The Juniper SRX Services Gateway Firewall must be configured to fail securely in the event of an operational failure of the firewall filtering or boundary protection function.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-214534	JUSX-AG-000127	SV-214534r557389_rule		Medium

Description
If a boundary protection device fails in an unsecure manner (open), information external to the boundary protection device may enter, or the device may permit unauthorized information release. Secure failure ensures when a boundary control device fails, all traffic will be subsequently denied. Fail secure is a condition achieved by employing information system mechanisms to ensure in the event of operational failures of boundary protection devices at managed interfaces (e.g., routers, firewalls, guards, and application gateways residing on protected subnetworks commonly referred to as demilitarized zones), information systems do not enter into unsecure states where intended security properties no longer hold.

Description

If a boundary protection device fails in an unsecure manner (open), information external to the boundary protection device may enter, or the device may permit unauthorized information release. Secure failure ensures when a boundary control device fails, all traffic will be subsequently denied. Fail secure is a condition achieved by employing information system mechanisms to ensure in the event of operational failures of boundary protection devices at managed interfaces (e.g., routers, firewalls, guards, and application gateways residing on protected subnetworks commonly referred to as demilitarized zones), information systems do not enter into unsecure states where intended security properties no longer hold.

STIG	Date
Juniper SRX Services Gateway ALG Security Technical Implementation Guide	2020-09-28

Details

Check Text ( C-15740r297286_chk )
Request documentation of the architecture and Juniper SRX configuration. Verify the site has configured the SRX to fail closed, thus preventing traffic from flowing through without filtering and inspection. If the site has not configured the SRX to fail closed, this is a finding.

Fix Text (F-15738r297287_fix)
Implement and configure the Juniper SRX to fail closed, thus preventing traffic from flowing through without filtering and inspection. In case of failure, document a process for the Juniper SRX to be configured to fail closed. Redundancy should be implemented if failing closed has a mission impact.