CVE-2020-24621 Explained : Impact and Mitigation

A remote code execution (RCE) vulnerability was discovered in the htmlformentry module before version 3.11.0 for OpenMRS, allowing malicious files to be written and executed.

Understanding CVE-2020-24621

This CVE involves a remote code execution vulnerability in the htmlformentry module for OpenMRS.

What is CVE-2020-24621?

The vulnerability allows attackers to execute malicious code by exploiting path traversal to write and execute Velocity Template Language files.

The Impact of CVE-2020-24621

The vulnerability could lead to unauthorized remote code execution on systems running the affected htmlformentry module.

Technical Details of CVE-2020-24621

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability in the htmlformentry module allows attackers to write and execute malicious Velocity Template Language files.

Affected Systems and Versions

Product: htmlformentry (HTML Form Entry) module
Vendor: OpenMRS
Versions affected: Before 3.11.0

Exploitation Mechanism

By leveraging path traversal, attackers can write malicious files to directories, enabling them to execute arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2020-24621 requires immediate action and long-term security practices.

Immediate Steps to Take

Update the htmlformentry module to version 3.11.0 or newer to mitigate the vulnerability.
Monitor system logs for any suspicious activities.

Long-Term Security Practices

Implement proper input validation to prevent path traversal attacks.
Regularly audit and review file write permissions on directories.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security.