# CVE-2018-14644: pdns-recursor: An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4

CVE-2018-14644 is fixed in pdns-recursor on 1 platform by pdns-recursor 4.1.1-2ubuntu0.1~esm1 (version 4.1.1-2ubuntu0.1~esm1), released March 25, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-14644
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0484
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 9, 2018

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pdns-recursor Ubuntu 18.04.6 LTS (bionic) | 4.1.1-2ubuntu0.1~esm1 | [pdns-recursor 4.1.1-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-pdns-recursor-4.1.1-2ubuntu0.1-esm1.md) | Mar 25, 2022 |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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