Risk Level: High
Cloud Entity: AWS Network-Firewall
CloudGuard Rule ID: D9.AWS.NET.63
Covered by Spectral: Yes
Category: Networking & Content Delivery

GSL LOGIC

NetworkFirewall should have subnetChangeProtection=true

REMEDIATION

From Portal

Sign in to the AWS console
In the console, select the specific region
Navigate to the 'AWS Network Firewall' service.
In the left pane under 'Network Firewall' click on Firewall.
Select desired firewall and click on 'Firewall details'.
Go to 'change protection' and click on 'Edit'.
Choose 'enable' for Subnet change protection option and click 'save'.

From TF

resource "aws_networkfirewall_firewall" "example" {
  - subnet_change_protection = false
  + subnet_change_protection = true
}

From Command Line
In order to set Subnet change protection to TRUE, use to following CLI command:

aws network-firewall update-subnet-change-protection --firewall-arn FW_ARN --subnet-change-protection

Note: The flag --subnet-change-protection will set the subnet change protection to TRUE.

References

AWS Network-Firewall

AWS Network Firewall is a managed service that makes it easy to deploy essential network protections for all of your Amazon Virtual Private Clouds (VPCs). AWS Network Firewall’s flexible rules engine lets you define firewall rules that give you fine-grained control over network traffic, such as blocking outbound Server Message Block (SMB) requests to prevent the spread of malicious act

Compliance Frameworks

AWS CIS Controls V 8
AWS CloudGuard Best Practices
AWS CloudGuard SOC2 based on AICPA TSC 2017
AWS HITRUST
AWS HITRUST v11.0.0
AWS ISO27001:2022
AWS ITSG-33
AWS MITRE ATT&CK Framework v10
AWS MITRE ATT&CK Framework v11.3
AWS NIST 800-53 Rev 5
CloudGuard AWS All Rules Ruleset