The Ctrl+Alt+Del security attention sequence for logons must be enabled.

From Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide

Part of Ctrl+Alt+Del Security Attention Sequence

Associated with: CCI-000366

SV-52866r1_rule The Ctrl+Alt+Del security attention sequence for logons must be enabled.

Vulnerability discussion

Disabling the Ctrl+Alt+Del security attention sequence can compromise system security. Because only Windows responds to the Ctrl+Alt+Del security sequence, a user can be assured that any passwords entered following that sequence are sent only to Windows. If the sequence requirement is eliminated, malicious programs can request and receive a user's Windows password. Disabling this sequence also suppresses a custom logon banner.

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: \Software\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: DisableCAD Value Type: REG_DWORD Value: 0

Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Interactive Logon: Do not require CTRL+ALT+DEL" to "Disabled".

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