CIS Microsoft Windows 10 Enterprise Release 1909 Benchmark

18.9.11.2.15 (BL) Ensure 'Configure use of passwords for operating systemdrives' is set to 'Disabled' (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 specifies the constraints for passwords used to unlock BitLocker- protected operating system drives.

Note: This setting is enforced when turning on BitLocker, not when unlocking a volume. BitLocker will allow unlocking a drive with any of the protectors available on the drive.

The recommended state for this setting is: Disabled .

Rationale:

Using a dictionary-style attack, passwords can be guessed or discovered by repeatedly attempting to unlock a drive. Since this type of BitLocker password does include anti- dictionary attack protections provided by a TPM, for example, there is no mechanism to slow down rapid brute-force attacks against them.

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:OSPassphrase

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