CVE-2020-29006 in MISP
Summary
by MITRE • 11/25/2020
MISP before 2.4.135 lacks an ACL check, related to app/Controller/GalaxyElementsController.php and app/Model/GalaxyElement.php.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 12/10/2020
The vulnerability identified as CVE-2020-29006 represents a critical access control flaw in the MISP (Malware Information Sharing Platform) community edition software. This issue affects versions prior to 2.4.135 and stems from insufficient access control list validation within the GalaxyElementsController and GalaxyElement model components. The flaw allows unauthorized users to potentially access or modify galaxy elements that should be restricted based on their role or permissions within the platform. This represents a direct violation of the principle of least privilege that is fundamental to secure software design and is classified under CWE-284 Access Control Bypass.
The technical implementation of this vulnerability occurs within the application's controller and model layers where proper authorization checks are missing or inadequately implemented. The GalaxyElementsController.php file and GalaxyElement.php model fail to enforce appropriate access controls when processing requests related to galaxy elements, which are critical components used for organizing and categorizing threat intelligence data within MISP. Attackers could exploit this weakness to gain unauthorized access to sensitive threat intelligence information or manipulate galaxy element configurations that control how threat data is classified and shared among users. This vulnerability directly impacts the integrity and confidentiality of the threat intelligence sharing platform, potentially allowing malicious actors to disrupt the platform's operation or access data that should remain restricted to authorized personnel.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it fundamentally undermines the trust model of the MISP platform. When users can bypass access controls for galaxy elements, they can potentially modify threat classification systems, alter the relationships between different threat indicators, or even inject malicious data into the platform's knowledge base. This could lead to significant operational disruptions including false positive alerts, corrupted threat intelligence data, and compromised decision-making processes for security analysts who rely on accurate threat intelligence. The vulnerability affects the platform's ability to maintain data integrity and can be exploited to perform privilege escalation attacks that may ultimately compromise the entire threat intelligence sharing ecosystem. According to ATT&CK framework, this vulnerability maps to T1078 Valid Accounts and T1566 Impersonation, as it allows attackers to leverage existing accounts to access restricted functionality.
Organizations using MISP versions prior to 2.4.135 should immediately implement mitigation strategies including updating to the patched version 2.4.135 or later, which includes proper access control validation. Additionally, administrators should review existing access control configurations and ensure that proper role-based access controls are enforced throughout the platform. Network segmentation and monitoring of access patterns can help detect potential exploitation attempts. The vulnerability demonstrates the critical importance of implementing comprehensive access control mechanisms in security platforms where threat intelligence data is shared among multiple organizations and users with varying levels of authorization. This issue serves as a reminder that even well-established security platforms can contain critical flaws that require regular security assessments and timely patch management to maintain the integrity of threat intelligence sharing environments.