CVE-2016-7427

Publication date 13 January 2017

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The broadcast mode replay prevention functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet.

Read the notes from the security team

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 1:4.2.8p8+dfsg-1ubuntu2.1
	16.04 LTS xenial	Fixed 1:4.2.8p4+dfsg-3ubuntu5.5
	14.04 LTS trusty	Fixed 1:4.2.6.p5+dfsg-3ubuntu2.14.04.11
	12.04 LTS precise	Ignored

Notes

mdeslaur

ntp-4.2.8p6, up to but not including ntp-4.2.8p9, and ntp-4.3.90 up to, but not including ntp-4.3.94. introduced with CVE-2015-7973 patch

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=58090954cV4QaVXVunDIzKXbBc3TVA Upstream: http://bk1.ntp.org/ntp-stable/?PAGE=cset&REV=58231747JiKHtC3fkyDJMMO7wMjfSA

Severity score breakdown

Parameter	Value
Base score	4.3 · Medium
Attack vector	Adjacent
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L