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	4.028	SV-32313r2_rule		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 Server 2008 R2 Member Server Security Technical Implementation Guide	2017-12-05

Details

Check Text ( C-62033r1_chk )
Analyze the system using the Security Configuration and Analysis snap-in. 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 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: 0x0000000f (15) (or less)

Check Text ( C-62033r1_chk )

Analyze the system using the Security Configuration and Analysis snap-in.
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 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: 0x0000000f (15) (or less)

Fix Text (F-66931r1_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 session" to "15" minutes or less.