18.9.11.1.11 Ensure 'Configure use of passwords for fixed data drives' is set to 'Disabled'

Information

This policy setting specifies whether a password is required to unlock BitLocker-protected fixed data 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.

Impact:

The password option will not be available when configuring BitLocker for fixed drives.

Solution

To establish the recommended configuration via GP, set the following UI path to Disabled:

Computer Configuration\Policies\Administrative Templates\Windows Components\BitLocker Drive Encryption\Fixed Data Drives\Configure use of passwords for fixed data drives

Note: This Group Policy path may not exist by default. It is provided by the Group Policy template VolumeEncryption.admx/adml that is included with the Microsoft Windows 7 & Server 2008 R2 Administrative Templates (or newer).

Default Value:

Passwords are supported, without complexity requirements and with an 8 character minimum.

See Also

https://workbench.cisecurity.org/files/3714

Item Details

Category: IDENTIFICATION AND AUTHENTICATION

References: 800-53|IA-5(1), CSCv7|13.6

Plugin: Windows

Control ID: 1432e59107ec1f47917da944235337e13fa58a60dce791a5eefbd33f83e4ada5