CVE-2018-7183

Publication date 8 March 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ntp	18.10 cosmic	Fixed in 1:4.2.8p11+dfsg-1ubuntu1
	18.04 LTS bionic	Fixed in 1:4.2.8p10+dfsg-5ubuntu7.1
	17.10 artful	Fixed in 1:4.2.8p10+dfsg-5ubuntu3.3
	16.04 LTS xenial	Fixed in 1:4.2.8p4+dfsg-3ubuntu5.9
	14.04 LTS trusty	Fixed in 1:4.2.6.p5+dfsg-3ubuntu2.14.04.13

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
ntp	Upstream: http://bk.ntp.org/ntp-stable/?PAGE=cset&REV=59600eacHNF0J6NIJgOKyMHSraP_WQ

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	9.8 · Critical
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-3707-1
NTP vulnerabilities
9 July 2018

USN-3707-2
NTP vulnerabilities
23 January 2019