CIS Microsoft Windows 10 Enterprise Release 1909 Benchmark

18.9.11.2.7 (BL) Ensure 'Choose how BitLocker-protected operating systemdrives can be recovered: Omit recovery options from the BitLocker setup wizard' is set to 'Enabled: True' (Scored)

ProfileApplicability:

 Level 1 (L1) + BitLocker (BL)

 Level 2 (L2) + BitLocker (BL)

 BitLocker (BL) - optional add-on for when BitLocker is deployed

Description:

This policy setting allows you to control how BitLocker-protected operating system drives are recovered in the absence of the required startup key information. This policy setting is applied when you turn on BitLocker. Select "Omit recovery options from the BitLocker setup wizard" to prevent users from specifying recovery options when they enable BitLocker on a drive. This means that you will not be able to specify which recovery option to use when you enable BitLocker, instead BitLocker recovery options for the drive are determined by the policy setting.

The recommended state for this setting is: Enabled: True (checked).

Rationale:

Should a user lose their primary means for accessing an encrypted OS volume, or should the system not pass its boot time integrity checks, the system will go into recovery mode. If the recovery key has not been backed up to Active Directory, the user would need to have saved the recovery key to another location such as a USB flash drive, or have printed the recovery password, and now have access to one of those in order to recovery the system. If the user is unable to produce the recovery key, then the user will be denied access to the encrypted volume and subsequently any data that is stored there.

Audit:

Navigate to the UI Path articulated in the Remediation section and confirm it is set as prescribed. This group policy setting is backed by the following registry location:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\FVE:OSHideRecoveryPage

839 | P a g e