API Gateway With Open Access

• Query id: 1056dfbb-5802-4762-bf2b-8b9b9684b1b0
• Query name: API Gateway With Open Access
• Platform: CloudFormation
• Severity: Medium
• Category: Insecure Configurations
• CWE: 284
• URL: Github

Description

API Gateway Method should restrict the authorization type, except for the HTTP OPTIONS method.
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: "Router53"
Resources:
  MockMethod:
    Type: 'AWS::ApiGateway::Method'
    Properties:
      RestApiId: !Ref MyApi
      ResourceId: !GetAtt
        - MyApi
        - RootResourceId
      HttpMethod: GET
      AuthorizationType: NONE
      Integration:
        Type: MOCK

Positive test num. 2 - json file

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "Router53",
  "Resources": {
    "MockMethod": {
      "Type": "AWS::ApiGateway::Method",
      "Properties": {
        "RestApiId": "MyApi",
        "ResourceId": [
          "MyApi",
          "RootResourceId"
        ],
        "HttpMethod": "GET",
        "AuthorizationType": "NONE",
        "Integration": {
          "Type": "MOCK"
        }
      }
    }
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: "Router53"
Resources:
  MockMethod:
    Type: 'AWS::ApiGateway::Method'
    Properties:
      RestApiId: !Ref MyApi
      ResourceId: !GetAtt
        - MyApi
        - RootResourceId
      HttpMethod: OPTIONS
      AuthorizationType: NONE
      Integration:
        Type: MOCK

Negative test num. 2 - json file

{
  "Description": "Router53",
  "Resources": {
    "MockMethod": {
      "Type": "AWS::ApiGateway::Method",
      "Properties": {
        "RestApiId": "MyApi",
        "ResourceId": [
          "MyApi",
          "RootResourceId"
        ],
        "HttpMethod": "OPTIONS",
        "AuthorizationType": "NONE",
        "Integration": {
          "Type": "MOCK"
        }
      }
    }
  },
  "AWSTemplateFormatVersion": "2010-09-09"
}