Rule: S3 Buckets Should Enforce SSL
This rule ensures S3 buckets enforce SSL for enhanced security measures.
| Rule | S3 buckets should enforce SSL |
| Framework | NIST 800-53 Revision 5 |
| Severity | ✔ Medium |
Ensuring S3 Buckets Enforce SSL for NIST 800-53 Revision 5 Compliance
Overview
NIST 800-53 Revision 5 provides a comprehensive set of security controls for federal information systems and organizations to improve security and privacy. One of the requirements is that data in transit should be protected using secure protocols such as SSL/TLS. When dealing with AWS S3 buckets, enforcing SSL (using HTTPS for data transfer) is an important step in complying with these guidelines.
Enforcing SSL on S3 Buckets
To ensure that your S3 buckets comply with NIST 800-53 Revision 5 standards for data in transit, you must enforce the use of SSL (using the HTTPS protocol) by setting up a bucket policy that denies any non-SSL requests.
Troubleshooting Steps
If your bucket is not correctly enforcing SSL, you should:
- 1.Verify that the bucket policy is correctly in place and configured.
- 2.Check for any other conflicting bucket policies or permissions.
- 3.Ensure you have the necessary permissions to view and modify bucket policies.
Required Configuration
The following is the necessary JSON policy code to enforce SSL on S3 buckets:
{
"Version": "2012-10-17",
"Id": "ExamplePolicy",
"Statement": [
{
"Sid": "AllowSSLRequestsOnly",
"Effect": "Deny",
"Principal": "*",
"Action": "s3:*",
"Resource": [
"arn:aws:s3:::YourBucketName",
"arn:aws:s3:::YourBucketName/*"
],
"Condition": {
"Bool": {
"aws:SecureTransport": "false"
}
}
}
]
}
Replace
YourBucketNameStep by Step Guide for Remediation
- 1.Login to the AWS Management Console.
- 2.Navigate to the S3 service.
- 3.Select the bucket you wish to enforce SSL on.
- 4.Click on the 'Permissions' tab.
- 5.Scroll down to 'Bucket Policy' and click 'Edit'.
- 6.Copy the JSON policy provided above into the bucket policy editor.
- 7.Replace
with your actual bucket's name.YourBucketName - 8.Click 'Save changes' to apply the policy.
CLI Command
If you prefer using the AWS CLI for automation or scripting purposes, the following command can be used to set the bucket policy:
aws s3api put-bucket-policy --bucket YourBucketName --policy file://policy.json
Ensure that you have created a file named
policy.jsonThis command requires the AWS CLI to be installed and configured with the required permissions to update the bucket policy.
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