PKU2U authentication using online identities will be prevented.

From Windows Server 2008 R2 Domain Controller Security Technical Implementation Guide

Part of PKU2U Online Identities Authentication

Associated with: CCI-000366

SV-32447r1_rule PKU2U authentication using online identities will be prevented.

Vulnerability discussion

This setting prevents online identities from being used by PKU2U, which is a peer-to-peer authentication protocol. Authentication will be centrally managed with Windows user accounts.

Check content

Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for “Network Security: Allow PKU2U authentication requests to this computer to use online identities” is not set to “Disabled”, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \System\CurrentControlSet\Control\LSA\pku2u\ Value Name: AllowOnlineID Type: REG_DWORD Value: 0

Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “Network Security: Allow PKU2U authentication requests to this computer to use online identities” to “Disabled”.

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