CVE-2020-8891 Explained : Impact and Mitigation

An issue was discovered in MISP before 2.4.121. It did not canonicalize usernames when trying to block a brute-force series of invalid requests.

Understanding CVE-2020-8891

This CVE relates to a vulnerability found in MISP before version 2.4.121.

What is CVE-2020-8891?

The vulnerability in MISP before version 2.4.121 allowed for the bypassing of username canonicalization when attempting to block a series of invalid requests, potentially leading to security breaches.

The Impact of CVE-2020-8891

The vulnerability could be exploited by malicious actors to conduct brute-force attacks on user accounts, compromising the security and integrity of the MISP platform.

Technical Details of CVE-2020-8891

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

Vulnerability Description

The issue in MISP before 2.4.121 allowed for the non-canonicalization of usernames, creating a loophole for unauthorized access attempts.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The vulnerability could be exploited by threat actors to launch brute-force attacks on MISP user accounts, potentially gaining unauthorized access.

Mitigation and Prevention

Protective measures and actions to address the CVE.

Immediate Steps to Take

Upgrade MISP to version 2.4.121 or newer to mitigate the vulnerability.
Monitor user accounts for any suspicious activities or unauthorized access attempts.

Long-Term Security Practices

Implement strong password policies and encourage the use of multi-factor authentication.
Regularly audit and review access controls and user permissions within MISP.

Patching and Updates

Stay informed about security updates and patches released by MISP.
Promptly apply patches and updates to ensure the platform's security.