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Ensure RDS instances are not publicly reachable

RDS instances should be accessible only through well-defined paths and only from networks you manage. We recommend to disable 'Public access' if possible which removes the public IP address assigned to the database instance.

Category

Controls

Medium

Applies to

AWS

Coverage

1 queries

Asset types

1 covered

Overview

RDS instances should be accessible only through well-defined paths and only from networks you manage. We recommend to disable 'Public access' if possible which removes the public IP address assigned to the database instance.

Remediation guidance

From the Console

Perform the following action to turn off public accessibility:

  1. Open the security settings using the "Open in AWS" menu option

  2. Click Modify

  3. Navigate to Connectivity and click Additional configurations

  4. Select the No public access button

  5. Click Continue and then Modify DB instance

Default Value

By default, public access is not allowed in your database instance. Only Amazon resources inside the VPC can connect to your database.

References

  1. Hiding a DB instance in a VPC from the internet

Service-wide remediation

Recommended when many resources are affected: fix the platform baseline first so new resources inherit the secure setting, then remediate the existing flagged resources in batches.

AWS

Use AWS Organizations guardrails, AWS Config rules or conformance packs where they fit, approved account baselines, and IaC modules so new resources inherit the secure setting.

Operational rollout

  1. Fix the baseline first at the account, subscription, project, cluster, or tenant scope that owns this control.
  2. Remediate the currently affected resources in batches, starting with internet-exposed and production assets.
  3. Re-scan and track approved exceptions with an owner and expiry date.

Query logic

These are the stored checks tied to this control.

RDS instances are not publicly reachable

Connectors

AWS

Covered asset types

DBInstance

Expected check: eq []

{dbInstances(where:{publicAccessBlocked:false}){...AssetFragment}}
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