CVE-2024-56512 is a security vulnerability identified in Apache NiFi, specifically affecting versions 1.10.0 through 2.0.0. This vulnerability is due to missing fine-grained authorization checks when creating new Process Groups.
Nature of the Vulnerability
When creating a new Process Group in Apache NiFi, the framework did not perform authorization checks for the following:
- Parameter Contexts: These are collections of parameters that can be referenced by NiFi components.
- Referenced Controller Services: These provide shared services like database connections that can be used by various components.
- Referenced Parameter Providers: These allow for external parameter management.
Because of this oversight, authenticated users with the authority to create Process Groups could potentially download non-sensitive Parameter values or utilize components that they were otherwise not authorized to use.
Exploitation Scenarios
The exploitation of this vulnerability is constrained to authenticated users who already have permission to create Process Groups. It is further limited to scenarios where component-based authorization policies are implemented. Despite the limited scope, it poses a risk of unauthorized access to certain resources within the systems.
Severity and Impact
This vulnerability is classified as having a low impact due to the following reasons:
- It requires authenticated access, limiting the pool of potential attackers.
- It affects specific deployments with component-based authorization policies.
However, addressing this vulnerability is essential to maintain the integrity and security of the system by preventing unauthorized access.
Mitigation and Patching
To mitigate the risk posed by CVE-2024-56512, it is highly recommended to upgrade to Apache NiFi version 2.1.0. The updated version includes enhanced authorization checks that ensure only authorized users can reference Parameter Contexts, Controller Services, and Parameter Providers during the creation of Process Groups.
