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

From Windows 8 Security Technical Implementation Guide

Part of Idle Time Before Suspending a Session.

Associated with IA controls: ECSC-1

SV-48063r1_rule The amount of idle time required before suspending a session must be properly set.

Vulnerability discussion

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.

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Fix text

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.

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