2FAuth Group Deletion Race Condition Vulnerability

A group deletion race condition has been identified in 2FAuth version 5.5.0. This vulnerability causes data inconsistencies and orphaned accounts when a group is deleted while other operations, such as account assignments, are still pending. The application fails to properly manage concurrent deletion operations, leading to errors and unresolved data references. As a result, affected accounts may experience a disrupted service.

Impact

Exploitation of this vulnerability leads to data corruption, creating orphaned accounts and causing an inconsistent application state. Additionally, it can disrupt service for the affected accounts.

Reproduction

The vulnerability can be reproduced by deleting a group while other operations, such as assigning accounts to that group, are still in progress. This can be done by initiating concurrent group deletion and account assignment processes, which will trigger the race condition and result in data inconsistencies and orphaned account references.

Remediation

Short-term fixes include implementing proper locking mechanisms during group operations, adding validation checks to ensure groups have not been deleted before performing assignments, and applying optimistic locking strategies. Long-term solutions involve architectural changes to group operation management, database modifications to enforce integrity constraints, and API enhancements for better version control and error handling.