CVE-2019-12868 : Security Advisory and Response

CVE-2019-12868 is a vulnerability found in MISP 2.4.109 that allows remote command execution by a super administrator due to improper handling of user-controlled entries in the app/Model/Server.php file.

Understanding CVE-2019-12868

What is CVE-2019-12868?

This CVE refers to a security flaw in MISP 2.4.109 that enables remote command execution by a super administrator through the exploitation of the PHP file_exists function with user-controlled entries.

The Impact of CVE-2019-12868

The vulnerability allows threat actors to execute commands remotely, potentially leading to unauthorized access, data theft, and system compromise.

Technical Details of CVE-2019-12868

Vulnerability Description

The issue arises from the improper use of the PHP file_exists function with user-controlled inputs in the app/Model/Server.php file, triggering deserialization via phar:// URLs.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions are affected.

Exploitation Mechanism

The vulnerability can be exploited by a super administrator to execute arbitrary commands remotely, posing a significant security risk.

Mitigation and Prevention

Immediate Steps to Take

Disable super administrator privileges if not necessary.
Implement strict input validation to prevent user-controlled entries.
Monitor and restrict the use of phar:// URLs.

Long-Term Security Practices

Regularly update MISP to the latest secure version.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply patches provided by MISP to address the vulnerability and enhance system security.