README.md

December 5, 2025 · View on GitHub

Terraform module to deploy AWS Security Hub.

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Introduction

This module enables AWS Security Hub in one region of one account and optionally sets up an SNS topic to receive notifications of its findings.

In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic approach for updating versions to avoid unexpected changes.

Examples

Here is an example of using this module:

examples/complete - complete example of using this module

Requirements

Name	Version
terraform	>= 1.0
aws	>= 2

Providers

Name	Version
aws	>= 2

Modules

Name	Source	Version
imported_findings_label	cloudposse/label/null	0.25.0
sns_kms_key	cloudposse/kms-key/aws	0.12.2
sns_kms_key_label	cloudposse/label/null	0.25.0
sns_topic	cloudposse/sns-topic/aws	0.21.0
this	cloudposse/label/null	0.25.0

Resources

Name	Type
aws_cloudwatch_event_rule.imported_findings	resource
aws_cloudwatch_event_target.imported_findings	resource
aws_securityhub_account.this	resource
aws_securityhub_finding_aggregator.this	resource
aws_securityhub_standards_subscription.this	resource
aws_caller_identity.this	data source
aws_iam_policy_document.sns_kms_key_policy	data source
aws_partition.this	data source
aws_region.this	data source

Inputs

Name	Description	Type	Default	Required
additional_tag_map	Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`. This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration.	`map(string)`	`{}`	no
attributes	ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`, in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the `delimiter` and treated as a single ID element.	`list(string)`	`[]`	no
cloudwatch_event_rule_pattern_detail_type	The detail-type pattern used to match events that will be sent to SNS. For more information, see: https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/CloudWatchEventsandEventPatterns.html	`string`	`"Security Hub Findings - Imported"`	no
context	Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as `null` to use default value. Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged.	`any`	{ "additional_tag_map": {}, "attributes": [], "delimiter": null, "descriptor_formats": {}, "enabled": true, "environment": null, "id_length_limit": null, "label_key_case": null, "label_order": [], "label_value_case": null, "labels_as_tags": [ "unset" ], "name": null, "namespace": null, "regex_replace_chars": null, "stage": null, "tags": {}, "tenant": null }	no
create_sns_topic	Flag to indicate whether an SNS topic should be created for notifications If you want to send findings to a new SNS topic, set this to true and provide a valid configuration for subscribers	`bool`	`false`	no
delimiter	Delimiter to be used between ID elements. Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.	`string`	`null`	no
descriptor_formats	Describe additional descriptors to be output in the `descriptors` output map. Map of maps. Keys are names of descriptors. Values are maps of the form `{<br/> format = string<br/> labels = list(string)<br/>}` (Type is `any` so the map values can later be enhanced to provide additional options.) `format` is a Terraform format string to be passed to the `format()` function. `labels` is a list of labels, in order, to pass to `format()` function. Label values will be normalized before being passed to `format()` so they will be identical to how they appear in `id`. Default is `{}` (`descriptors` output will be empty).	`any`	`{}`	no
enable_default_standards	Flag to indicate whether default standards should be enabled	`bool`	`true`	no
enabled	Set to false to prevent the module from creating any resources	`bool`	`null`	no
enabled_standards	A list of standards/rulesets to enable See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/securityhub_standards_subscription#argument-reference The possible values are: - standards/aws-foundational-security-best-practices/v/1.0.0 - ruleset/cis-aws-foundations-benchmark/v/1.2.0 - standards/pci-dss/v/3.2.1	`list(any)`	`[]`	no
environment	ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'	`string`	`null`	no
finding_aggregator_enabled	Flag to indicate whether a finding aggregator should be created If you want to aggregate findings from one region, set this to `true`. For more information, see: https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/securityhub_finding_aggregator	`bool`	`false`	no
finding_aggregator_linking_mode	Linking mode to use for the finding aggregator. The possible values are: - `ALL_REGIONS` - Aggregate from all regions - `ALL_REGIONS_EXCEPT_SPECIFIED` - Aggregate from all regions except those specified in `var.finding_aggregator_regions` - `SPECIFIED_REGIONS` - Aggregate from regions specified in `finding_aggregator_enabled`	`string`	`"ALL_REGIONS"`	no
finding_aggregator_regions	A list of regions to aggregate findings from. This is only used if `finding_aggregator_enabled` is `true`.	`list(string)`	`[]`	no
id_length_limit	Limit `id` to this many characters (minimum 6). Set to `0` for unlimited length. Set to `null` for keep the existing setting, which defaults to `0`. Does not affect `id_full`.	`number`	`null`	no
imported_findings_notification_arn	The ARN for an SNS topic to send findings notifications to. This is only used if create_sns_topic is false. If you want to send findings to an existing SNS topic, set the value of this to the ARN of the existing topic and set create_sns_topic to false.	`string`	`null`	no
label_key_case	Controls the letter case of the `tags` keys (label names) for tags generated by this module. Does not affect keys of tags passed in via the `tags` input. Possible values: `lower`, `title`, `upper`. Default value: `title`.	`string`	`null`	no
label_order	The order in which the labels (ID elements) appear in the `id`. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.	`list(string)`	`null`	no
label_value_case	Controls the letter case of ID elements (labels) as included in `id`, set as tag values, and output by this module individually. Does not affect values of tags passed in via the `tags` input. Possible values: `lower`, `title`, `upper` and `none` (no transformation). Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs. Default value: `lower`.	`string`	`null`	no
labels_as_tags	Set of labels (ID elements) to include as tags in the `tags` output. Default is to include all labels. Tags with empty values will not be included in the `tags` output. Set to `[]` to suppress all generated tags. Notes: The value of the `name` tag, if included, will be the `id`, not the `name`. Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be changed in later chained modules. Attempts to change it will be silently ignored.	`set(string)`	[ "default" ]	no
name	ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a `tag`. The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input.	`string`	`null`	no
namespace	ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique	`string`	`null`	no
regex_replace_chars	Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.	`string`	`null`	no
stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	`string`	`null`	no
subscribers	Required configuration for subscibres to SNS topic.	map(object({ protocol = string # The protocol to use. The possible values for this are: sqs, sms, lambda, application. (http or https are partially supported, see below) (email is an option but is unsupported, see below). endpoint = string # The endpoint to send data to, the contents will vary with the protocol. (see below for more information) endpoint_auto_confirms = bool # Boolean indicating whether the end point is capable of auto confirming subscription e.g., PagerDuty (default is false) raw_message_delivery = bool # Boolean indicating whether or not to enable raw message delivery (the original message is directly passed, not wrapped in JSON with the original message in the message property) (default is false) }))	`{}`	no
tags	Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`). Neither the tag keys nor the tag values will be modified by this module.	`map(string)`	`{}`	no
tenant	ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for	`string`	`null`	no

