CVE-2019-20881 Explained : Impact and Mitigation

Mattermost Server prior to version 5.8.0 has a vulnerability related to Multi-Factor Authentication (MFA) brute-force attacks.

Understanding CVE-2019-20881

This CVE identifies a security issue in Mattermost Server versions before 5.8.0 that could be exploited through brute-force attacks on Multi-Factor Authentication (MFA).

What is CVE-2019-20881?

An issue in Mattermost Server before version 5.8.0 where it mishandles brute-force attacks against MFA.

The Impact of CVE-2019-20881

The vulnerability could allow malicious actors to potentially bypass MFA protections, compromising the security of the system and sensitive data.

Technical Details of CVE-2019-20881

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

Vulnerability Description

Mattermost Server prior to version 5.8.0 does not properly handle brute-force attacks against Multi-Factor Authentication (MFA).

Affected Systems and Versions

Product: Mattermost Server
Vendor: N/A
Versions affected: All versions before 5.8.0

Exploitation Mechanism

Attackers could exploit this vulnerability by launching brute-force attacks against the MFA system, potentially gaining unauthorized access.

Mitigation and Prevention

Protecting systems from CVE-2019-20881 requires immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade Mattermost Server to version 5.8.0 or later to mitigate the vulnerability.
Monitor for any unusual login attempts or patterns that could indicate a brute-force attack.

Long-Term Security Practices

Implement strong password policies and encourage the use of complex, unique passwords.
Enable additional security measures beyond MFA, such as IP restrictions or account lockouts after multiple failed login attempts.

Patching and Updates

Regularly update and patch Mattermost Server to ensure that known vulnerabilities are addressed and security measures are up to date.