There is a vulnerability in the way ASP.NET validates real files to virtual files when Authentication is used. Read more about the problem and download the new [i]HttpModule[\i] to address the problem.
http://www.microsoft.com/security/incident/aspnet.mspx
Some additional ASP.NET resources previously published on Builder:
[b]Using the ASP.NET Calendar control[/b]
http://builder.com.com/5100-6373_14-5319954.html
[b]Limiting the size of ASP.NET ViewState to improve performance[/b]
http://builder.com.com/5100-6373_14-5229520.html
[i]A post from Robert McLaws – Interscape Technologies, Inc.[/i]