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Microsoft Windows DNS Server vulnerable to cache poisoning

Vulnerability Note VU#484649

Original Release Date: 2007-11-13 | Last Revised: 2007-11-13


The Microsoft Windows DNS Server is vulnerable to cache poisoning, which may allow a remote, unauthenticated attacker to cause a Windows DNS server to provide incorrect responses to DNS queries.


Microsoft Windows DNS Server is a service that provides DNS serving capabilities for Windows 2000 server and Windows Server 2003. For a DNS server to trust a reply to a DNS request, the reply must contain the correct client source port and address as well as an identifier known as the transaction ID. Windows DNS server uses a predictable transaction ID generator, which can allow DNS cache poisoning.


A remote, unauthenticated attacker may be able to poison the cache of a Windows DNS server. This can cause client machines that use the DNS server to be redirected to malicious domains as the result of an incorrect DNS response.


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This issue is addressed in Microsoft Security Bulletin MS07-062.

Vendor Information


Microsoft Corporation Affected

Updated:  November 13, 2007



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


This issue is addressed in Microsoft Security Bulletin MS07-062.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

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This vulnerability was reported by Microsoft, who in turn credit Alla Berzroutchko of Scanit and Amit Klein of Trusteer.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2007-3898
Severity Metric: 4.39
Date Public: 2007-11-13
Date First Published: 2007-11-13
Date Last Updated: 2007-11-13 19:32 UTC
Document Revision: 5

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