Metadata

Id: 4c137350-7307-4803-8c04-17c09a7a9fcf

Cloud Provider: AWS

Platform: CloudFormation

Severity: High

Category: Insecure Configurations

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• Provider Reference

Description

Access keys associated with the AWS root account grant persistent, account-wide credentials. If compromised, they can lead to full account takeover and loss of control over all resources.

In CloudFormation, AWS::IAM::AccessKey resources must not be associated with the root account. This rule flags Resources.<name>.Properties.UserName values that contain root (case-insensitive). Instead of creating or using root access keys, delete or deactivate any existing root keys, enable MFA on the root account, and provision IAM users or roles with least privilege for programmatic access.

Secure configuration example (associate access keys with an IAM user rather than the root account):

MyUser:
  Type: AWS::IAM::User
  Properties:
    UserName: app-user

MyAccessKey:
  Type: AWS::IAM::AccessKey
  Properties:
    UserName: !Ref MyUser

Compliant Code Examples

AWSTemplateFormatVersion: '2010-09-09'
Resources:
  CFNKeys:
    Type: AWS::IAM::AccessKey
    Properties:
      UserName: MyUser

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Resources": {
    "CFNKeys": {
      "Type": "AWS::IAM::AccessKey",
      "Properties": {
        "UserName": "MyUser"
      }
    }
  }
}

Non-Compliant Code Examples

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Resources": {
    "CFNKeys": {
      "Type": "AWS::IAM::AccessKey",
      "Properties": {
        "UserName": "Root"
      }
    }
  }
}

AWSTemplateFormatVersion: '2010-09-09'
Resources:
  CFNKeys:
    Type: AWS::IAM::AccessKey
    Properties:
      UserName: Root