The Global Namespace Risk: Universal Bucket Hijacking Technique for Cloud Data Exfiltration

Key Points:

• A newly identified bucket hijacking technique exploits the global uniqueness of storage bucket names across major cloud service providers (CSPs), allowing attackers to reroute data streams to their own accounts.
• The impact includes potential exfiltration of sensitive data and logs, as attackers can delete a target bucket and recreate it under their control, affecting services like Google Cloud Logging, AWS S3, and Azure Monitor.
• Organizations should implement strict IAM permissions, enforce data perimeter controls, and monitor for bucket deletion events to mitigate this risk.

Technical Details: The attack leverages permissions such as storage.buckets.delete and storage.objects.delete to redirect data streams without needing granular update permissions. This vulnerability is applicable across multiple CSPs due to the shared architectural flaw.

MITRE ATT&CK Techniques:

• None mentioned

IOCs Mentioned:

• None mentioned