CVE-2019-16978 : Security Advisory and Response

FusionPBX versions prior to v4.5.7 have a vulnerability in the file app\devices\device_settings.php, leading to a cross-site scripting (XSS) issue.

Understanding CVE-2019-16978

This CVE identifies a specific vulnerability in FusionPBX versions up to v4.5.7 that allows for a cross-site scripting attack.

What is CVE-2019-16978?

This CVE pertains to an XSS vulnerability in FusionPBX versions prior to v4.5.7 due to unsanitized input from the URL being reflected in HTML, enabling malicious script execution.

The Impact of CVE-2019-16978

The vulnerability can be exploited by attackers to execute arbitrary scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2019-16978

This section delves into the technical aspects of the CVE.

Vulnerability Description

The issue arises from the unsanitized "id" variable from the URL being reflected in HTML, allowing for XSS attacks.

Affected Systems and Versions

FusionPBX versions prior to v4.5.7

Exploitation Mechanism

Attackers can craft malicious URLs containing scripts that, when executed, can compromise user data or perform unauthorized actions.

Mitigation and Prevention

Protecting systems from CVE-2019-16978 requires immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade FusionPBX to version 4.5.7 or later to mitigate the vulnerability.
Implement input validation to sanitize user inputs and prevent XSS attacks.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Educate users on safe browsing practices to minimize the risk of XSS attacks.
Employ web application firewalls to filter and block malicious traffic.
Conduct security audits and penetration testing to identify and remediate vulnerabilities.

Patching and Updates

Stay informed about security advisories and apply patches promptly to secure systems against potential exploits.