CVE-2015-7979 Denial of service in n/a

High 7.5 Published 30 Jan 2017 Updated 6 Aug 2024

Remote attackers can cause denial of service in NTP broadcast clients by sending invalid authenticated broadcast packets, requiring broadcast mode configuration.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2015-7979?

CVE-2015-7979 is a high-severity denial of service vulnerability in Ntp Ntp, published on 30 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (client-server association tear down) by sending broadcast packets with invalid authentication to a broadcast client.

Weakness: CWE-19

Which versions are affected by CVE-2015-7979?

It affects 1 product.

Products include Ntp Ntp.

How do I fix CVE-2015-7979?

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-2015-7979 being exploited?

There is no known exploitation of CVE-2015-7979 in the wild and no public exploit code.

All Ntp Ntp vulnerabilities

Sources

Also known as DEBIAN-CVE-2015-7979, GHSA-9fqj-9gp8-4rwc, UBUNTU-CVE-2015-7979.