Title

Remote assistance must display a warning message when allowing helpdesk personnel to control a system. (Cat III impact)

Discussion

Requiring warning text to display when allowing helpdesk personnel to control remote assistance sessions ensures personnel of the activity and enforces the need to monitor the activity.

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 Subkey: \Software\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: ShareControlMessage Type: REG_SZ Value: You are about to allow other personnel to remotely control your system. You must monitor the activity until the session is closed.

Fix Text

Configure the policy value for Computer Configuration -> Administrative Templates -> System -> Remote Assistance -> "Customize warning messages" to "Enabled" with "You are about to allow other personnel to remotely control your system. You must monitor the activity until the session is closed." entered in the "Display warning message before sharing control:" field.

Additional Identifiers

Rule ID: SV-48315r2_rule

Vulnerability ID: V-36692

Group Title: WN08-CC-000060

Expert Comments

CCIs tied to check.

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