CVE-2016-7434

Publication date 13 January 2017

Last updated 25 August 2025

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

The read_mru_list function in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (crash) via a crafted mrulist query.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ntp	17.04 zesty	Not affected
	16.10 yakkety	Fixed 1:4.2.8p8+dfsg-1ubuntu2.1
	16.04 LTS xenial	Fixed 1:4.2.8p4+dfsg-3ubuntu5.5
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Not affected

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://bk1.ntp.org/ntp-stable/?PAGE=cset&REV=577c2368SYIYqejizygC-8LgXTNcGQ

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

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

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3349-1
NTP vulnerabilities
5 July 2017

Other references

https://www.cve.org/CVERecord?id=CVE-2016-7434

Access our resources on patching vulnerabilities