CVE-2017-18875 : What You Need to Know

Mattermost Server versions prior to 4.3.0, 4.2.1, and 4.1.2 are affected by a vulnerability when using local storage for file storage, allowing a System Admin to create any type of files.

Understanding CVE-2017-18875

This CVE identifies a security issue in Mattermost Server versions.

What is CVE-2017-18875?

This CVE pertains to a vulnerability in Mattermost Server that enables a System Admin to generate arbitrary files when utilizing local storage for file storage.

The Impact of CVE-2017-18875

The vulnerability could lead to unauthorized file creation and potential security breaches within affected systems.

Technical Details of CVE-2017-18875

This section provides technical insights into the CVE.

Vulnerability Description

The issue arises in Mattermost Server versions prior to 4.3.0, 4.2.1, and 4.1.2 when local storage is used for file storage, allowing System Admins to create any files.

Affected Systems and Versions

Mattermost Server versions before 4.3.0, 4.2.1, and 4.1.2

Exploitation Mechanism

The vulnerability can be exploited by System Admins utilizing local storage for file storage to create unauthorized files.

Mitigation and Prevention

Protective measures to address the CVE.

Immediate Steps to Take

Upgrade Mattermost Server to versions 4.3.0, 4.2.1, or 4.1.2 to mitigate the vulnerability.
Avoid using local storage for file storage if possible.

Long-Term Security Practices

Regularly monitor and update server software to prevent vulnerabilities.
Implement access controls to restrict System Admin privileges.

Patching and Updates

Apply patches and updates provided by Mattermost to address the vulnerability.