CVE-2020-14312 Misconfiguration in dnsmasq

What is CVE-2020-14312?

CVE-2020-14312 is a medium-severity vulnerability in Fedoraproject Fedora, published on 5 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions Red Hat Enterprise Linux, where it listens on any interface and accepts queries from addresses outside of its local subnet. In particular, the option `local-service` is not enabled. Running dnsmasq in this manner may inadvertently make it an open resolver accessible from any address on the internet. This flaw allows an attacker to conduct a Distributed Denial of Service (DDoS) against other systems.

Weakness: CWE-284

Which versions are affected by CVE-2020-14312?

It affects 1 product.

Products include Fedoraproject Fedora.

How do I fix CVE-2020-14312?

Change a configuration setting.

Is CVE-2020-14312 being exploited?

There is no known exploitation of CVE-2020-14312 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-14312, GHSA-xr95-5hhj-crp6, MGASA-2020-0310, OESA-2022-1821, UBUNTU-CVE-2020-14312, openSUSE-SU-2024:11653-1.