The amount of idle time required before suspending a session must be properly set.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-1174	WN08-SO-000031	SV-48063r1_rule	ECSC-1	Low

Description
Open sessions can increase the avenues of attack on a system. This setting is used to control when a computer disconnects an inactive SMB session. If client activity resumes, the session is automatically re-established. This protects critical and sensitive network data from exposure to unauthorized personnel with physical access to the computer.

STIG	Date
Windows 8 Security Technical Implementation Guide	2013-10-01

Details

Check Text ( C-44802r1_chk )
Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "Microsoft Network Server: Amount of idle time required before suspending a session" is not set to "15" minutes or less, this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: AutoDisconnect Value Type: REG_DWORD Value: 15

Check Text ( C-44802r1_chk )

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.)
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies -> Security Options.

If the value for "Microsoft Network Server: Amount of idle time required before suspending a session" is not set to "15" minutes or less, this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \System\CurrentControlSet\Services\LanManServer\Parameters\

Value Name: AutoDisconnect

Value Type: REG_DWORD
Value: 15

Fix Text (F-41201r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Microsoft Network Server: Amount of idle time required before suspending a session" to "15" minutes or less.