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URL Rewrite 2.0 leaks memory when an outgoing rule is processed against a multivalue server variable

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When an outgoing rule is processed against a multivalue server variable, Internet Information Services (IIS) URL Rewrite 2.0 may leak memory. This problem occurs if the rule does not match all the values of the variable. For example, if there is an outgoing rule that changes a specific cookie in the Set-Cookie: header when there are multiple cookies set on a response, URL Rewrite may leak memory on each request in which the outgoing rule occurs.

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This problem occurs because of an error in URL Rewrite 2.0.

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Hotfix information

The following file is available for download from the Microsoft Download Center:

Learn about how to obtain Microsoft support files from online services


There are no prerequisites for installing this hotfix.

Restart information

You must restart the computer after you apply this hotfix.

Replacement information

This hotfix does not replace any previously released hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

For all supported x86-based versions of IIS URL Rewrite 2.0
File nameFile versionFile sizeDateTimePlatform
For all supported x64-based versions of IIS URL Rewrite 2.0
File nameFile versionFile sizeDateTimePlatform

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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Learn about the terminology that Microsoft uses to describe software updates.

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Keywords: kbbug, kbsurveynew, kbexpertiseinter, kbautohotfix, kbhotfixserver, kbqfe, kb, kbfix

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Article Info
Article ID : 2974666
Revision : 1
Created on : 1/7/2017
Published on : 6/12/2014
Exists online : False
Views : 202