Outputs

Name	Description
enabled_subscriptions	A list of subscriptions that have been enabled
sns_topic	The SNS topic that was created
sns_topic_subscriptions	The SNS topic that was created

Check out these related projects.

terraform-null-label - Terraform module designed to generate consistent names and tags for resources. Use terraform-null-label to implement a strict naming convention.

References

For additional context, refer to some of these links.

Terraform Standard Module Structure - HashiCorp's standard module structure is a file and directory layout we recommend for reusable modules distributed in separate repositories.
Terraform Module Requirements - HashiCorp's guidance on all the requirements for publishing a module. Meeting the requirements for publishing a module is extremely easy.
Terraform random_integer Resource - The resource random_integer generates random values from a given range, described by the min and max attributes of a given resource.
Terraform Version Pinning - The required_version setting can be used to constrain which versions of the Terraform CLI can be used with your configuration

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✨ Contributing

This project is under active development, and we encourage contributions from our community.

Many thanks to our outstanding contributors:

For 🐛 bug reports & feature requests, please use the issue tracker.

In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.

Review our Code of Conduct and Contributor Guidelines.
Fork the repo on GitHub
Clone the project to your own machine
Commit changes to your own branch
Push your work back up to your fork
Submit a Pull Request so that we can review your changes

NOTE: Be sure to merge the latest changes from "upstream" before making a pull request!

Running Terraform Tests

We use Atmos to streamline how Terraform tests are run. It centralizes configuration and wraps common test workflows with easy-to-use commands.

All tests are located in the test/ folder.

Under the hood, tests are powered by Terratest together with our internal Test Helpers library, providing robust infrastructure validation.

Setup dependencies:

Install Atmos (installation guide)
Install Go 1.24+ or newer
Install Terraform or OpenTofu

To run tests:

Run all tests:
```
atmos test run
```
Clean up test artifacts:
```
atmos test clean
```
Explore additional test options:
```
atmos test --help
```

The configuration for test commands is centrally managed. To review what's being imported, see the atmos.yaml file.

Learn more about our automated testing in our documentation or implementing custom commands with atmos.

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License

Preamble to the Apache License, Version 2.0

Complete license is available in the LICENSE file.

Licensed to the Apache Software Foundation (ASF) under one
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regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

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