CVE-2018-14644: Powerdns Recursor

Medium severity, CVSS 5.9. EPSS: 4.8% chance of exploitation in the next 30 days.

An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. A remote attacker sending a DNS query for a meta-type like OPT can lead to a zone being wrongly cached as failing DNSSEC validation. It only arises if the parent zone is signed, and all the authoritative servers for that parent zone answer with FORMERR to a query for at least one of the meta-types. As a result, subsequent queries from clients requesting DNSSEC validation will be answered with a ServFail.

Affected products

• Powerdns Recursor: from 4.0.0, up to and including 4.1.4

Published 2018-11-09. Last modified 2026-06-17.