The FortiGate device must terminate idle sessions after 10 minutes of inactivity.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-234213	FGFW-ND-000270	SV-234213r611828_rule		Medium

Description
If a device management session or connection remains open after management is completed, it may be hijacked by an attacker and used to compromise or damage the network device. Nonlocal device management and diagnostic activities are those activities conducted by individuals communicating through a network, either an external network (e.g., the internet) or an internal network. In the event the remote node has abnormally terminated or an upstream link from the managed device is down, the management session will be terminated, thereby freeing device resources and eliminating any possibility of an unauthorized user being orphaned to an open idle session of the managed device.

Description

If a device management session or connection remains open after management is completed, it may be hijacked by an attacker and used to compromise or damage the network device. Nonlocal device management and diagnostic activities are those activities conducted by individuals communicating through a network, either an external network (e.g., the internet) or an internal network. In the event the remote node has abnormally terminated or an upstream link from the managed device is down, the management session will be terminated, thereby freeing device resources and eliminating any possibility of an unauthorized user being orphaned to an open idle session of the managed device.

STIG	Date
Fortinet FortiGate Firewall NDM Security Technical Implementation Guide	2022-09-12

Details

Check Text ( C-37398r611826_chk )
Verify the FortiGate device terminates all network connections when non-local device maintenance is complete. Log in to the FortiGate GUI with Super-Admin privilege. 1. Click System. 2. Click Settings. 3. Go to Administrative Settings. 4. Verify Idle Timeout is configured to 10 minutes. If the idle-timeout value is not 10 minutes, this is a finding. or 1. Open a CLI console, via SSH or available from the GUI. 2. Run the following command: # show full-configuration sys global \| grep -i admintimeout The output should be: set admintimeout 10 If the admintimeout parameter is not set to 10 minutes, this is a finding.

Check Text ( C-37398r611826_chk )

Verify the FortiGate device terminates all network connections when non-local device maintenance is complete.

Log in to the FortiGate GUI with Super-Admin privilege.

1. Click System.
2. Click Settings.
3. Go to Administrative Settings.
4. Verify Idle Timeout is configured to 10 minutes.

If the idle-timeout value is not 10 minutes, this is a finding.

or

1. Open a CLI console, via SSH or available from the GUI.
2. Run the following command:
# show full-configuration sys global | grep -i admintimeout

The output should be:
set admintimeout 10

If the admintimeout parameter is not set to 10 minutes, this is a finding.

Fix Text (F-37363r611827_fix)
To configure the device to terminate all network connections when non-local maintenance is complete: Log in to the FortiGate GUI with Super-Admin privilege. 1. Click System. 2. Click Settings. 3. Go to Administrative Settings. 4. Enter the Idle Timeout value of 10. 5. Click Apply. or 1. Open a CLI console, via SSH or available from the GUI. 2. Run the following command: # config system global # set admintimeout 10 # end

Fix Text (F-37363r611827_fix)

To configure the device to terminate all network connections when non-local maintenance is complete:

Log in to the FortiGate GUI with Super-Admin privilege.

1. Click System.
2. Click Settings.
3. Go to Administrative Settings.
4. Enter the Idle Timeout value of 10.
5. Click Apply.

or

1. Open a CLI console, via SSH or available from the GUI.
2. Run the following command:
# config system global
# set admintimeout 10
# end