V-254474 | Windows Server 2022 must be configured to ...

Microsoft Windows Server 2022

Windows Server 2022 must be configured to prevent the storage of the LAN Manager hash of passwords

STIG ID: WN22-SO-000300 | SRG: SRG-OS-000073-GPOS-00041 | Severity: High | CCI: CCI-004062,CCI-000196 | Vulnerability ID: V-254474

Description

The LAN Manager hash uses a weak encryption algorithm and there are several tools available that use this hash to retrieve account passwords. This setting controls whether a LAN Manager hash of the password is stored in the SAM the next time the password is changed.

Check

C-57959r849236_chk

If the following registry value does not exist or is not configured as specified, this is a finding:Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\Value Name: NoLMHashValue Type: REG_DWORDValue: 0x00000001 (1)

Fix

F-57910r849237_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> Network security: Do not store LAN Manager hash value on next password change to "Enabled".