The initial March 13, 2018, release updates the CredSSP authentication protocol and the Remote Desktop clients for all affected platforms.
Removing these updates and rebooting will restore functionality, but is not recommended.For those of you who may have recently installed security updates on Windows 10 workstations in the past few days, you may notice that you receive a peculiar error when trying to establish a remote desktop connection to a server that worked before installing the updates manually or via Windows Server Update Services. On the client Windows 10 OS, remove KB4103727. REG ADD HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters\ /v AllowEncryptionOracle /t REG_DWORD /d 2 Solution 3: Remove Patch Step 1: Press Windows + S, type cmd in the dialogue box, right-click on the application and select Run as administrator. If you do not have Group Policy Editor on computer then you can use registry editor to add this key: Policy path: Computer Configuration -> Administrative Templates -> System -> Credentials Delegation Set Encryption Oracle Remediation Security Policy to ‘Vulnerable‘ to get things working, get EVERYTHING patched, then change it back to ‘Mitigated‘ or ‘Force Updated‘. Solution 2: Encryption Oracle Remediation Policy More affected product at Microsoft Security TechCenter. That’s KB4103723 for Server 2016, KB4103725 for Server 2012 R2 and KB4103718 for Windows Server 2008 R2, as well as installing the client side patches of KB4103727 for Windows 10 Version 1709, KB4103721 for Windows 10 Version 1803, KB4103725 for Windows 8.1 or KB4103718 for Windows 7 SP 1.
Patch the Remote Desktop gateway and host servers themselves and performing a reboot. In the Event Viewer of the gateway, under App and Services Logs > Microsoft > Windows > TerminalServices-LocalSessionManager you can see Event ID 41 (with user name of affected user) and Event ID 40 (w/ reason code 0) immediately afterwards. This security update breaks Remote Desktop connections to Server 20R2 when using the Remote Desktop Gateway role. This issue happen after you have applied a windows security update included Credential Security Support Provider protocol (CredSSP) updates for CVE-2018-0886. This could be due to CredSSP encryption oracle remediation. Problem: When attempting to perform RDP from Windows 10 to remote computer Windows Server 2012 R2 or Windows Server 2016, below error message show:
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