CVE-2019-11408 : Security Advisory and Response

CVE-2019-11408 was published on June 17, 2019, and involves a Cross-Site Scripting (XSS) vulnerability in the Operator Panel module of FusionPBX 4.4.3. This vulnerability can be exploited by remote unauthenticated attackers to inject arbitrary JavaScript characters, potentially leading to remote code execution.

Understanding CVE-2019-11408

This CVE entry highlights a security issue in FusionPBX 4.4.3 that allows attackers to execute malicious code remotely.

What is CVE-2019-11408?

The vulnerability in the Operator Panel module of FusionPBX 4.4.3 enables attackers to perform XSS attacks by manipulating caller ID numbers during phone calls. This manipulation can facilitate the injection of arbitrary JavaScript code, which, when combined with a command injection vulnerability in FusionPBX, can result in remote code execution.

The Impact of CVE-2019-11408

The exploitation of this vulnerability can lead to severe consequences, including unauthorized remote code execution on affected systems.

Technical Details of CVE-2019-11408

This section delves into the technical aspects of the CVE, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The XSS vulnerability in FusionPBX 4.4.3's Operator Panel module allows remote unauthenticated attackers to inject arbitrary JavaScript characters by manipulating caller ID numbers during phone calls. This manipulation, when combined with a command injection flaw in FusionPBX, can result in remote code execution.

Affected Systems and Versions

Affected Version: FusionPBX 4.4.3
Systems: Any system running FusionPBX 4.4.3 is vulnerable to this exploit.

Exploitation Mechanism

Attackers can exploit this vulnerability by making phone calls with specially crafted caller ID numbers, enabling the injection of malicious JavaScript code and potentially leading to remote code execution.

Mitigation and Prevention

To address CVE-2019-11408 and enhance system security, consider the following mitigation strategies:

Immediate Steps to Take

Update FusionPBX to the latest version to patch the vulnerability.
Implement input validation mechanisms to prevent XSS attacks.
Monitor and restrict access to the Operator Panel module.

Long-Term Security Practices

Conduct regular security audits and penetration testing to identify vulnerabilities.
Educate users on safe practices to prevent social engineering attacks.
Stay informed about security updates and best practices in web application security.

Patching and Updates

Regularly check for security updates and patches released by FusionPBX to address known vulnerabilities and enhance system security.