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Re: ASP.NET cannonicalization issue
From: Jelson Pat <australia001 () yahoo com au>
Date: Fri, 8 Oct 2004 07:52:37 +1000 (EST)

more technical details :

"Evans, Arian" <Arian.Evans () fishnetsecurity com> wrote: 
Hadn't seen this on the lists yet:

Cannonicalization issue in ASP.NET

Microsoft is currently investigating a reported
vulnerability in Microsoft ASP.NET. An attacker
can send specially crafted requests to the server
and view secured content without providing the
proper credentials. This reported vulnerability
exists in ASP.NET and does not affect ASP.


Their interim "fix" is to add an event handler to
force real path validation for all requests:


Which is certainly not a bad idea but methinks
another performance/security tradeoff at hand.

Thanks for the heads-up Daniel...

Arian Evans
Sr. Security Engineer
FishNet Security

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