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-29225r2_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 Vista Security Technical Implementation Guide	2015-09-01

Details

Check Text ( C-61999r1_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-61999r1_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-66895r1_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.