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Memory Leak if Large File Upload Is Cancelled Prematurely

Article ID: 197377 - View products that this article applies to.

This article was previously published under Q197377

We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 7.0 running on Microsoft Windows Server 2008. IIS 7.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx

(http://www.microsoft.com/technet/security/prodtech/IIS.mspx)

For more information about IIS 7.0, visit the following Microsoft Web site:

http://www.iis.net/default.aspx?tabid=1

(http://www.iis.net/default.aspx?tabid=1)

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SYMPTOMS

If you use Request for Comment (RFC) 1867 to upload a large file to an Active Server Page (ASP) and the transfer procedure is terminated prematurely by the client, a memory leak the size of the file occurs. For example, if you are uploading a 10 megabyte (MB) file and then disconnect before the file is completely uploaded, the memory leak is 10MB. Note that the ASP page calls Request.BinaryRead.

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RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734

(http://support.microsoft.com/kb/152734/EN-US/ )

How to Obtain the Latest Windows NT 4.0 Service Pack

NOTE: You must install SP4 before installing this fix.

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STATUS

Microsoft has confirmed this to be a problem in Microsoft Internet Information Server version 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 5.

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