This post originated from an RSS feed registered with .NET Buzz by Sascha Corti. Original Post: ASP.NET Developers: Harden your Web Applications! Feed Title: Console.WriteLine("Hello World"); Feed URL: http://www.corti.com/WebLogSascha/blogxbrowsing.asmx/GetRss? Feed Description: A technology blog with a focus on the .NET framework, the Visual Studio .NET tools and the Windows server platform with of course the normal weblog-noise on what's happening in the industry and reviews of the latest geeky gadgets. Latest .NET Buzz Posts Latest .NET Buzz Posts by Sascha Corti Latest Posts From Console.WriteLine("Hello World");

If you develop ASP.NET applications, you should have a look at the following two resources and harden your apps accordingly.

What You Should Know About a Reported Vulnerability in Microsoft ASP.NET: http://www.microsoft.com/security/incident/aspnet.mspx
Programmatically check for canonicalization issues with ASP.NET: http://support.microsoft.com/?kbid=887459

I suggest adding the mentioned code to your global.asax files of each of your web apps asap...