Security Exception only in Hosting server

[Nimesha]

I am using telerik v2010.2.713.40. 

The site runs with no errors locally, but when deployed in the hosting server I get the below error. The thing is, the error disappears when the page gets refreshed and works fine thereafter. Then again randomly the error will appear, and refreshing the page will do the trick again. The hosting company confirmed that they run the site on Medium trust environment, so I had updated the pages to work on a Medium Trust environment (inheriting from  System.Web.UI.Page, Telerik.Web.UI.IRadAjaxPage and overriding the rendering methods ). Some of other functions does not work as desired , and I think this might be the reason for it. Any help to sort this out will b highly appreciated. Thanks.

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 failed.

Source Error: 

Line 6: </asp:Content> Line 7: <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server"> Line 8: <telerik:RadScriptManager ID="ScriptManager" runat="server" /> Line 9: <telerik:RadCodeBlock ID="RadCodeBlock1" runat="server"> Line 10: <script type="text/javascript">

Source File: d:\inetpub\vhosts\xyz.com.au\httpsdocs\ClientDashBoard.aspx    Line: 8 

Stack Trace: 

[SecurityException: Request failed.] System.Security.CodeAccessSecurityEngine.ThrowSecurityException(RuntimeAssembly asm, PermissionSet granted, PermissionSet refused, RuntimeMethodHandleInternal rmh, SecurityAction action, Object demand, IPermission permThatFailed) +168 System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Object assemblyOrString, PermissionSet granted, PermissionSet refused, RuntimeMethodHandleInternal rmh, SecurityAction action, Object demand, IPermission permThatFailed) +100 System.Security.CodeAccessSecurityEngine.CheckSetHelper(PermissionSet grants, PermissionSet refused, PermissionSet demands, RuntimeMethodHandleInternal rmh, Object assemblyOrString, SecurityAction action, Boolean throwException) +278 System.Security.CodeAccessSecurityEngine.CheckSetHelper(CompressedStack cs, PermissionSet grants, PermissionSet refused, PermissionSet demands, RuntimeMethodHandleInternal rmh, RuntimeAssembly asm, SecurityAction action) +70 System.RuntimeMethodHandle.CheckLinktimeDemands(IRuntimeMethodInfo method, RuntimeModule module, Boolean isDecoratedTargetSecurityTransparent) +0 System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent) +482 System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType) +103 System.Reflection.RuntimeAssembly.GetCustomAttributes(Boolean inherit) +33 System.Web.UI.AssemblyCache.GetAjaxFrameworkAssemblyAttribute(Assembly assembly) +62 System.Web.UI.ScriptManager.get_DefaultAjaxFrameworkAssembly() +272 System.Web.UI.ScriptManager..ctor() +11 Telerik.Web.UI.RadScriptManager..ctor() +15 ASP.clientdashboard_aspx.__BuildControlScriptManager() in d:\inetpub\vhosts\fetchpetcompany.com.au\httpsdocs\ClientDashBoard.aspx:8 ASP.clientdashboard_aspx.__BuildControlContent2(Control __ctrl) in d:\inetpub\vhosts\fetchpetcompany.com.au\httpsdocs\ClientDashBoard.aspx:7 System.Web.UI.CompiledTemplateBuilder.InstantiateIn(Control container) +12 System.Web.UI.MasterPage.InstantiateInContentPlaceHolder(Control contentPlaceHolder, ITemplate template) +87 ASP.clientmaster_master.__BuildControlContentPlaceHolder1() in d:\inetpub\vhosts\fetchpetcompany.com.au\httpsdocs\ClientMaster.master:65 ASP.clientmaster_master.__BuildControlform1() in d:\inetpub\vhosts\fetchpetcompany.com.au\httpsdocs\ClientMaster.master:13 ASP.clientmaster_master.__BuildControlTree(clientmaster_master __ctrl) in d:\inetpub\vhosts\fetchpetcompany.com.au\httpsdocs\ClientMaster.master:1 ASP.clientmaster_master.FrameworkInitialize() in App_Web_clientmaster.master.cdcab7d2.07nip1fo.0.cs:0 System.Web.UI.UserControl.InitializeAsUserControlInternal() +35 System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection) +8836530 System.Web.UI.Page.get_Master() +54 System.Web.UI.Page.ApplyMasterPage() +15 System.Web.UI.Page.PerformPreInit() +45 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +8431 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +253 System.Web.UI.Page.ProcessRequest() +78 System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21 System.Web.UI.Page.ProcessRequest(HttpContext context) +49 ASP.clientdashboard_aspx.ProcessRequest(HttpContext context) in App_Web_clientdashboard.aspx.cdcab7d2.trsd0rpx.0.cs:0 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +100 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

---

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1

[Georgi Tunev]

Hello Nimesha,

I believe that the following forum thread will be of help:
http://www.telerik.com/community/forums/aspnet/general-discussions/description-the-application-attempted-to-perform-an-operation-not-allowed-by-the-security-policy-to-grant-this-application-the-required-permission-ple.aspx


Regards,
Georgi Tunev
the Telerik team

[Tyree]

Did you ever get this cleared up? I am experiencing the exact same symptoms.

[Nimesha]

Hi Tyree,

Unfortunately, the answer is No. I could not resolve it on the same hosting provider. I moved to another hosting provider (I think they have less restrictions on security so it resolved my issue) and the issue was not replicating in their hosting space. 

Hope you will find a solution to your issue. I know it is quite frustrating :).

Regards,
Nimesha