CVE-2015-7975 Denial of service in n/a

Medium 6.2 Published 30 Jan 2017 Updated 6 Aug 2024

An attacker can cause a denial of service by sending malformed input to the NTP daemon, crashing the application.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2015-7975?

CVE-2015-7975 is a medium-severity denial of service vulnerability in Ntp Ntp, published on 30 Jan 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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).

Weakness: CWE-119

Which versions are affected by CVE-2015-7975?

It affects 1 product.

Products include Ntp Ntp.

How do I fix CVE-2015-7975?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2015-7975 being exploited?

There is no known exploitation of CVE-2015-7975 in the wild and no public exploit code.

All Ntp Ntp vulnerabilities

Sources

Also known as DEBIAN-CVE-2015-7975, GHSA-3x6c-8mj8-xj2q, UBUNTU-CVE-2015-7975.