CVE-2015-8138

Publication date 31 December 2015

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

Description

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero.

Read the notes from the security team

Status

Package Ubuntu Release Status
ntp 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Fixed 1:4.2.8p4+dfsg-3ubuntu5.3
15.10 wily Ignored end of life
15.04 vivid Ignored end of life
14.04 LTS trusty
Fixed 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10
12.04 LTS precise
Fixed 1:4.2.6.p3+dfsg-1ubuntu3.11

Notes

mdeslaur

fix may be incomplete because of fix for CVE-2015-7704 http://lists.ntp.org/pipermail/hackers/2016-January/007406.html http://lists.ntp.org/pipermail/hackers/2016-January/007416.html Ubuntu and Debian use Fedora's fix for CVE-2015-7704, so this one isn't incomplete.

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

References

Related Ubuntu Security Notices (USN)

Other references