CVE-2018-7185

Publication date 6 March 2018

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the "other side" of an interleaved association causing the victim ntpd to reset its association.

Status

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

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
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)

Other references