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WN11-SO-000195 The system must be configured to prevent the storage of the LAN Manager hash of passwords.

DISA STIG library V2R11
All changes in this version
first version loaded CAT I

Maps to IA-5(1) via CCI-004062, CCI-000196

Title

The system must be configured to prevent the storage of the LAN Manager hash of passwords.

Control

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: NoLMHash Value Type: REG_DWORD Value: 1

Discussion

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 or not a LAN Manager hash of the password is stored in the SAM the next time the password is changed.

Related controls

CCI-000196, CCI-004062

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".