CVE-2017-18895 : What You Need to Know

A vulnerability has been found in versions 4.2.0, 4.1.1, and 4.0.5 of Mattermost Server, allowing attackers to access confidential information through the REST API version 4 endpoint.

Understanding CVE-2017-18895

This CVE identifies a security issue in Mattermost Server versions prior to 4.2.0, 4.1.1, and 4.0.5 that could lead to unauthorized access to user statuses.

What is CVE-2017-18895?

This vulnerability enables attackers to retrieve sensitive information, specifically user statuses, by exploiting the REST API version 4 endpoint in affected versions of Mattermost Server.

The Impact of CVE-2017-18895

The exploitation of this vulnerability could result in unauthorized access to confidential user data, potentially compromising user privacy and security.

Technical Details of CVE-2017-18895

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The issue in Mattermost Server versions before 4.2.0, 4.1.1, and 4.0.5 allows attackers to obtain user statuses through the REST API version 4 endpoint.

Affected Systems and Versions

Mattermost Server versions 4.2.0, 4.1.1, and 4.0.5

Exploitation Mechanism

Attackers can exploit the vulnerability by making unauthorized requests to the REST API version 4 endpoint, gaining access to user statuses.

Mitigation and Prevention

Protecting systems from CVE-2017-18895 is crucial to maintaining security.

Immediate Steps to Take

Upgrade Mattermost Server to version 4.2.0 or newer to mitigate the vulnerability.
Monitor and restrict access to the REST API to prevent unauthorized requests.

Long-Term Security Practices

Regularly update and patch software to address security vulnerabilities promptly.
Implement access controls and authentication mechanisms to secure sensitive data.

Patching and Updates

Stay informed about security updates and patches released by Mattermost to address vulnerabilities like CVE-2017-18895.