CVE-2017-15703 : Security Advisory and Response

Apache NiFi 1.0.0 - 1.3.0 allows authenticated users without ACL permissions to upload a template containing harmful code, leading to a denial of service through a Java deserialization attack. The issue is resolved in Apache NiFi 1.4.0.

Understanding CVE-2017-15703

This CVE involves a vulnerability in Apache NiFi versions 1.0.0 - 1.3.0 that allows authenticated users lacking ACL permissions to upload malicious templates, potentially causing a denial of service via a Java deserialization attack.

What is CVE-2017-15703?

Users with valid client certificates but no ACL permissions can upload templates with harmful code
Vulnerability leads to a denial of service through a Java deserialization attack

The Impact of CVE-2017-15703

The vulnerability allows unauthorized users to disrupt system operations by uploading malicious templates, potentially causing denial of service.

Technical Details of CVE-2017-15703

Apache NiFi 1.0.0 - 1.3.0 vulnerability details:

Vulnerability Description

Authenticated users without ACL permissions can upload harmful templates
Denial of service risk due to Java deserialization attack

Affected Systems and Versions

Product: Apache NiFi
Vendor: Apache Software Foundation
Versions: 1.0.0 - 1.3.0

Exploitation Mechanism

Upload of a template containing harmful code by authenticated users without ACL permissions
Denial of service achieved through a Java deserialization attack

Mitigation and Prevention

Steps to address and prevent CVE-2017-15703:

Immediate Steps to Take

Upgrade to Apache NiFi 1.4.0 or later to mitigate the vulnerability
Ensure proper ACL permissions for authenticated users

Long-Term Security Practices

Regularly review and update access control lists
Conduct security training for users on safe template uploads

Patching and Updates

Apply patches and updates provided by Apache Software Foundation