We are getting the folling error upon installing KB976767 and KB97677, and the worker process crashes: (2008 standard, x86) An unhandled exception occurred and the process was terminated. Application ID: /LM/W3SVC/1/ROOT/SOME..DIR Process ID: 2472 Exception: System.TypeLoadException Message: Could not load type 'System.Security.Authentication.ExtendedProtection.ChannelBinding' from assembly 'System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. StackTrace: at System.Web.Hosting.IIS7WorkerRequest.Dispose() at System.Web.Hosting.PipelineRuntime.DisposeHandlerPrivate(HttpContext context) at System.Web.HttpRuntime.FinishRequestNotification(IIS7WorkerRequest wr, HttpContext context, RequestNotificationStatus& status) at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr managedHttpContext, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags) at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr managedHttpContext, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags) I appreciate any help... Thanks. PS: If I need to post this somewhere else, let me know.

Same here, we are down. Is there a fix for this?

More information if it helps: (based on the MINIdump of worker process) FAULTING_IP: kernel32!RaiseException+58 75ec42eb c9 leave EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff) ExceptionAddress: 75ec42eb (kernel32!RaiseException+0x00000058) ExceptionCode: e0434f4d (CLR exception) ExceptionFlags: 00000001 NumberParameters: 1 Parameter[0]: 80131522 DEFAULT_BUCKET_ID: CLR_EXCEPTION PROCESS_NAME: w3wp.exe ERROR_CODE: (NTSTATUS) 0xe0434f4d - <Unable to get error code text> EXCEPTION_CODE: (NTSTATUS) 0xe0434f4d - <Unable to get error code text> EXCEPTION_PARAMETER1: 80131522 AUTOBUG_USER_LCID_STR: ENU AUTOBUG_OS_SKU: 7 NTGLOBALFLAG: 0 APPLICATION_VERIFIER_FLAGS: 0 MANAGED_STACK: !dumpstack -EE No export dumpstack found MANAGED_BITNESS_MISMATCH: Managed code needs matching platform of sos.dll for proper analysis. Use 'x86' debugger. FAULTING_THREAD: ffffffff PRIMARY_PROBLEM_CLASS: CLR_EXCEPTION BUGCHECK_STR: APPLICATION_FAULT_CLR_EXCEPTION LAST_CONTROL_TRANSFER: from 71ca2bbc to 75ec42eb STACK_TEXT: 75ec42eb kernel32!RaiseException+0x58 71ca2bbc mscorwks!RaiseTheExceptionInternalOnly+0x2a8 71ca5aba mscorwks!JIT_Rethrow+0xbf 6da8acfd System_Web_ni+0x80acfd 6a2f7bc3 webengine!W3_MGD_HANDLER::ProcessNotification+0x59 6a2f865c webengine!W3_MGD_HANDLER::DoWork+0x235 6a2f5e48 webengine!RequestDoWork+0x2c3 6a2f617e webengine!CMgdEngHttpModule::OnEndRequest+0x18 6ee92ee3 iiscore!NOTIFICATION_CONTEXT::RequestDoWork+0x22c 6ee93686 iiscore!NOTIFICATION_CONTEXT::CallModulesInternal+0x2ec 6ee9aa7c iiscore!NOTIFICATION_CONTEXT::CallModules+0x28 6ee9c097 iiscore!W3_CONTEXT::DoStateGeneralEvent+0x36 6ee939f7 iiscore!W3_CONTEXT::DoWork+0xd7 6ee964e9 iiscore!W3_MAIN_CONTEXT::ContinueNotificationLoop+0x1f 6ee9a765 iiscore!W3_MAIN_CONTEXT::ProcessIndicateCompletion+0x1f 6ee9a73b iiscore!W3_CONTEXT::IndicateCompletion+0x63 6a2f2863 webengine!W3_MGD_HANDLER::IndicateCompletion+0x3b 6a2f2898 webengine!MgdIndicateCompletion+0x22 010e1465 unknown+0x0 6da8ab95 System_Web_ni+0x80ab95 6da8acef System_Web_ni+0x80acef 71c21e5f mscorwks!UM2MThunk_WrapperHelper+0x1f 71e7960a mscorwks!UM2MThunk_WrapperWorker+0x60 71e79741 mscorwks!UM2MThunk_Wrapper+0x14 71c752b1 mscorwks!Thread::DoADCallBack+0xda 71e797c5 mscorwks!UM2MDoADCallBack+0x7c 00ff23d2 unknown+0x0 6a2f7bc3 webengine!W3_MGD_HANDLER::ProcessNotification+0x59 6a2f3497 webengine!ProcessNotificationCallback+0x2d 71c74e0c mscorwks!UnManagedPerAppDomainTPCount::DispatchWorkItem+0x9a 71c7471e mscorwks!ThreadpoolMgr::ExecuteWorkRequest+0xaf 71c74892 mscorwks!ThreadpoolMgr::WorkerThreadStart+0x20b 71d25715 mscorwks!Thread::intermediateThreadProc+0x49 75ec4911 kernel32!BaseThreadInitThunk+0xe 771fe4b6 ntdll!__RtlUserThreadStart+0x23 771fe489 ntdll!_RtlUserThreadStart+0x1b STACK_COMMAND: .cxr 000000000E43EA58 ; kb ; dds e43ed24 ; kb FOLLOWUP_IP: mscorwks!RaiseTheExceptionInternalOnly+2a8 71ca2bbc c745fcfeffffff mov dword ptr [ebp-4],0FFFFFFFEh SYMBOL_STACK_INDEX: 1 SYMBOL_NAME: mscorwks!RaiseTheExceptionInternalOnly+2a8 FOLLOWUP_NAME: MachineOwner MODULE_NAME: mscorwks IMAGE_NAME: mscorwks.dll DEBUG_FLR_IMAGE_TIMESTAMP: 4a7cd88e FAILURE_BUCKET_ID: CLR_EXCEPTION_e0434f4d_mscorwks.dll!RaiseTheExceptionInternalOnly BUCKET_ID: APPLICATION_FAULT_CLR_EXCEPTION_mscorwks!RaiseTheExceptionInternalOnly+2a8 WATSON_IBUCKET: 1229804586 WATSON_IBUCKETTABLE: 1 WATSON_STAGEONE_URL: http://watson.microsoft.com/StageOne/w3wp_exe/7_0_6001_18000/47919413/kernel32_dll/6_0_6001_18215/49953395/e0434f4d/000442eb.htm?Retriage=1 Followup: MachineOwner ---------

