Cis AWS Database 3.4

3.4 Ensure to Configure Security Groups (Manual)

Description

Configuring security groups benefits the user because it helps manage networks within the database and gives only certain permission for traffic that leaves and enters the database.

Rationale

Security groups act as virtual firewalls that control inbound and outbound traffic to RDS instances. Proper configuration ensures only authorized access.

Impact

Allows certain users to access the instance and it only allows them to work within that network.

Audit Procedure

Using AWS Console

1. Sign into the AWS Management Console

   • Sign into the AWS Management Console at https://console.aws.amazon.com/ with your AWS account credentials.

2. Open the Amazon RDS Console

   • Navigate to the service using the Find Services search bar or by directly accessing the console at https://console.aws.amazon.com/rds/.

3. Select the RDS Instance

   • Choose the Amazon RDS instance for which you want to configure security groups. Click on the instance name to access its details page.

4. Navigate to the Connectivity & Security Section

   • In the instance details page, navigate to the Connectivity & Security or "Security" section.

5. View and Modify Existing Security Groups

   • Under the Security section, you will see the existing security groups associated with the RDS instance.
   • Take note of the existing security groups and their inbound and outbound rules.

6. Create a New Security Group

   • If you need to create a new security group for the RDS instance
   • Click the Create New Security Group button.
   • Provide a name and description for the new security group.
   • Configure the inbound and outbound rules to control network traffic to and from the RDS instance.
   • Click "Create" to create the new security group.

7. Modify Security Group Rules

   • To modify the rules of an existing security group, click on the security group name or the Modify button next to it.
   • You can add, edit, or delete inbound and outbound rules on the security group details page.
   • Specify each rule's source IP addresses, port ranges, and protocols.
   • Click Save or Apply Changes to update the security group rules.

8. Associate Security Groups

   • To associate a security group with the RDS instance, navigate to the Connectivity & Security or Security section of the instance details page.
   • Click Modify next to the VPC security groups option.
   • Select the desired security groups from the list.
   • Click Save or Apply Changes to associate them with the RDS instance.

9. Verify and Test Security Group Configuration

   • Review the security group settings to match your network access requirements.
   • Test the connectivity to the RDS instance by attempting to access it from authorized IP addresses or applications.

10. Monitor and Update Security Groups

    • Regularly monitor the network traffic and access patterns to your RDS instance.
    • Update the security group rules as needed to reflect changes in your network access requirements.

Expected Result

Security groups should be configured with the principle of least privilege, allowing only necessary inbound traffic from trusted sources on required ports.

Remediation

Using AWS Console

Follow the audit steps above to review and configure security groups. Remove overly permissive rules (e.g., 0.0.0.0/0) and restrict access to specific IP ranges and ports.

Default Value

The default security group allows all outbound traffic and restricts inbound traffic to the same security group.

References

1. https://aws.amazon.com/products/databases/

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Level 1 | Manual