CVE-2017-18918 : Security Advisory and Response

A vulnerability has been found in Mattermost Server versions 3.7.3 and 3.6.5, allowing a System Administrator to place a SAML certificate at any specified location.

Understanding CVE-2017-18918

This CVE identifies a security issue in Mattermost Server versions 3.7.3 and 3.6.5 that enables a System Administrator to insert a SAML certificate at a designated path.

What is CVE-2017-18918?

This vulnerability in Mattermost Server versions 3.7.3 and 3.6.5 permits a System Administrator to upload a SAML certificate to a location of their choice.

The Impact of CVE-2017-18918

The vulnerability could lead to unauthorized access and potential compromise of sensitive information stored on the affected systems.

Technical Details of CVE-2017-18918

This section provides detailed technical insights into the CVE.

Vulnerability Description

The flaw in Mattermost Server versions 3.7.3 and 3.6.5 allows a System Administrator to place a SAML certificate at an arbitrary pathname.

Affected Systems and Versions

Mattermost Server versions 3.7.3 and 3.6.5

Exploitation Mechanism

The vulnerability can be exploited by a System Administrator to upload a SAML certificate to a specified location.

Mitigation and Prevention

Protect your systems from CVE-2017-18918 with the following steps:

Immediate Steps to Take

Update Mattermost Server to a patched version that addresses the vulnerability.
Monitor system logs for any suspicious activities related to SAML certificate uploads.

Long-Term Security Practices

Implement strict access controls to limit the actions of System Administrators.
Regularly audit and review the permissions granted to System Administrators.

Patching and Updates

Stay informed about security updates and patches released by Mattermost.
Apply patches promptly to ensure your systems are protected from known vulnerabilities.