12 - S3 Bucket Public Read ACP Access

Ensure your S3 buckets do not allow write access to anonymous users

Ensure that your S3 buckets are not exposed to allow anonymous users write 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.

Audit & Remediation

Login into your AWS account
Navigate to the S3 service at: https://console.aws.amazon.com/s3
On the left hand panel select Buckets.

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 Write objects, your bucket is currently exposed to anonymous users with write 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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