An OOB (out-of-band) update released by Microsoft addresses an issue that causes SSL and TLS handshake failures on client and server platforms
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On affected devices, users see SEC_E_ILLEGAL_MESSAGE in applications when connections to servers are experiencing issues.
“ We are addressing an issue that may affect certain types of Secure Sockets Layer (SSL) and Transport Layer Security (TLS) connections , which may result in handshake failures ,” Microsoft explains
The known issue addressed in OOB updates affects many versions of Windows, including:
Client : Windows 11, version 22H2. Windows 11, version 21H2; Windows 10, version 21H2; Windows 10, version 21H1; Windows 10, version 20H2; Windows 10 Enterprise LTSC 2019; Windows 10 Enterprise LTSC 2016; Windows 10 Enterprise 2015 LTSB; Windows 8.1; Windows 7 SP1
Server : Windows Server 2022; Windows Server 2019? Windows Server 2016? Windows Server 2012 R2; Windows Server 2012? Windows Server 2008 R2 SP1
Updates cannot be installed through Windows Update, Windows Update for Business, or Windows Server Update Services (WSUS).
You can install them by downloading them from the Microsoft Update Catalog and manually importing them into WSUS and Microsoft Endpoint Configuration Manager.
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Microsoft has released both individual packages and cumulative updates:
Cumulative updates:
Windows 11, version 21H2: KB5020387
Windows Server 2022: KB5020436
Windows 10, version 20H2; Windows 10, version 21H1; Windows 10, version 22H1; Windows 10 Enterprise LTSC 2021: KB5020435
Windows 10 Enterprise LTSC 2019? Windows Server 2019: KB5020438
Individual updates:
Windows 8.1? Windows Server 2012 R2: KB5020447
Windows Server 2012: KB5020449
Windows 7 SP1? Windows Server 2008 R2 SP1: KB5020448
The company is still working on a fix for Windows 10 2016 LTSB, Windows Server 2016 , and Windows 10 2015 LTSB.
After deploying the update, the service may fail to start because a network driver was not found, due to the update of the PnP class drivers used by the service.
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Last month, Microsoft said it accidentally rolled out the Windows to Windows Server Update Services (WSUS).
The company added that until the update from WSUS, it could lead to issues installing the security update in some managed environments.
