Third Party AdvisoryVDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc Third Party Advisory
https://security.gentoo.org/glsa/201805-12 Third 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_13 Third Party Advisory
http://support.ntp.org/bin/view/Main/NtpBug3414 Vendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_S Vendor Advisory
http://www.securityfocus.com/bid/103351 Third Party AdvisoryVDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc Third Party Advisory
https://security.gentoo.org/glsa/201805-12 Third 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_13 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-7183), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.