c# - Strange webserver exception after patching web farm -


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We have recently compromised our 12 servers, now that the following URLs were being executed across all servers killing the same URL as this Is ... (URL has been modified)

  System. Web. HTTP Exception - Invalid viewstate   

Stack trace:

 System.Web.Handlers.AssemblyResourceLoader on System.Web.UI.Page.DecryptStringWithIV (string, IVType ivType ) On . System.Web.IHttpHandler.ProcessRequest (HttpContext Reference) System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute () System.Web.HttpApplication.ExecuteStep (IExecutionStep Phase, Boolean & Full Synchronous) < / Code>  

update

  System.Web.Configuration.MachineKeySection.EncryptOrDecryptData (Boolean fEncrypt, byte [] buf, byte [] modifier, int32 start, int32 length , IVType system.Web.Handlers.ScriptResourceHandler.DecryptParameter on System.Web.Handlers.ScriptResourceHandler.ProcessRequestInternal on System.Web.UI.Page.DecryptStringWithIV (String S, IVType ivType) on ivType, Boolean UtilityDim AlgO, Boolean Signata). HttpResponse response, NameValueCollection query string, VirtualFileReader fileReader) on tpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute () System.Web.HttpApplication.ExecuteStep on System.Web.Ht (IExecutionStep is the step, boolean & completedSynchronously) "Text" itemprop = "text"> 

It seems that you have a different encryption key for the server, in which the result is a server ViewState is not capable of decrypting on a separate server, see below for additional information about how to fix it. I:



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