STIGQter: STIG Summary: Windows 10 Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 04 May 2021:

Windows 10 systems must use a BitLocker PIN for pre-boot authentication.

DISA Rule

SV-220703r569288_rule

Vulnerability Number

V-220703

Group Title

SRG-OS-000185-GPOS-00079

Rule Version

WN10-00-000031

Severity

CAT II

CCI(s)

• CCI-002476 - The information system implements cryptographic mechanisms to prevent unauthorized disclosure of organization-defined information at rest on organization-defined information system components.
• CCI-002475 - The information system implements cryptographic mechanisms to prevent unauthorized modification of organization-defined information at rest on organization-defined information system components.
• CCI-001199 - The information system protects the confidentiality and/or integrity of organization-defined information at rest.

Weight

10

Fix Recommendation

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> BitLocker Drive Encryption >> Operating System Drives "Require additional authentication at startup" to "Enabled" with "Configure TPM Startup PIN:" set to "Require startup PIN with TPM" or with "Configure TPM startup key and PIN:" set to "Require startup key and PIN with TPM".

Check Contents

If the following registry value does not exist or is not configured as specified, this is a finding.

For virtual desktop implementations (VDIs) in which the virtual desktop instance is deleted or refreshed upon logoff, this is NA.

For WVD implementations with no data at rest, this is NA.

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\FVE\

Value Name: UseAdvancedStartup
Type: REG_DWORD
Value: 0x00000001 (1)

If one of the following registry values does not exist or is not configured as specified, this is a finding.

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\FVE\

Value Name: UseTPMPIN
Type: REG_DWORD
Value: 0x00000001 (1)

Value Name: UseTPMKeyPIN
Type: REG_DWORD
Value: 0x00000001 (1)

When BitLocker network unlock is used:

Value Name: UseTPMPIN
Type: REG_DWORD
Value: 0x00000002 (2)

Value Name: UseTPMKeyPIN
Type: REG_DWORD
Value: 0x00000002 (2)

BitLocker network unlock may be used in conjunction with a BitLocker PIN. See the article below regarding information about network unlock.

https://docs.microsoft.com/en-us/windows/security/information-protection/bitlocker/bitlocker-how-to-enable-network-unlock

Vulnerability Number

V-220703

Documentable

False

Rule Version

WN10-00-000031

Severity Override Guidance

If the following registry value does not exist or is not configured as specified, this is a finding.

For virtual desktop implementations (VDIs) in which the virtual desktop instance is deleted or refreshed upon logoff, this is NA.

For WVD implementations with no data at rest, this is NA.

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\FVE\

Value Name: UseAdvancedStartup
Type: REG_DWORD
Value: 0x00000001 (1)

If one of the following registry values does not exist or is not configured as specified, this is a finding.

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\FVE\

Value Name: UseTPMPIN
Type: REG_DWORD
Value: 0x00000001 (1)

Value Name: UseTPMKeyPIN
Type: REG_DWORD
Value: 0x00000001 (1)

When BitLocker network unlock is used:

Value Name: UseTPMPIN
Type: REG_DWORD
Value: 0x00000002 (2)

Value Name: UseTPMKeyPIN
Type: REG_DWORD
Value: 0x00000002 (2)

BitLocker network unlock may be used in conjunction with a BitLocker PIN. See the article below regarding information about network unlock.

https://docs.microsoft.com/en-us/windows/security/information-protection/bitlocker/bitlocker-how-to-enable-network-unlock

Check Content Reference

M

Target Key

4072

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