CVE-2019-3964 : Exploit Details and Defense Strategies

OpenEMR versions 5.0.1 and earlier are affected by a reflected XSS vulnerability in the doc_id parameter of controller.php, potentially allowing attackers to execute arbitrary code within a user's session.

Understanding CVE-2019-3964

This CVE identifies a Cross Site Scripting (XSS) vulnerability in OpenEMR.

What is CVE-2019-3964?

CVE-2019-3964 is a security vulnerability in OpenEMR versions 5.0.1 and earlier that enables attackers to execute malicious code within a user's session.

The Impact of CVE-2019-3964

The vulnerability could lead to unauthorized code execution within the context of a user's session, posing a significant security risk.

Technical Details of CVE-2019-3964

OpenEMR 5.0.1 and earlier versions are susceptible to a reflected XSS vulnerability in the doc_id parameter of controller.php.

Vulnerability Description

The doc_id parameter in controller.php allows for the injection of malicious code, enabling attackers to execute arbitrary commands.

Affected Systems and Versions

Product: OpenEMR
Versions Affected: 5.0.1 and earlier

Exploitation Mechanism

Attackers can exploit the vulnerability by injecting malicious code into the doc_id parameter, potentially compromising user sessions.

Mitigation and Prevention

It is crucial to take immediate action to mitigate the risks associated with CVE-2019-3964.

Immediate Steps to Take

Update OpenEMR to a patched version that addresses the XSS vulnerability.
Implement input validation mechanisms to prevent malicious code injection.

Long-Term Security Practices

Regularly monitor and update security patches for OpenEMR.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates provided by OpenEMR to prevent exploitation of known vulnerabilities.