CVE-2014-0021 Denial of service in Chrony
Attackers can exploit traffic amplification in the Chrony cmdmon protocol to cause denial of service against NTP servers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2014-0021?
CVE-2014-0021 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 15 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Chrony before 1.29.1 has traffic amplification in cmdmon protocol
Which versions are affected by CVE-2014-0021?
It affects 3 products.
Products include Chrony Project Chrony, Debian Debian Linux, Fedoraproject Fedora.
How do I fix CVE-2014-0021?
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-2014-0021 being exploited?
There is no known exploitation of CVE-2014-0021 in the wild and no public exploit code.
Sources
Also known as AZL-110379, DEBIAN-CVE-2014-0021, GHSA-4xjv-r88q-f87j, MGASA-2014-0052, UBUNTU-CVE-2014-0021.