CVE-2018-21265 : What You Need to Know

A vulnerability has been identified in the Mattermost Desktop App versions prior to 4.0.0. It incorrectly dealt with the Same Origin Policy when utilizing the setPermissionRequestHandler function for features like video, audio, and notifications.

Understanding CVE-2018-21265

An issue was discovered in Mattermost Desktop App before 4.0.0. It mishandled the Same Origin Policy for setPermissionRequestHandler (e.g., video, audio, and notifications).

What is CVE-2018-21265?

CVE-2018-21265 is a vulnerability in the Mattermost Desktop App that affects versions prior to 4.0.0. It involves mishandling the Same Origin Policy when using the setPermissionRequestHandler function for various features.

The Impact of CVE-2018-21265

This vulnerability could allow an attacker to bypass security restrictions and potentially execute malicious actions through video, audio, and notification features in the app.

Technical Details of CVE-2018-21265

Vulnerability Description

The vulnerability arises from the incorrect handling of the Same Origin Policy within the setPermissionRequestHandler function.

Affected Systems and Versions

Mattermost Desktop App versions prior to 4.0.0

Exploitation Mechanism

Exploitation involves manipulating the setPermissionRequestHandler function to bypass security measures and potentially perform unauthorized actions.

Mitigation and Prevention

Immediate Steps to Take

Users should update their Mattermost Desktop App to version 4.0.0 or newer to mitigate the vulnerability.
Avoid clicking on suspicious links or downloading files from untrusted sources.

Long-Term Security Practices

Regularly update software and applications to the latest versions to patch known vulnerabilities.
Implement security best practices such as using strong passwords and enabling two-factor authentication.

Patching and Updates

Stay informed about security updates and patches released by Mattermost and promptly apply them to ensure protection against known vulnerabilities.