How can this issue be corrected in the MOST secure manner?
Add the bucket name to the AllowedBuckets section of the CodeBuild project settings. Update the build spec to use the AWS CLI to download the database population script.
Modify the S3 bucket settings to enable HTTPS basic authentication and specify a token. Update the build spec to use cURL to pass the token and download the database population script.
Remove unauthenticated access from the S3 bucket with a bucket policy. Modify the service role for the CodeBuild project to include Amazon S3 access. Use the AWS CLI to download the database population script.
Remove unauthenticated access from the S3 bucket with a bucket policy. Use the AWS CLI to download the database population script using an IAM access key and a secret access key.
Explanations:
While adding the bucket to the AllowedBuckets section is a step toward restricting access, it does not prevent unauthenticated requests from being made initially. This approach does not secure the S3 bucket itself and relies on CodeBuild settings, which may not meet the security team’s requirements.
HTTPS basic authentication is not supported for Amazon S3. S3 uses AWS credentials for access control. Using cURL with a token would not secure the bucket as required by the security team and could expose the token, leading to potential security risks.
This option correctly removes unauthenticated access by implementing a bucket policy that denies such access. It then modifies the CodeBuild project’s service role to include permissions for S3 access, allowing the use of the AWS CLI to securely download the script, adhering to the security team’s policy.
Using IAM access keys and secret keys for accessing S3 is not a best practice due to security risks associated with key management. Moreover, this method would not inherently secure the S3 bucket against unauthorized access, contradicting the security team’s policy.
It appears that the answer is:
Remove unauthenticated access from the S3 bucket with a bucket policy. Modify the service role for the CodeBuild project to include Amazon S3 access. Use the AWS CLI to download the database population script.