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Check: WN12-SO-000063

Microsoft Windows Server 2012/2012 R2 Domain Controller STIG: WN12-SO-000063 (in versions v3 r7 through v2 r7)

Title

PKU2U authentication using online identities must be prevented. (Cat II impact)

Discussion

PKU2U is a peer-to-peer authentication protocol. This setting prevents online identities from authenticating to domain-joined systems. Authentication will be centrally managed with Windows user accounts.

Check Content

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\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".

Additional Identifiers

Rule ID: SV-226326r794604_rule

Vulnerability ID: V-226326

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-000366	The organization implements the security configuration settings.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
CM-6	Configuration Settings