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Date: Fri, 30 Mar 2007 18:58:50 -0400
From: "Michael Sutton" <msutton@...dynamics.com>
To: "Chris Weber" <chris@...kout.net>,
	"pdp \(architect\)" <pdp.gnucitizen@...glemail.com>,
	<full-disclosure@...ts.grok.org.uk>,
	"WASC Forum" <websecurity@...appsec.org>,
	"webappsec @OWASP" <webappsec@...ts.owasp.org>
Subject: Re: [WEB SECURITY] Preventing Cross-site Request
	Forgeries [ASP.NET crowd]

The EnableEventValidation page directive (enabled by default since .Net
2.0) applies a nonce value for form validation and is also a strong
control to prevent CSRF attacks. 

Michael Sutton
Security Evangelist
SPI Dynamics
http://portal.spidynamics.com/blogs/msutton

> -----Original Message-----
> From: Chris Weber [mailto:chris@...kout.net]
> Sent: Friday, March 30, 2007 6:12 PM
> To: 'pdp (architect)'; full-disclosure@...ts.grok.org.uk; 'WASC
Forum';
> 'webappsec @OWASP'
> Subject: RE: [WEB SECURITY] Preventing Cross-site Request Forgeries
> [ASP.NET crowd]
> 
> Nice article.
> 
> For the ASP.NET crowd out there, the will be even more simple, one
line of
> code.  Set the ViewStateUserKey property in your base class or page
and
> the
> unique token protections (similar to CSRF_Guard) will be provided for
you.
> 
> http://msdn2.microsoft.com/en-
> us/library/system.web.ui.page.viewstateuserkey
> .aspx
> 
> This protection mechanism has been available for many years, since the
> Framework 1.1
> 
> 
> 
> 
> 
> -----Original Message-----
> From: pdp (architect) [mailto:pdp.gnucitizen@...glemail.com]
> Sent: Friday, March 30, 2007 3:16 AM
> To: full-disclosure@...ts.grok.org.uk; WASC Forum; webappsec @OWASP
> Subject: [WEB SECURITY] Preventing Cross-site Request Forgeries
> 
> http://www.gnucitizen.org/blog/preventing-csrf
> 
> I briefly covered how simple it is to prevent CSRF attacks. Hope that
you
> find it useful.
> 
> --
> pdp (architect) | petko d. petkov
> http://www.gnucitizen.org
> 
>
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