CVE-2017-18905 : What You Need to Know
Learn about CVE-2017-18905 affecting Mattermost Server versions before 4.0.0, 3.10.2, and 3.9.2. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
Mattermost Server versions before 4.0.0, 3.10.2, and 3.9.2 have a flaw in handling Session invalidation when used as an OAuth 2.0 service provider. This vulnerability has been identified as CVE-2017-18905 and requires attention.
Understanding CVE-2017-18905
What is CVE-2017-18905?
CVE-2017-18905 is a vulnerability found in Mattermost Server versions prior to 4.0.0, 3.10.2, and 3.9.2, specifically related to mishandling Session invalidation when functioning as an OAuth 2.0 service provider.
The Impact of CVE-2017-18905
This vulnerability could potentially allow unauthorized access or other security breaches when exploiting the mishandling of Session invalidation.
Technical Details of CVE-2017-18905
Vulnerability Description
An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2, where Session invalidation was mishandled, posing a security risk.
Affected Systems and Versions
- Mattermost Server versions before 4.0.0
- Mattermost Server versions before 3.10.2
- Mattermost Server versions before 3.9.2
Exploitation Mechanism
The vulnerability arises when Mattermost Server is used as an OAuth 2.0 service provider, leading to improper Session invalidation.
Mitigation and Prevention
Immediate Steps to Take
- Upgrade Mattermost Server to version 4.0.0 or newer to mitigate the vulnerability.
- Implement proper session management practices to enhance security.
Long-Term Security Practices
- Regularly monitor and update security configurations.
- Conduct security audits to identify and address potential vulnerabilities.
Patching and Updates
- Stay informed about security updates from Mattermost and promptly apply patches to ensure system security.