Microsoft Security Bulletin MS00-030

Patch Available for "Malformed Extension Data in URL" Vulnerability

Originally Posted: May 11, 2000

Summary

Microsoft has released a patch that eliminates a security vulnerability in Microsoft® Internet Information Server. The vulnerability could be used to slow the performance of an affected server, or temporarily stop it altogether.

Frequently asked questions regarding this vulnerability and the patch can be found at http://www.microsoft.com/technet/security/bulletin/fq00-030.mspx

General Information

Issue

Patch Availability

More Information

Please see the following references for more information related to this issue.

Frequently Asked Questions: Microsoft Security Bulletin MS00-030, http://www.microsoft.com/technet/security/bulletin/fq00-030.mspx
Microsoft Knowledge Base (KB) article 260205, HTTP request with large number of dots or dot/slashes can cause high CPU utilization, http://support.microsoft.com/default.aspx?scid=kb;en-us;260205
RFC 2396, Uniform Resource Identifiers (URI): Generic Syntax
Microsoft TechNet Security web site, http://www.microsoft.com/technet/security/default.mspx

Obtaining Support on this Issue

This is a fully supported patch. Information on contacting Microsoft Technical Support is available at http://support.microsoft.com/contactussupport/?ws=support.

Acknowledgments

Microsoft thanks Underground Security Systems Research - for reporting this vulnerability to us and working with us to protect customers.

Revisions

May 11, 2000: Bulletin Created.

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