Title

Users are not forcibly disconnected when logon hours expire. (Cat III impact)

Discussion

Users should not be permitted to remain logged on to the network after they have exceeded their permitted logon hours. In many cases, this indicates that a user forgot to log off before leaving for the day. However, it may also indicate that a user is attempting unauthorized access at a time when the system may be less closely monitored. This protects critical and sensitive network data from exposure to unauthorized personnel with physical access to the computer.

Check Content

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: Disconnect Clients When Logon Hours Expire” is not set to “Enabled”, then 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: EnableForcedLogoff Value Type: REG_DWORD Value: 1 Note: The Gold Disk uses an API call to check internal system values, in addition to checking the related registry setting for this value. Using the MMC to review this setting may return a false negative; therefore, the Gold Disk result takes precedence. Setting this value with either the Gold Disk or the MMC updates the internal values as well as the appropriate registry value.

Fix Text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “Microsoft Network Server: Disconnect Clients When Logon Hours Expire” to “Enabled”.

Additional Identifiers

Rule ID: SV-1136r1_rule

Vulnerability ID: V-1136

Group Title: Forcibly Disconnect when Logon Hours Expire

Expert Comments

CCIs tied to check.

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