Cloud Bucket Hijacking Technique Discovered
Palo Alto Networks has identified a cloud storage vulnerability known as bucket hijacking that affects multiple major cloud service providers. This technique allows attackers to reroute sensitive data from an organization’s active data streams to their own storage environments by exploiting the unique naming conventions of cloud storage buckets.
The research highlights that an attacker can gain access by deleting an existing storage bucket and then immediately recreating it under their own account, thus redirecting data streams without alerting the targeted organization. This risk is inherent in the architectural choices made by cloud service providers, where bucket names are globally unique, exposing a critical security flaw.
The attack process involves compromising a cloud environment to obtain permissions necessary for deleting a storage bucket. Following deletion, the attacker swiftly recreates the bucket under their control, enabling the routing of potentially sensitive logs and critical data to their environment. The research details specific examples, including simulating this attack using Google Cloud Services and AWS, revealing how this method can be applied across platforms.
Defensive Context
Organizations utilizing cloud services must be vigilant about this type of attack, particularly those that depend on data logging and streaming services. Companies that manage sensitive information and utilize services from Google, AWS, or Azure should assess whether their configurations expose them to this vulnerability. Organizations less reliant on cloud storage or that operate on a different architecture may not need to prioritize this issue as closely.
Why This Matters
The bucket hijacking technique can lead to severe data breaches if exploited. Organizations handling sensitive information, especially in regulated sectors such as healthcare and finance, are at risk if their cloud configurations allow this attack. Data that may be redirected includes critical logs, user information, or proprietary business data, potentially leading to compliance breaches or loss of intellectual property.
Defender Considerations
Defending against this technique requires tightly controlled permissions, especially concerning bucket deletion. Organizations should audit their identity access policies to minimize the risk associated with over-privileged roles that grant unnecessary permissions for critical processes. The vulnerability stemmed from the ability to modify data stream configurations without closely monitored permissions, indicating that review mechanisms are essential to prevent unauthorized actions.
Indicators of Compromise (IOCs)
Currently, no specific IOCs have been disclosed in the article. However, organizations should be attuned to any unauthorized changes to storage configurations, particularly deletions or modifications of storage buckets.
