Elasticsearch Without IAM Authentication

• Query id: 5c666ed9-b586-49ab-9873-c495a833b705
• Query name: Elasticsearch Without IAM Authentication
• Platform: CloudFormation
• Severity: Medium
• Category: Access Control
• URL: Github

Description

AWS Elasticsearch should ensure IAM Authentication
Documentation

Code samples

Code samples with security vulnerabilities

Postitive test num. 1 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: Creates ES
Resources:
  ElasticsearchDomain:
    Type: AWS::Elasticsearch::Domain
    Properties:
      DomainName: "test"
      ElasticsearchVersion: "7.10"
      ElasticsearchClusterConfig:
        DedicatedMasterEnabled: true
        InstanceCount: "2"
        ZoneAwarenessEnabled: true
        InstanceType: "m3.medium.elasticsearch"
        DedicatedMasterType: "m3.medium.elasticsearch"
        DedicatedMasterCount: "3"
      EBSOptions:
        EBSEnabled: true
        Iops: "0"
        VolumeSize: "20"
        VolumeType: "gp2"
      AccessPolicies:
        Version: "2012-10-17"
        Statement:
          - Effect: "Allow"
            Principal:
              AWS: "*"
            Action: "es:*"
            Resource: "arn:aws:es:us-east-1:846973539254:domain/test/*"
      LogPublishingOptions:
        ES_APPLICATION_LOGS:
          CloudWatchLogsLogGroupArn: "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-application-logs"
          Enabled: true
        SEARCH_SLOW_LOGS:
          CloudWatchLogsLogGroupArn: "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-slow-logs"
          Enabled: true
        INDEX_SLOW_LOGS:
          CloudWatchLogsLogGroupArn: "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-index-slow-logs"
          Enabled: true
      AdvancedOptions:
        rest.action.multi.allow_explicit_index: true

Postitive test num. 2 - json file

{
  "Resources": {
    "ElasticsearchDomain": {
      "Type": "AWS::Elasticsearch::Domain",
      "Properties": {
        "DomainName": "test",
        "ElasticsearchVersion": "7.10",
        "ElasticsearchClusterConfig": {
          "DedicatedMasterEnabled": true,
          "InstanceCount": "2",
          "ZoneAwarenessEnabled": true,
          "InstanceType": "m3.medium.elasticsearch",
          "DedicatedMasterType": "m3.medium.elasticsearch",
          "DedicatedMasterCount": "3"
        },
        "EBSOptions": {
          "EBSEnabled": true,
          "Iops": "0",
          "VolumeSize": "20",
          "VolumeType": "gp2"
        },
        "AccessPolicies": {
          "Version": "2012-10-17",
          "Statement": [
            {
              "Effect": "Allow",
              "Principal": {
                "AWS": "*"
              },
              "Action": "es:*",
              "Resource": "arn:aws:es:us-east-1:123456789012:domain/test/*"
            }
          ]
        },
        "LogPublishingOptions": {
          "ES_APPLICATION_LOGS": {
            "CloudWatchLogsLogGroupArn": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-application-logs",
            "Enabled": true
          },
          "SEARCH_SLOW_LOGS": {
            "CloudWatchLogsLogGroupArn": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-slow-logs",
            "Enabled": true
          },
          "INDEX_SLOW_LOGS": {
            "CloudWatchLogsLogGroupArn": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-index-slow-logs",
            "Enabled": true
          }
        },
        "AdvancedOptions": {
          "rest.action.multi.allow_explicit_index": true
        }
      }
    }
  },
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "Creates RDS Cluster"
}

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: Creates ES
Resources:
  ElasticsearchDomain:
    Type: AWS::Elasticsearch::Domain
    Properties:
      DomainName: "test"
      ElasticsearchVersion: "7.10"
      ElasticsearchClusterConfig:
        DedicatedMasterEnabled: true
        InstanceCount: "2"
        ZoneAwarenessEnabled: true
        InstanceType: "m3.medium.elasticsearch"
        DedicatedMasterType: "m3.medium.elasticsearch"
        DedicatedMasterCount: "3"
      EBSOptions:
        EBSEnabled: true
        Iops: "0"
        VolumeSize: "20"
        VolumeType: "gp2"
      AccessPolicies:
        Version: "2012-10-17"
        Statement:
          - Effect: "Allow"
            Principal:
              AWS: "arn:aws:iam::123456789012:user/es-user"
            Action: "es:*"
            Resource: "arn:aws:es:us-east-1:846973539254:domain/test/*"
      LogPublishingOptions:
        ES_APPLICATION_LOGS:
          CloudWatchLogsLogGroupArn: "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-application-logs"
          Enabled: true
        SEARCH_SLOW_LOGS:
          CloudWatchLogsLogGroupArn: "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-slow-logs"
          Enabled: true
        INDEX_SLOW_LOGS:
          CloudWatchLogsLogGroupArn: "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-index-slow-logs"
          Enabled: true
      AdvancedOptions:
        rest.action.multi.allow_explicit_index: true

Negative test num. 2 - json file

{
  "Resources": {
    "ElasticsearchDomain": {
      "Type": "AWS::Elasticsearch::Domain",
      "Properties": {
        "DomainName": "test",
        "ElasticsearchVersion": "7.10",
        "ElasticsearchClusterConfig": {
          "DedicatedMasterEnabled": true,
          "InstanceCount": "2",
          "ZoneAwarenessEnabled": true,
          "InstanceType": "m3.medium.elasticsearch",
          "DedicatedMasterType": "m3.medium.elasticsearch",
          "DedicatedMasterCount": "3"
        },
        "EBSOptions": {
          "EBSEnabled": true,
          "Iops": "0",
          "VolumeSize": "20",
          "VolumeType": "gp2"
        },
        "AccessPolicies": {
          "Version": "2012-10-17",
          "Statement": [
            {
              "Effect": "Allow",
              "Principal": {
                "AWS": "arn:aws:iam::123456789012:user/es-user"
              },
              "Action": "es:*",
              "Resource": "arn:aws:es:us-east-1:123456789012:domain/test/*"
            }
          ]
        },
        "LogPublishingOptions": {
          "ES_APPLICATION_LOGS": {
            "CloudWatchLogsLogGroupArn": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-application-logs",
            "Enabled": true
          },
          "SEARCH_SLOW_LOGS": {
            "CloudWatchLogsLogGroupArn": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-slow-logs",
            "Enabled": true
          },
          "INDEX_SLOW_LOGS": {
            "CloudWatchLogsLogGroupArn": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-index-slow-logs",
            "Enabled": true
          }
        },
        "AdvancedOptions": {
          "rest.action.multi.allow_explicit_index": true
        }
      }
    }
  },
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "Creates RDS Cluster"
}