CVE-2009-0234
The DNS Resolver Cache Service (aka DNSCache) in Windows DNS Server in Microsoft Windows 2000 SP4...
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."
Exploit likelihood
What each source reports
NVD Score used
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."
- Record
CVE-2009-0234- CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:P - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
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."
- Record
CVE-2009-0234- Updated
- 2026-11-02
EUVDEUVD-2009-0242 No score
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."
- Record
EUVD-2009-0242- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qm9g-82c2-4282 No score
The DNS Resolver Cache Service (aka DNSCache) in Windows DNS Server in Microsoft Windows 2000 SP4...
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."
- Record
GHSA-qm9g-82c2-4282- Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-0234 is a medium vulnerability (CVSS 6.4) in Microsoft Windows 2000, published March 11, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 34.4%, the 98th percentile. No source names a fixed version.
References
us-cert.gov/cas/techalerts/TA09-069A.html
vupen.com/english/advisories/2009/0661
secunia.com/advisories/34217
kb.cert.org/vuls/id/319331
osvdb.org/52518
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5715
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support.avaya.com/elmodocs2/security/ASA-2009-083.htm
securityfocus.com/bid/33988
docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-008
securitytracker.com/id?1021831
blogs.technet.com/srd/archive/2009/03/13/ms09-008-dns-and-wins-server-security-update-in-more-detail.aspx
nvd.nist.gov/vuln/detail/CVE-2009-0234
github.com/advisories/GHSA-qm9g-82c2-4282