Sample Cloudformation Execution Role

policy.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "ec2:Create*",
                "ec2:Describe*",
                "ec2:Modify*",
                "ec2:Delete*",
                "ec2:Attach*",
                "ec2:Detach*",
                "ec2:Associate*",
                "ec2:DisassociateRouteTable",
                "ec2:CreateInternetGateway"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": "ec2:AssociateRouteTable",
            "Resource": "arn:aws:ec2:ap-southeast-2:1234567890:route-table/*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "ec2:CreateSubnet",
                "ec2:DeleteSubnet",
                "ec2:ModifySubnetAttribute"
            ],
            "Resource": "arn:aws:ec2:ap-southeast-2:1234567890:subnet/*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "ec2:CreateSubnet",
                "ec2:CreateVpc"
            ],
            "Resource": "arn:aws:ec2:ap-southeast-2:1234567890:vpc/*"
        }
    ]
}