Title

Terminal Services idle session time limit does not meet the requirement. (Cat II impact)

Discussion

This setting controls how long a session may be idle before it is automatically disconnected from the server. Users should disconnect if they plan on being away from their terminals for extended periods of time. Idle sessions should be disconnected after 15 minutes.

Check Content

If the following registry value does not exist or its value is set to 0 or greater than 15 minutes, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: MaxIdleTime Type: REG_DWORD Value: 0x000dbba0 (900000) or less but not 0

Fix Text

Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Terminal Services -> Sessions “Set time limit for active but idle Terminal Services sessions” to “Enabled”, and the “Idle session limit” to 15 minutes or less, excluding 0 which equates to “Never”.

Additional Identifiers

Rule ID: SV-3458r1_rule

Vulnerability ID: V-3458

Group Title: TS/RDS - Time Limit for Idle Session

Expert Comments

CCIs tied to check.

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