Cis GCP Foundations 7.1

7.1 Ensure That BigQuery Datasets Are Not Anonymously or Publicly Accessible (Automated)

Profile Applicability

• Level 1

Description

It is recommended that the IAM policy on BigQuery datasets does not allow anonymous and/or public access.

Rationale

Granting permissions to allUsers or allAuthenticatedUsers allows anyone to access the dataset. Such access might not be desirable if sensitive data is being stored in the dataset. Therefore, ensure that anonymous and/or public access to a dataset is not allowed.

Impact

The dataset is not publicly accessible. Explicit modification of IAM privileges would be necessary to make them publicly accessible.

Audit

From Google Cloud Console

1. Go to BigQuery by visiting: https://console.cloud.google.com/bigquery.
2. Select a dataset from Resources.
3. Click SHARING near the right side of the window and select Permissions.
4. Validate that none of the attached roles contain allUsers or allAuthenticatedUsers.

From Google Cloud CLI

List the name of all datasets.

bq ls

Retrieve each dataset details using the following command:

bq show PROJECT_ID:DATASET_NAME

Ensure that allUsers and allAuthenticatedUsers have not been granted access to the dataset.

Remediation

From Google Cloud Console

1. Go to BigQuery by visiting: https://console.cloud.google.com/bigquery.
2. Select the dataset from 'Resources'.
3. Click SHARING near the right side of the window and select Permissions.
4. Review each attached role.
5. Click the delete icon for each member allUsers or allAuthenticatedUsers. On the popup click Remove.

From Google Cloud CLI

List the name of all datasets.

bq ls

Retrieve the data set details:

bq show --format=prettyjson PROJECT_ID:DATASET_NAME > PATH_TO_FILE

In the access section of the JSON file, update the dataset information to remove all roles containing allUsers or allAuthenticatedUsers.

Update the dataset:

bq update --source PATH_TO_FILE PROJECT_ID:DATASET_NAME

Prevention

You can prevent Bigquery dataset from becoming publicly accessible by setting up the Domain restricted sharing organization policy at: https://console.cloud.google.com/iam-admin/orgpolicies/iam-allowedPolicyMemberDomains.

Default Value

By default, BigQuery datasets are not publicly accessible.

References

1. https://cloud.google.com/bigquery/docs/dataset-access-controls

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