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MC403454: Reminder: Removal of temporary mitigation in Windows updates will require compliant printing and scanning devices

As previously announced, Microsoft released hardening changes for CVE-2021-33764 in Windows updates starting on July 13, 2021. When these updates are installed on a domain controller (DC), smart card (PIV) authentication might cause print and scan failures. The affected devices are smart card authenticating printers, scanners, and multifunction devices that don’t support either Diffie-Hellman (DH) for key exchange during PKINIT Kerberos authentication or don’t advertise support for des-ede3-cbc (“triple DES”) during the Kerberos AS request.

A temporary mitigation, released in Windows Updates between July 29, 2021, and July 12, 2022, was made available for organizations that encountered this issue and couldn’t bring devices into compliance as required for CVE-2021-33764. However, starting on July 21, 2022, this temporary mitigation will not be usable in security updates. The Windows July 2022 preview update will remove the temporary mitigation and will require compliant printing and scanning devices

When will this happen

Refer to the below timeline to understand the progressive hardening coming:

  • July 21, 2022: Optional preview update released for Windows Server 2019 will remove temporary mitigation and will require compliant printing and scanning devices in your environment.
  • August 9, 2022: All updates released on this day or later will be unable to use the temporary mitigation. This applies to: Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2 SP1, and Windows Server 2008 SP2.

Message ID: MC403454
Published: 22 July 2022
Updated: 22 July 2022
Platform: World tenant, Online

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