Elasticsearch logs disabled

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Metadata

Id: edbd62d4-8700-41de-b000-b3cfebb5e996

Cloud Provider: AWS

Platform: CloudFormation

Severity: Medium

Category: Observability

Learn More

Description

Elasticsearch domains must publish slow logs, application logs, and audit logs so you can detect suspicious or malicious activity and perform operational troubleshooting and compliance auditing.

In CloudFormation, AWS::Elasticsearch::Domain resources must define Properties.LogPublishingOptions entries for each relevant log type (INDEX_SLOW_LOGS, SEARCH_SLOW_LOGS, ES_APPLICATION_LOGS, AUDIT_LOGS). For each entry, the Enabled property must be set to true. Resources that omit LogPublishingOptions, omit an Enabled key for a log type, or have Enabled set to false will be flagged.

Secure configuration example (enable each log type and point to an Amazon CloudWatch Logs log group):

MyDomain:
  Type: AWS::Elasticsearch::Domain
  Properties:
    DomainName: my-domain
    LogPublishingOptions:
      INDEX_SLOW_LOGS:
        CloudWatchLogsLogGroupArn: arn:aws:logs:us-east-1:123456789012:log-group:es-index-slow
        Enabled: true
      SEARCH_SLOW_LOGS:
        CloudWatchLogsLogGroupArn: arn:aws:logs:us-east-1:123456789012:log-group:es-search-slow
        Enabled: true
      ES_APPLICATION_LOGS:
        CloudWatchLogsLogGroupArn: arn:aws:logs:us-east-1:123456789012:log-group:es-app-logs
        Enabled: true
      AUDIT_LOGS:
        CloudWatchLogsLogGroupArn: arn:aws:logs:us-east-1:123456789012:log-group:es-audit-logs
        Enabled: true

Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Description: ElasticsearchDomain resource
Resources:
  ElasticsearchDomain:
    Type: "AWS::Elasticsearch::Domain"
    Properties:
      DomainName:
        Ref: DomainName
      ElasticsearchVersion:
        Ref: ElasticsearchVersion
      ElasticsearchClusterConfig:
        InstanceCount: "1"
        InstanceType:
          Ref: InstanceType
      EBSOptions:
        EBSEnabled: "true"
        Iops: 0
        VolumeSize: 10
        VolumeType: standard
      SnapshotOptions:
        AutomatedSnapshotStartHour: "0"
      AccessPolicies:
        Version: "2012-10-17"
        Statement:
          - Effect: Deny
            Principal:
              AWS: "*"
            Action: "es:*"
            Resource: "*"
      LogPublishingOptions:
        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"
        ES_APPLICATION_LOGS:
          CloudWatchLogsLogGroupArn: >-
            arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-application-logs
          Enabled: "true"
        AUDIT_LOGS:
          CloudWatchLogsLogGroupArn: >-
            arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-audit-logs
          Enabled: "true"
      AdvancedOptions:
        rest.action.multi.allow_explicit_index: "true"

{
  "document": [
    {
      "AWSTemplateFormatVersion": "2010-09-09",
      "Description": "ElasticsearchDomain resource",
      "Resources": {
        "ElasticsearchDomain": {
          "Type": "AWS::Elasticsearch::Domain",
          "Properties": {
            "AdvancedOptions": {
              "rest.action.multi.allow_explicit_index": "true"
            },
            "DomainName": {
              "Ref": "DomainName"
            },
            "ElasticsearchVersion": {
              "Ref": "ElasticsearchVersion"
            },
            "ElasticsearchClusterConfig": {
              "InstanceCount": "1",
              "InstanceType": {
                "Ref": "InstanceType"
              }
            },
            "EBSOptions": {
              "Iops": 0,
              "VolumeSize": 10,
              "VolumeType": "standard",
              "EBSEnabled": "true"
            },
            "SnapshotOptions": {
              "AutomatedSnapshotStartHour": "0"
            },
            "AccessPolicies": {
              "Statement": [
                {
                  "Effect": "Deny",
                  "Principal": {
                    "AWS": "*"
                  },
                  "Action": "es:*",
                  "Resource": "*"
                }
              ],
              "Version": "2012-10-17"
            },
            "LogPublishingOptions": {
              "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"
              }
            }
          }
        }
      },
      "id": "c886b8d1-8c44-4f23-ba01-6e30a2f5be7b",
      "file": "C:\\Users\\foo\\Desktop\\Data\\yaml\\yaml.yaml"
    }
  ]
}

