Domain Controller - Nov 2022 Patches

karthik palani 1,016 Reputation points

Hi All

We got the below emergency patches for installation on DC, Any one already applied. Please advice if this is affecting any services or any impact

Take action: Security hardening for Netlogon and Kerberos starting with November 2022 security update

• KB5020805: How to manage Kerberos protocol changes related to CVE-2022-37967
• KB5021130: How to manage Netlogon protocol changes related to CVE-2022-38023
• KB5021131: How to manage the Kerberos protocol changes related to CVE-2022-37966

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3 answers

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  1. Tim G 1 Reputation point

    After KB5019964 installed on our two Server 2016 DCs, we were unable to logon using Windows authentication to our legacy SQL2000 on a Server 2003R2 server from domain Win7 or Win10 workstations, from multiple applications, including SSMS.

    SSMS error was "Logon failed for user (null)...".

    It was still possible to connect if SQL authentication was instead used.

    Removing KB5019964 restored normal connectivity using Windows authentication.

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  2. Dishanth Sivalingam 1 Reputation point

    Same issue described by TimG-9310. After installing KB5019964 on DCs, uninstalling KB from domain controller fixed the issue. Quite similar to May 2022 update and authentication issues.

    Member servers and workstations had no-issues with or without the update. Uninstall and exclude from patch run required for DCs.

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  3. Monks89 1 Reputation point

    The December patched coming up possibly may cause another authentication issue. Following the article below, my workaround was to add the 3 reg keys. Microsoft is increasing KDC authentication.


    I've added the following keys on DCs after November patches.

    reg add "HKLM\SYSTEM\CurrentControlSet\services\kdc" /v KrbtgtFullPacSignature /t REG_DWORD /d 0 /f

    reg add "HKLM\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters" /v RequireSeal /t REG_DWORD /d 0 /f

    reg add "HKLM\SYSTEM\CurrentControlSet\services\kdc" /v ApplyDefaultDomainPolicy /t REG_DWORD /d 0 /f

    Another ref:

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