CVE-2020-8892 in MISP
Summary
by MITRE
An issue was discovered in MISP before 2.4.121. It did not consider the HTTP PUT method when trying to block a brute-force series of invalid requests.
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Analysis
by VulDB Data Team • 06/23/2026
The vulnerability identified as CVE-2020-8892 represents a significant security weakness in the Malware Information Sharing Platform MISP prior to version 2.4.121. This issue stems from the platform's inadequate handling of brute-force attack prevention mechanisms, specifically failing to properly block repeated invalid requests that utilize the HTTP PUT method. The flaw creates a potential vector for attackers to systematically attempt unauthorized access or exploit the system through repeated malformed requests without proper rate limiting or request blocking measures.
This vulnerability falls under the category of insufficient brute-force protection mechanisms, which aligns with CWE-307 and represents a failure in implementing proper access control and rate limiting controls. The absence of HTTP PUT method consideration in the brute-force protection system creates a gap where attackers can leverage this method to bypass existing security measures that might only monitor GET or POST requests. The MISP platform, designed for collaborative threat intelligence sharing, becomes vulnerable to automated attack patterns that could compromise its integrity and availability.
The operational impact of this vulnerability extends beyond simple access control failures, potentially allowing attackers to consume system resources through repeated invalid requests, leading to denial of service conditions or enabling more sophisticated attacks that rely on brute-force techniques. Attackers could exploit this weakness to test multiple credential combinations or manipulate system parameters through PUT requests without triggering the intended protection mechanisms. This creates a scenario where legitimate users might experience service degradation while attackers can systematically probe the system's defenses.
Organizations using MISP versions prior to 2.4.121 face increased risk of unauthorized access attempts and potential system compromise through brute-force attacks that leverage the HTTP PUT method. The vulnerability demonstrates poor implementation of security controls as outlined in the ATT&CK framework's credential access and resource exhaustion tactics. Security teams should implement immediate mitigation strategies including upgrading to the patched version 2.4.121 or later, configuring proper HTTP method filtering, and implementing comprehensive rate limiting across all HTTP methods to prevent similar vulnerabilities from being exploited in other components of the security infrastructure.