CVE-2019-18667 : Vulnerability Insights and Analysis

A vulnerability has been found in the freeradius3 package before version 0.15.7_3 for pfSense on FreeBSD, allowing an attacker to execute arbitrary JavaScript code on a victim's browser.

Understanding CVE-2019-18667

This CVE identifies a security flaw in the freeradius3 package used in pfSense on FreeBSD, enabling the execution of malicious JavaScript code through a specific file.

What is CVE-2019-18667?

The vulnerability in /usr/local/www/freeradius_view_config.php in freeradius3 before version 0.15.7_3 for pfSense on FreeBSD permits an attacker to run arbitrary JavaScript code on a target's browser by leveraging an XSS payload as the username or password.

The Impact of CVE-2019-18667

The exploitation of this vulnerability could lead to unauthorized execution of JavaScript code on a victim's browser, potentially compromising sensitive information or performing malicious actions.

Technical Details of CVE-2019-18667

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw in /usr/local/www/freeradius_view_config.php in freeradius3 before version 0.15.7_3 for pfSense on FreeBSD allows an attacker to inject and execute arbitrary JavaScript code by utilizing an XSS payload as the username or password.

Affected Systems and Versions

Package: freeradius3
Versions affected: Before 0.15.7_3
Operating System: pfSense on FreeBSD

Exploitation Mechanism

The vulnerability can be exploited by an attacker by inserting a crafted XSS payload as the username or password, triggering the execution of malicious JavaScript code on the victim's browser.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Update freeradius3 package to version 0.15.7_3 or later.
Monitor for any suspicious activities on /usr/local/www/freeradius_view_config.php.

Long-Term Security Practices

Implement input validation mechanisms to prevent XSS attacks.
Regularly audit and review code for security vulnerabilities.

Patching and Updates

Ensure timely patching of software and systems to address known vulnerabilities and enhance overall security.