CVE-2015-7975

Publication date 31 December 2015

Last updated 25 August 2025

Ubuntu priority

Negligible

Why this priority?

Cvss 3 Severity Score

6.2 · Medium

Score breakdown

Description

The nextvar function in NTP before 4.2.8p6 and 4.3.x before 4.3.90 does not properly validate the length of its input, which allows an attacker to cause a denial of service (application crash).

Read the notes from the security team

Status

Package Ubuntu Release Status
ntp 16.04 LTS xenial
Fixed 1:4.2.8p4+dfsg-3ubuntu5.3
15.10 wily
Not affected
15.04 vivid Ignored end of life
14.04 LTS trusty
Not affected
12.04 LTS precise
Not affected

Notes

mdeslaur

introduced in 4.2.8 by https://github.com/ntp-project/ntp/commit/be565bf3c6a5badd4a6ce2f336476d1e1dd98915

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

References

Related Ubuntu Security Notices (USN)

Other references