Security group inline ingress opens a management port to ::/0

What it checks

Security group: inline ingress allows ::/0 on a known debug/management port.

Where it applies

Terraform: aws_security_group, aws_security_group_rule

CloudFormation: AWS::EC2::SecurityGroup

How to fix it

1. Replace ::/0 in ipv6_cidr_blocks with a specific prefix, or drop the ipv6_cidr_blocks entry if the service is IPv4-only.

Frameworks

• AWS FSBP EC2.19
• SOC 2 CC6.6
• HIPAA 164.312(a)(1)

These mappings are advisory, not an attestation of compliance.

Vendor documentation

All rules