CVE-2019-20879 : Exploit Details and Defense Strategies

A vulnerability has been found in Mattermost Server versions prior to 5.8.0, 5.7.2, 5.6.5, and 4.10.7 where modifying email addresses does not necessitate re-entering credentials.

Understanding CVE-2019-20879

This CVE identifies an issue in Mattermost Server that allows changes to email addresses without requiring re-entry of credentials.

What is CVE-2019-20879?

CVE-2019-20879 is a vulnerability in Mattermost Server versions before 5.8.0, 5.7.2, 5.6.5, and 4.10.7 that enables users to modify email addresses without the need to re-enter their credentials.

The Impact of CVE-2019-20879

This vulnerability could potentially lead to unauthorized access to user accounts if email addresses are changed without re-authentication.

Technical Details of CVE-2019-20879

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows users to change email addresses without requiring re-entry of credentials, potentially exposing accounts to unauthorized access.

Affected Systems and Versions

Mattermost Server versions prior to 5.8.0, 5.7.2, 5.6.5, and 4.10.7

Exploitation Mechanism

Attackers could exploit this vulnerability by changing email addresses on affected versions, gaining unauthorized access to user accounts.

Mitigation and Prevention

Protecting systems from CVE-2019-20879 is crucial to maintaining security.

Immediate Steps to Take

Upgrade Mattermost Server to version 5.8.0 or newer to mitigate the vulnerability.
Encourage users to regularly review their account activities for any unauthorized changes.

Long-Term Security Practices

Implement multi-factor authentication to add an extra layer of security to user accounts.
Conduct regular security audits to identify and address any potential vulnerabilities.

Patching and Updates

Stay informed about security updates from Mattermost and promptly apply patches to ensure system security.