AWS Config
Developer Guide

ec2-security-group-attached-to-eni

Checks that security groups are attached to Amazon Elastic Compute Cloud (Amazon EC2) instances or to an elastic network interface. The rule returns NON_COMPLIANT if the security group is not associated with an Amazon EC2 instance or an elastic network interface.

Identifier: EC2_SECURITY_GROUP_ATTACHED_TO_ENI

Trigger type: Configuration changes

Parameters:

None

AWS CloudFormation template

To create AWS Config managed rules with AWS CloudFormation templates, see Creating AWS Config Managed Rules With AWS CloudFormation Templates.