We had the same/similar issue today and had to remove the two hotfixes from the server in order to resolve the issue. Once removed the error stopped, application pool became stable and the site would resolve once again. Removed the following updates: HotFixID: KB976767 Description: Security Update http://support.microsoft.com/kb/976767 HotFixID: KB976771 Description: Security Update http://support.microsoft.com/kb/976771

I'm on XP SP3, I the two updates there are: HotFixID: KB979909 Description: Security Update http://support.microsoft.com/kb/979909 HotFixID: KB976765 Description: Security Update http://support.microsoft.com/kb/976765

Hi, As this issue is related to IIS, I suggest discussing it in our IIS fourm. http://forums.iis.net/ Tim Quan - MSFT

We have a thread on forums.iis.net about this now. http://forums.iis.net/t/1168665.aspx So focus your queries there. No reports as far as I can see with other related KB it appears only to effect Windows 2008 SP1

This is not an IIS problem its a .net framework problem. It may only manifest on systems with IIS installed but it is not an IIS problem. System.ServiceModel.dll is referencing System.dll. It expects to find the type System.Security.Authentication.ExtendedProtection.ChannelBinding in system.dll and its not there. Some patch that was deliverd changed system.servicemodel.dll without changing system.dll. I assume that I am missing some other patch. I have a patch that just wont apply for some reason kb974417 no matter how many times I try to apply it, it wont apply no error just continues to try an apply the patch. may be unrelated though. This is also not a 2008 only problem I am on XP SP3 IIS5 dotnet 3.5 SP1

On XP this is the same issue as http://social.msdn.microsoft.com/Forums/en-US/netfxnetcom/thread/853e2c1e-9216-46b3-b8e7-0594b64f01b4 So its definately not an IIS problem (on xp at least) removing KB976769v2 fixes the issue. Any idea when a patch might come out. I am pretty worried that my end users are going to start getting this issue.

Hello, I am just wondering if there is any more news on this issue, so far uninstalling the patch fixes the issue but as it requires a server reboot each time it is not overly practical and I don't want to have to disable Automatic Updates. Lee

Hi Lee, The only workaround we were able to find so far is to install SP2 if you are running on 2008 SP1. Hope this helps... You might also want to check out the latest comments at http://forums.iis.net/t/1168665.aspx....

bt07, you SAVED ME!!! I took your advice after about two days of working on this, and upgraded to Server 2008 SP2 from 2008 SP1. It immediately fixed my problem! I was running a SharePoint environment that broke after a failed upgrade. When trying to load central admin or any sites, it would prompt me for every other item that the page loaded, as if it couldn't maintain the security information or something. After every prompt the error log would log the message posted above about: Exception: System.TypeLoadException Message: Could not load type 'System.Security.Authentication.ExtendedProtection.ChannelBinding' from assembly' I tried everything else with no success until I saw your post. THANK YOU!!