CVE-2021-42015 : What You Need to Know

A vulnerability has been identified in Mendix Applications using Mendix 7, 8, and 9 versions, allowing a local attacker to access sensitive information through browser cache.

Understanding CVE-2021-42015

This CVE affects Mendix Applications using different versions leading to potential information disclosure.

What is CVE-2021-42015?

The vulnerability in affected Mendix Applications allows local attackers to read cached documents opened or downloaded via a browser, potentially exposing sensitive information.

The Impact of CVE-2021-42015

Local attackers could exploit this vulnerability to access sensitive data stored in the browser cache, compromising data confidentiality.

Technical Details of CVE-2021-42015

A detailed overview of the technical aspects of the CVE.

Vulnerability Description

Applications built with vulnerable Mendix versions do not prevent file documents from being cached, enabling unauthorized access through browser cache exploration.

Affected Systems and Versions

Mendix Applications using Mendix 7: All versions < V7.23.26
Mendix Applications using Mendix 8: All versions < V8.18.12
Mendix Applications using Mendix 9: All versions < V9.6.1

Exploitation Mechanism

The vulnerability allows local attackers to retrieve sensitive information by exploiting the browser cache where files were accessed.

Mitigation and Prevention

Mitigation steps and best practices to prevent exploitation.

Immediate Steps to Take

Update Mendix Applications to versions V7.23.26, V8.18.12, or V9.6.1, respectively.
Clear browser cache regularly to reduce the risk of data exposure.
Utilize encryption for sensitive documents to enhance security.

Long-Term Security Practices

Implement access controls to restrict document access based on user roles.
Conduct regular security assessments to identify and address vulnerabilities.

Patching and Updates

Siemens recommends applying patches provided by Mendix for the affected versions to address the vulnerability.