MQ Broker Is Publicly Accessible

• Query id: 68b6a789-82f8-4cfd-85de-e95332fe6a61
• Query name: MQ Broker Is Publicly Accessible
• Platform: CloudFormation
• Severity: High
• Category: Insecure Configurations
• CWE: 668
• URL: Github

Description

Check if any MQ Broker is not publicly accessible
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: "Create a basic ActiveMQ broker"
Resources:
  BasicBroker:
    Type: "AWS::AmazonMQ::Broker"
    Properties:
      AutoMinorVersionUpgrade: "false"
      BrokerName: MyBasicBroker
      DeploymentMode: SINGLE_INSTANCE
      EncryptionOptions:
        UseAwsOwnedKey: true
      EngineType: ActiveMQ
      EngineVersion: "5.15.0"
      HostInstanceType: mq.t2.micro
      PubliclyAccessible: true
      Users:
        -
          ConsoleAccess: "true"
          Groups:
            - MyGroup
          Password:
            Ref: "BrokerPassword"
          Username:
            Ref: "BrokerUsername"

Positive test num. 2 - json file

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "Create a basic ActiveMQ broker",
  "Resources": {
    "BasicBroker2": {
      "Type": "AWS::AmazonMQ::Broker",
      "Properties": {
        "BrokerName": "MyBasicBroker",
        "DeploymentMode": "SINGLE_INSTANCE",
        "EncryptionOptions": {
          "UseAwsOwnedKey": true
        },
        "EngineType": "ActiveMQ",
        "EngineVersion": "5.15.0",
        "HostInstanceType": "mq.t2.micro",
        "Users": [
          {
            "ConsoleAccess": "true",
            "Groups": [
              "MyGroup"
            ],
            "Password": {
              "Ref": "BrokerPassword"
            },
            "Username": {
              "Ref": "BrokerUsername"
            }
          }
        ],
        "AutoMinorVersionUpgrade": "false",
        "PubliclyAccessible": true
      }
    }
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: "Create a basic ActiveMQ broker"
Resources:
  BasicBroker:
    Type: "AWS::AmazonMQ::Broker"
    Properties:
      AutoMinorVersionUpgrade: "false"
      BrokerName: MyBasicBroker
      DeploymentMode: SINGLE_INSTANCE
      EncryptionOptions:
        UseAwsOwnedKey: true
      EngineType: ActiveMQ
      EngineVersion: "5.15.0"
      HostInstanceType: mq.t2.micro
      PubliclyAccessible: false
      Users:
        -
          ConsoleAccess: "true"
          Groups:
            - MyGroup
          Password:
            Ref: "BrokerPassword"
          Username:
            Ref: "BrokerUsername"

Negative test num. 2 - json file

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "Create a basic ActiveMQ broker",
  "Resources": {
    "BasicBroker2": {
      "Type": "AWS::AmazonMQ::Broker",
      "Properties": {
        "BrokerName": "MyBasicBroker",
        "DeploymentMode": "SINGLE_INSTANCE",
        "EncryptionOptions": {
          "UseAwsOwnedKey": true
        },
        "EngineType": "ActiveMQ",
        "EngineVersion": "5.15.0",
        "HostInstanceType": "mq.t2.micro",
        "Users": [
          {
            "ConsoleAccess": "true",
            "Groups": [
              "MyGroup"
            ],
            "Password": {
              "Ref": "BrokerPassword"
            },
            "Username": {
              "Ref": "BrokerUsername"
            }
          }
        ],
        "AutoMinorVersionUpgrade": "false"
      }
    }
  }
}