CVE-2017-5635 : What You Need to Know

Apache NiFi versions 0.7.0, 0.7.1, 1.1.0, and 1.1.1 are affected by a vulnerability that allows unauthorized access in a cluster setup.

Understanding CVE-2017-5635

Apache NiFi versions prior to 0.7.2 and 1.x before 1.1.2 are susceptible to retaining the original node identity instead of the anonymous user's identity in a cluster environment.

What is CVE-2017-5635?

This CVE describes a security issue in Apache NiFi where the identity of the original node is maintained instead of being replaced with the anonymous user's identity when a request is replicated to another node in a cluster setup.

The Impact of CVE-2017-5635

The vulnerability could lead to unauthorized access within the cluster environment, potentially exposing sensitive data to unauthorized users.

Technical Details of CVE-2017-5635

Apache NiFi vulnerability details and affected systems.

Vulnerability Description

When an anonymous user request is replicated to another node in a cluster, the originating node's identity is used instead of the anonymous user's, leading to unauthorized access.

Affected Systems and Versions

Product: Apache NiFi
Vendor: Apache Software Foundation
Affected Versions: 0.7.0, 0.7.1, 1.1.0, 1.1.1

Exploitation Mechanism

Unauthorized users can exploit this vulnerability by making requests that are replicated to other nodes in the cluster, gaining access to data they are not authorized to view.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2017-5635 vulnerability.

Immediate Steps to Take

Upgrade Apache NiFi to version 0.7.2 or 1.1.2 or later to address the issue.
Restrict access to the cluster to authorized users only.

Long-Term Security Practices

Regularly monitor and audit cluster access logs for any unauthorized activities.
Implement strong authentication mechanisms to verify user identities within the cluster.

Patching and Updates

Apply security patches provided by Apache Software Foundation to fix the vulnerability and enhance cluster security.