Resources:
  ProductionElasticsearch:
    Type: AWS::Elasticsearch::Domain
    Properties:
      EBSOptions:
        EBSEnabled: true
        VolumeSize: 70
        VolumeType: gp2
      ElasticsearchClusterConfig:
        DedicatedMasterCount: 3
        DedicatedMasterEnabled: true
        DedicatedMasterType: omitted
        InstanceCount: 3
        InstanceType: omitted
        ZoneAwarenessConfig:
          AvailabilityZoneCount: 3
        ZoneAwarenessEnabled: true
      ElasticsearchVersion: omitted
      LogPublishingOptions:
        "INDEX_SLOW_LOGS":
          CloudWatchLogsLogGroupArn: !GetAtt ProductionElasticsearchIndexSlowLogs.Arn
          Enabled: true
        "SEARCH_SLOW_LOGS":
          CloudWatchLogsLogGroupArn: !GetAtt ProductionElasticsearchSearchSlowLogs.Arn
          Enabled: true
        "ES_APPLICATION_LOGS":
          CloudWatchLogsLogGroupArn: !GetAtt ProductionElasticsearchApplicationLogs.Arn
          Enabled: true
        "AUDIT_LOGS":
          CloudWatchLogsLogGroupArn: !GetAtt ProductionElasticsearchAuditLogs.Arn
          Enabled: true

Non-Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Description: ElasticsearchDomain resource
Resources:
  ElasticsearchDomain:
    Type: "AWS::Elasticsearch::Domain"
    Properties:
      DomainName:
        Ref: DomainName
      ElasticsearchVersion:
        Ref: ElasticsearchVersion
      ElasticsearchClusterConfig:
        InstanceCount: "1"
        InstanceType:
          Ref: InstanceType
      EBSOptions:
        EBSEnabled: "true"
        Iops: 0
        VolumeSize: 10
        VolumeType: standard
      SnapshotOptions:
        AutomatedSnapshotStartHour: "0"
      AccessPolicies:
        Version: "2012-10-17"
        Statement:
          - Effect: Deny
            Principal:
              AWS: "*"
            Action: "es:*"
            Resource: "*"
      AdvancedOptions:
        rest.action.multi.allow_explicit_index: "true"

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "ElasticsearchDomain resource",
  "Resources": {
    "ElasticsearchDomain": {
      "Type": "AWS::Elasticsearch::Domain",
      "Properties": {
        "DomainName": {
          "Ref": "DomainName"
        },
        "ElasticsearchVersion": {
          "Ref": "ElasticsearchVersion"
        },
        "ElasticsearchClusterConfig": {
          "InstanceCount": "1",
          "InstanceType": {
            "Ref": "InstanceType"
          }
        },
        "EBSOptions": {
          "Iops": 0,
          "VolumeSize": 10,
          "VolumeType": "standard",
          "EBSEnabled": "true"
        },
        "SnapshotOptions": {
          "AutomatedSnapshotStartHour": "0"
        },
        "AccessPolicies": {
          "Version": "2012-10-17",
          "Statement": [
            {
              "Action": "es:*",
              "Resource": "*",
              "Effect": "Deny",
              "Principal": {
                "AWS": "*"
              }
            }
          ]
        },
        "LogPublishingOptions": {
          "SEARCH_SLOW_LOGS": {
            "Enabled": "false",
            "CloudWatchLogsLogGroupArn": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-slow-logs"
          }
        },
        "AdvancedOptions": {
          "rest.action.multi.allow_explicit_index": "true"
        }
      }
    }
  }
}

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "ElasticsearchDomain resource",
  "Resources": {
    "ElasticsearchDomain": {
      "Type": "AWS::Elasticsearch::Domain",
      "Properties": {
        "DomainName": {
          "Ref": "DomainName"
        },
        "ElasticsearchVersion": {
          "Ref": "ElasticsearchVersion"
        },
        "ElasticsearchClusterConfig": {
          "InstanceCount": "1",
          "InstanceType": {
            "Ref": "InstanceType"
          }
        },
        "EBSOptions": {
          "Iops": 0,
          "VolumeSize": 10,
          "VolumeType": "standard",
          "EBSEnabled": "true"
        },
        "SnapshotOptions": {
          "AutomatedSnapshotStartHour": "0"
        },
        "AccessPolicies": {
          "Version": "2012-10-17",
          "Statement": [
            {
              "Action": "es:*",
              "Resource": "*",
              "Effect": "Deny",
              "Principal": {
                "AWS": "*"
              }
            }
          ]
        },
        "LogPublishingOptions": {
          "SEARCH_SLOW_LOGS": {
            "CloudWatchLogsLogGroupArn": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/aes/domains/es-slow-logs"
          }
        },
        "AdvancedOptions": {
          "rest.action.multi.allow_explicit_index": "true"
        }
      }
    }
  }
}