Exposed Buckets: How S3, GCS, and Azure Blob Are Passively Discovered and Exploited

Before running a single scanner, a researcher opens bucket-stream, connects to certstream, and within minutes has a list of S3 buckets derived from the target company's subdomains. No packet was sent to the target. No log was written to the SIEM. Most security teams treat bucket exposure as a configuration problem fixed with a click on "Block...