CVE-2016-9310

Publication date 13 January 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The control mode (mode 6) functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to set or unset traps via a crafted control mode packet.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ntp	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Not affected
	16.10 yakkety	Fixed in 1:4.2.8p8+dfsg-1ubuntu2.1
	16.04 LTS xenial	Fixed in 1:4.2.8p4+dfsg-3ubuntu5.5
	14.04 LTS trusty	Fixed in 1:4.2.6.p5+dfsg-3ubuntu2.14.04.11
	12.04 LTS precise	Ignored end of life

Patch details

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

Package	Patch details
ntp	Vendor: https://git.centos.org/blob/rpms!ntp.git/4eb1db127a6177011bd913bf4f446e8f701179d6/SOURCES!ntp-4.2.6p5-cve-2016-9310.patch Upstream: http://bk1.ntp.org/ntp-stable/?PAGE=cset&REV=57e6c819rh2svWsjdM59G3nj_eyKew

Severity score breakdown

CVSS version: CVSS v3.0

Base score 6.5 · Medium

Base metrics

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

Scores

Parameter	Value
Base score	6.5 · Medium
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-3707-2
NTP vulnerabilities
23 January 2019

USN-3349-1
NTP vulnerabilities
5 July 2017