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Friday, February 10, 2012

How Good/Bad Windows Updates can be...


A recent security update “Microsoft Security Bulletin MS11-100 - Critical” from Microsoft made our asp.net application (some pages) to crash which is hosted on IIS Server running on Windows Server 2008.

Following are the error messages from the log:
1.       Operation is not valid due to the current state of the object.
2.       The URL-encoded form data is not valid.

The two strange error messages made me busy for the next half an hour. After some research I came to know that the server had undergone a critical security update. Though, it is common for the server to auto update windows features.. this time there was a critical security update which involves all versions of .Net framework.

We tried to add new appSetting Key/Value in web config file to fix the issue.

<add key="aspnet:MaxHttpCollectionKeys" value="2001"/>
MS Windows auto update feature is good which keeps your system up to date. However, the latest security update created a technical glitch.

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