VMware vSphere

 View Only

Writing from Windows to VMWare UEFI

  • 1.  Writing from Windows to VMWare UEFI

    Posted 20 days ago

    Hello,

    i have a Windows Server VM and for security reasons i want to use VBS and Code Integrity with UEFI Lock

    https://learn.microsoft.com/en-us/windows/security/hardware-security/enable-virtualization-based-protection-of-code-integrity?tabs=reg

    I set the lock with powershell, but unfortunately it is not working. Using the GUI i can not disable "code integrity", but it is easily possiby by editing registry with regedit. You can change value to 0 and GUI allows disabling. reason is because the VM can not write to UEFI. With a real uefi Lock it should not be possible to deactivate the security features with windows tools.

    I think  VMWare UEFI  is just a rudimentary implementation of uefi with minimal featureset and therefore not writable.

    Do you agree or did i miss something? In this case it would be very useful to create a uefi-based security socket which can not be detached even by local administrator.

    Thanks,
    Hans