CVE-2021-31780 : What You Need to Know
Learn about CVE-2021-31780, a vulnerability in MISP 2.4.141 that allows unauthorized data disclosure during event edits. Find out the impact, affected systems, exploitation method, and mitigation steps.
A vulnerability in MISP 2.4.141 could lead to information disclosure due to an incorrect sharing group association on event edits.
Understanding CVE-2021-31780
This CVE identifies a flaw in MISP version 2.4.141 that could result in the exposure of sensitive information during event edits.
What is CVE-2021-31780?
The vulnerability arises from an inaccurate sharing group association in MISP's MispObject.php file, potentially allowing unauthorized disclosure of data during event edits.
The Impact of CVE-2021-31780
Exploiting this vulnerability could lead to the unintended exposure of confidential information to unauthorized entities, compromising data integrity and confidentiality.
Technical Details of CVE-2021-31780
This section delves into the specific technical aspects of the vulnerability in MISP version 2.4.141.
Vulnerability Description
The flaw in MispObject.php mishandles sharing group associations during event edits, enabling the reuse of passed local IDs instead of following the correct sharing group association protocol.
Affected Systems and Versions
MISP version 2.4.141 is specifically impacted by this vulnerability, potentially affecting instances that rely on sharing group associations for data security.
Exploitation Mechanism
By exploiting the incorrect sharing group association, threat actors could manipulate local IDs to gain unauthorized access to sensitive information during event edits.
Mitigation and Prevention
To address CVE-2021-31780, immediate action and long-term security practices are essential to safeguard MISP environments.
Immediate Steps to Take
Mitigate the vulnerability by updating MISP to a patched version that resolves the incorrect sharing group association issue. Ensure that event edits are securely managed to prevent unauthorized data disclosure.
Long-Term Security Practices
Establish robust access controls, monitor sharing group associations diligently, and educate users on data handling best practices to enhance overall security posture.
Patching and Updates
Regularly apply security patches and updates provided by the MISP project to address vulnerabilities promptly and maintain the integrity of the platform.