CVE-2020-25681

Published: 19 January 2021

A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Priority

Medium

CVSS 3 base score: 8.1

Status

Package Release Status
dnsmasq
Launchpad, Ubuntu, Debian
Upstream
Released (2.83)
Ubuntu 21.10 (Impish Indri)
Released (2.82-1ubuntu2)
Ubuntu 21.04 (Hirsute Hippo)
Released (2.82-1ubuntu2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (2.80-1.1ubuntu1.2)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (2.79-1ubuntu0.2)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (2.75-1ubuntu0.16.04.7)
Ubuntu 14.04 ESM (Trusty Tahr) Needs triage