Ensure your S3 buckets do not allow full access to authenticated users
Ensure that your S3 buckets are not exposed to allow aws authenticated users to have full access on your buckets. This is considered security best practice and should always be done. Ensuring this is enabled will help with NIST,HIPPA, GDPR and PCI-DSS compliance.
Select the Name hyperlink for the S3 bucket you would like to check.
Under Permissions validate there is no Public banner for this bucket.
If you have a Public banner and have Yes under Public access for List objects, Write objects, Read bucket permissions and Write bucket permissions set for Any AWS user, your bucket is currently exposed to authenticated users with full access.
Select Everyone then remove all check marks listed on the property page.
Repeat the outlined steps for all of your S3 buckets.
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