CVE-2017-12623 : Security Advisory and Response

CVE-2017-12623, published on October 2, 2017, addresses a vulnerability in Apache NiFi versions 1.0.0 to 1.3.0 that allowed an authorized user to exploit an XML External Entity (XXE) attack to access sensitive files.

Understanding CVE-2017-12623

This CVE entry pertains to an information disclosure vulnerability in Apache NiFi.

What is CVE-2017-12623?

An authorized user could upload a template containing malicious code, exploiting an XML External Entity (XXE) attack to access sensitive files.

The Impact of CVE-2017-12623

The vulnerability could lead to unauthorized access to sensitive data and potential information disclosure.

Technical Details of CVE-2017-12623

This section provides technical insights into the vulnerability.

Vulnerability Description

The issue allowed users to upload templates with harmful code, enabling access to sensitive files through an XXE attack.

Affected Systems and Versions

Product: Apache NiFi
Vendor: Apache Software Foundation
Versions Affected: 1.0.0 to 1.3.0

Exploitation Mechanism

The vulnerability exploited an XML External Entity (XXE) attack to gain unauthorized access to sensitive files.

Mitigation and Prevention

Protective measures and actions to mitigate the CVE-2017-12623 vulnerability.

Immediate Steps to Take

Upgrade to Apache NiFi version 1.4.0 or later, where the issue is resolved.

Long-Term Security Practices

Regularly update Apache NiFi to the latest secure versions.
Implement secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Ensure timely application of security patches and updates to mitigate known vulnerabilities.