CVE-2024-56512: Apache NiFi: Missing Complete Authorization for Parameter and Service References

[David Handermann <exceptionfactory () apache org>]

Affected versions:

- Apache NiFi 1.10.0 through 2.0.0

Description:

Apache NiFi 1.10.0 through 2.0.0 are missing fine-grained authorization checking for Parameter Contexts, referenced 
Controller Services, and referenced Parameter Providers, when creating new Process Groups.

Creating a new Process Group can include binding to a Parameter Context, but in cases where the Process Group did not 
reference any Parameter values, the framework did not check user authorization for the bound Parameter Context. Missing 
authorization for a bound Parameter Context enabled clients to download non-sensitive Parameter values after creating 
the Process Group.

Creating a new Process Group can also include referencing existing Controller Services or Parameter Providers. The 
framework did not check user authorization for referenced Controller Services or Parameter Providers, enabling clients 
to create Process Groups and use these components that were otherwise unauthorized.

This vulnerability is limited in scope to authenticated users authorized to create Process Groups. The scope is further 
limited to deployments with component-based authorization policies. Upgrading to Apache NiFi 2.1.0 is the recommended 
mitigation, which includes authorization checking for Parameter and Controller Service references on Process Group 
creation.

This issue is being tracked as NIFI-13976 

Credit:

Matt Gilman (finder)

References:

https://nifi.apache.org/
https://www.cve.org/CVERecord?id=CVE-2024-56512
https://issues.apache.org/jira/browse/NIFI-13976