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

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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-3379	WN12-SO-000065	SV-52892r2_rule	ECSC-1 IAIA-1 IAIA-2	High

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

STIG	Date
Windows Server 2012 / 2012 R2 Member Server Security Technical Implementation Guide	2015-06-16

Details

Check Text ( C-47209r2_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: NoLMHash Value Type: REG_DWORD Value: 1

Fix Text (F-45818r1_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".