18.9.11.1.10 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.

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).

Impact:

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

Default Value:

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

See Also

https://workbench.cisecurity.org/files/2700

Item Details

Category: CONTINGENCY PLANNING, SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|CP-10(6), 800-53|SC-28(1), CSCv6|13.2

Plugin: Windows

Control ID: 474885208a6036f5df218ef0510e1fa64a47b774cc7cd58d076e37ceb3ead09e