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Microsoft Internet Information Server (IIS) 4.0 contains a buffer overflow in the redirect function

Vulnerability Note VU#717748

Original Release Date: 2004-07-14 | Last Revised: 2004-07-14


There is a vulnerability in the redirect function of Microsoft's Internet Information Server (IIS) 4.0 that could allow an attacker to execute arbitrary code on an affected system.


Internet Information Server (IIS) is a web server available for the Microsoft Windows operating system. IIS provides a redirect function that is responsible for forwarding incoming HTTP requests to another page. There is a buffer overflow vulnerability in the way the redirect function validates the length of incoming requests. By sending a specially crafted message to an affected system, an attacker could trigger a buffer overflow and potentially execute code of the attacker's choice. For more information, please refer to Microsoft Security Bulletin MS04-021.

Note: According to the Microsoft Security Bulletin, only IIS 4.0 systems are affected.


A remote, unauthenticated attacker could execute arbitrary code on an affected system.


Apply a patch as described in Microsoft Security Bulletin MS04-021.

Vendor Information


Microsoft Corporation Affected

Updated:  July 14, 2004



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.


Please refer to Microsoft Security Bulletin MS04-021.

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.

This document was written by Damon Morda and based on information provided by Microsoft.

Other Information

CVE IDs: CVE-2004-0205
Severity Metric: 10.13
Date Public: 2004-07-13
Date First Published: 2004-07-14
Date Last Updated: 2004-07-14 15:09 UTC
Document Revision: 9

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