CVE-2018-14644

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-11-09 · updated 2026-06-17
Weakness: CWE-20

Description

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 through 4.1.4

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14644
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14644
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07.html

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