CVE-2020-23829 : Exploit Details and Defense Strategies

LibreHealth EHR 2.0.0 is vulnerable to an authenticated file upload flaw that can lead to remote code execution.

Understanding CVE-2020-23829

This CVE identifies a critical vulnerability in LibreHealth EHR 2.0.0 that allows attackers to execute remote code by exploiting an authenticated file upload vulnerability.

What is CVE-2020-23829?

The vulnerability in interface/new/new_comprehensive_save.php in LibreHealth EHR 2.0.0 enables remote attackers to achieve remote code execution on the hosting webserver by uploading a specially crafted image.

The Impact of CVE-2020-23829

The exploitation of this vulnerability can result in severe consequences, including unauthorized access, data theft, and potential compromise of the entire system.

Technical Details of CVE-2020-23829

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw in LibreHealth EHR 2.0.0 allows authenticated users to upload malicious images, leading to remote code execution on the webserver.

Affected Systems and Versions

System: LibreHealth EHR 2.0.0
Versions: All versions are affected.

Exploitation Mechanism

Attackers exploit the authenticated file upload vulnerability in interface/new/new_comprehensive_save.php to upload a malicious image, triggering remote code execution.

Mitigation and Prevention

Protecting systems from CVE-2020-23829 is crucial to maintaining security.

Immediate Steps to Take

Disable file uploads in the affected component.
Implement strict input validation to prevent malicious file uploads.
Monitor file upload activities for any suspicious behavior.

Long-Term Security Practices

Regularly update LibreHealth EHR to the latest secure version.
Conduct security audits to identify and address vulnerabilities proactively.
Train users on secure coding practices and awareness of file upload risks.

Patching and Updates

Apply patches or security updates provided by LibreHealth promptly.
Stay informed about security advisories and best practices to enhance system security.