CVE-2020-14312

Published: 06 February 2021

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.

Priority

Medium

CVSS 3 base score: 5.9

Status

Package Release Status
dnsmasq
Launchpad, Ubuntu, Debian
Upstream
Released (2.69-1)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(2.79-1)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(2.75-1ubuntu0.16.04.5)
Ubuntu 14.04 ESM (Trusty Tahr) Ignored