Does Security Trimming Work With Web Forms Routing?
May 31, 2010
In my web.config I have configured a SiteMapProvider with securityTrimmingEnabled="true" and on my main master page is an asp:Menu control bound to an asp:SiteMapDataSource. In addition I have configured restricted access to all pages in a subfolder "Admin" (using another web.config in this subfolder).
If I put a sitemapNode in Web.sitemap...
<siteMapNode url="~/Admin/Default.aspx" title="Administration" description="" >
... only users in role "Admin" will have the menu item related to that siteMapNode. So this is working fine and as intended.
Now I have defined a URL route in Global.asax to map the physical file to a new URL:
System.Web.Routing.RouteTable.Routes.MapPageRoute("AdminHomeRoute",
"Administration/Home", "~/Admin/Default.aspx");
But when I use this route-URL in the SiteMap file...
<siteMapNode url="Administration/Home" title="Administration" description="" >
... it seems that security trimming does not work: The menu item is visible for all users. (Access to the page is still restricted though, so selecting the menu item by non-Admin users does not navigate to the restricted page.)
Question: Is there any setting I've missed so far to make security trimming working with URL routing in ASP.NET 4.0 Web Forms? Did I do something wrong? Is there any work-around?
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[Code]....
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[Code]....
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[URL]
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Server Error in '/testapp' Application.
Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
[Code]....
Stack Trace:
[Code]....
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
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i was told that only Stackoverflow geniuses will answer this question.
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[Code]....
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This question is somewhat of a follow up to How serious is this new ASP.NET security vulnerability and how can I workaround it? So if my question seems to be broken read over this question and its accepted solution first and then take that into the context of my question.Can someone explain why returning the same error page and same status code for custom errors matters? I find this to be immaterial especially if this is advocated as part of the work around to it.Isn't it just as easy for the script/application to execute this attack and not specifically care whether or not it gets a http status code and more on the outcome? Ie doing this 4000 times you get redirected to an error page where on 4001 you stay on the same page because it didn't invalidate the padding?
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The cipher key from the WebResoure.axd / ScriptResource.axd is taken and the first guess of the validation key is used to generate a value of potential key with the ciphered text.This value is passed to the WebResource.axd / ScriptResource.axd at this point if the decryption key was guessed correctly their response will be accepted but since the data is garbage that it's looking for the WebResource.axd / ScriptResource.axd will return a 404 error.If the decryption key was not successfully guessed it will get a 500 error for the padding invalid exception. At this point the attack application knows to increment the potential decryption key value and try again repeating until it finds the first successful 404 from the WebResource.axd / ScriptResource.axd
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