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

From Windows Server 2008 R2 Domain Controller Security Technical Implementation Guide

Associated with IA controls: ECSC-1, IAIA-2, IAIA-1

SV-32339r1_rule The system will be configured to prevent the storage of the LAN Manager hash of passwords.

Vulnerability discussion

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. The LAN Manager hash is a weak encryption algorithm and there are several tools available that use this hash to retrieve account passwords.

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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”.

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