CVE-2018-17193 : Security Advisory and Response

Apache NiFi 1.0.0 - 1.7.1 is affected by a reflected XSS vulnerability in the error page of message-page.jsp due to improper sanitization of the X-ProxyContextPath HTTP request header.

Understanding CVE-2018-17193

This CVE entry highlights a security issue in Apache NiFi versions 1.0.0 to 1.7.1 that could be exploited for a reflected XSS attack.

What is CVE-2018-17193?

The vulnerability in Apache NiFi's error page allowed malicious actors to execute a reflected XSS attack by manipulating the X-ProxyContextPath header.

The Impact of CVE-2018-17193

The vulnerability could lead to unauthorized script execution in the context of a user's browser, potentially compromising sensitive data or performing actions on behalf of the user.

Technical Details of CVE-2018-17193

Apache NiFi 1.0.0 - 1.7.1 is susceptible to a reflected XSS attack due to the following:

Vulnerability Description

The error page of message-page.jsp did not properly sanitize the X-ProxyContextPath HTTP request header, enabling attackers to inject malicious scripts.

Affected Systems and Versions

Product: Apache NiFi
Vendor: Apache Software Foundation
Versions: Apache NiFi 1.0.0 - 1.7.1

Exploitation Mechanism

Attackers exploited the lack of input sanitization in the X-ProxyContextPath header to inject and execute malicious scripts in the context of a user's browser.

Mitigation and Prevention

To address CVE-2018-17193 and enhance security measures, users should take the following steps:

Immediate Steps to Take

Upgrade to Apache NiFi 1.8.0 or a later release that includes the fix for this vulnerability.

Long-Term Security Practices

Regularly update Apache NiFi to the latest version to ensure all security patches are applied.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by Apache Software Foundation to mitigate potential risks.