PRB: SecurityException for System.Web.AspNetHostingPermission when using UNC path
Monday, 25 June 2007
The following exception appears when opening the website: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
SYMPTOMS
The following exception appears when opening the website.
Security Exception
Description: The application attempted to perform an operation not allowed by the
security policy. To grant this application the required permission please
contact your system administrator or change the application's trust level in the
configuration file.
Exception Details:
System.Security.SecurityException:
Request for the permission of type 'System.Web.AspNetHostingPermission,
System, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089'
failed.
Source Error:
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An unhandled exception was generated during
the execution of the current web request. Information regarding the origin and location
of the exception can be identified using the exception stack trace below.
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Stack Trace:
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[SecurityException: Request for the permission
of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
System.Reflection.Assembly.GetType(String
name, Boolean throwOnError, Boolean ignoreCase) +0
System.Web.UI.Util.GetTypeFromAssemblies(ICollection
assemblies, String typeName, Boolean ignoreCase) +140
System.Web.UI.TemplateParser.GetType(String
typeName, Boolean ignoreCase, Boolean throwOnError) +295
System.Web.UI.TemplateParser.ProcessInheritsAttribute(String
baseTypeName, String codeFileBaseTypeName, String src, Assembly assembly) +163
System.Web.UI.TemplateParser.PostProcessMainDirectiveAttributes(IDictionary
parseData) +192
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Version Information: Microsoft .NET Framework Version:2.0.50727.42;
ASP.NET Version:2.0.50727.210
CAUSE
This problem appears when the website home directory is an UNC path. In this case
the code in the website does not have access rights to dynamically load .NET types.
For example the method System.Reflection.Assembly.GetType cannot
be used in this case. The specific error appears when an .aspx or .ascx page uses
the
Inherits attribute to change its base class.
RESOLUTION
You can use one of these methods to resolve the issue
Map the shared folder as a Network Drive
The Home Directory needs to be a directory located on web server computer, not a
UNC name ( or a share located
on another comptuer). A workaround is to map the shared folder as a network drive
and then use in the form of Drive Letter:\
Set the shared folder as trusted location
The network share can be granted full trust by using the .NET CASPOL tool or the
Microsoft .NET Framework Configuration utility( mscorcfg.msc ).
For more information see:
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