Rule: S3 Buckets Should Enforce SSL

Rule Description

Troubleshooting Steps

2. 1.

   Verify SSL Configuration: Check the bucket's SSL configuration to ensure SSL is enabled. Navigate to the AWS S3 Management Console and select the target bucket. Click on the "Properties" tab and review the encryption settings.

4. 2.

   Evaluate SSL Policy: Confirm that appropriate SSL policies are implemented. Ensure SSL/TLS protocols are correctly configured to meet NIST 800-53 Revision 5 standards.

6. 3.

   Audit Bucket Policies: Review the bucket policies associated with S3 buckets to verify if there are any misconfigurations. Ensure SSL-related policies and permissions are correctly defined to enforce encryption.

8. 4.

   Test SSL Connectivity: Utilize external tools or CLI commands to test the SSL connectivity with the S3 bucket. This will help identify any potential issues in the SSL configuration.

10. 5.

    Monitor Security Logs: Enable and monitor S3 access logs and CloudTrail logs to identify any unauthorized access attempts or compliance violations related to SSL enforcement.

Necessary Codes

2. 1.
   Enable SSL for newly created buckets using AWS CLI:

aws s3api put-bucket-policy --bucket <bucket-name> --policy '{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "EnforceSSL",
      "Effect": "Deny",
      "Principal": "*",
      "Action": "s3:*",
      "Resource": "arn:aws:s3:::<bucket-name>/*",
      "Condition": {
        "Bool": {
          "aws:SecureTransport": "false"
        }
      }
    }
  ]
}'

2. 1.
   Update SSL configuration for an existing bucket using AWS CLI:

aws s3api put-bucket-policy --bucket <bucket-name> --policy '{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "EnforceSSL",
      "Effect": "Deny",
      "Principal": "*",
      "Action": "s3:*",
      "Resource": "arn:aws:s3:::<bucket-name>/*",
      "Condition": {
        "Bool": {
          "aws:SecureTransport": "false"
        }
      }
    }
  ]
}'

<bucket-name>

Step-by-Step Guide for Remediation

2. 1.

   Open the AWS Management Console and navigate to the Amazon S3 service.

4. 2.

   Identify the target S3 bucket for SSL enforcement.

6. 3.

   Click on the bucket name to access the bucket properties.

8. 4.

   In the bucket properties, navigate to the "Permissions" tab.

10. 5.

    Scroll down to the "Bucket Policy" section and click on "Edit."

12. 6.

    In the bucket policy editor, add or update the policy using the necessary code mentioned above.

14. 7.

    Replace

    <bucket-name>

    with the actual name of the S3 bucket in the code.

16. 8.

    Save the bucket policy.

18. 9.

    Once the policy is saved, SSL enforcement will be in effect for the S3 bucket. Any attempt to access the bucket without SSL will be denied.

20. 10.

    Monitor the S3 bucket, CloudTrail logs, and security alerts for any potential SSL-related issues or unauthorized access attempts.