CVE-2023-50918

Comprehensive Technical Analysis of CVE-2023-50918

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-50918 Description: The vulnerability affects the app/Controller/AuditLogsController.php file in MISP (Malware Information Sharing Platform) versions prior to 2.4.182. Specifically, it mishandles Access Control Lists (ACLs) for audit logs, potentially allowing unauthorized access to sensitive audit information. CVSS Score: 9.8

Severity Evaluation:

• Critical: A CVSS score of 9.8 indicates a critical vulnerability. This high score is likely due to the potential for unauthorized access to sensitive information, which can have severe implications for data integrity and confidentiality.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthorized Access: An attacker could exploit this vulnerability to gain unauthorized access to audit logs, which may contain sensitive information about system activities and user actions.
• Privilege Escalation: If an attacker can manipulate ACLs, they might escalate their privileges within the MISP system, leading to further unauthorized actions.

Exploitation Methods:

• Direct Access: An attacker with basic access to the MISP system could attempt to access audit logs directly by exploiting the ACL misconfiguration.
• Script Injection: An attacker might inject malicious scripts to bypass ACL checks and access audit logs.

3. Affected Systems and Software Versions

Affected Software:

• MISP versions prior to 2.4.182

Systems:

• Any system running the affected versions of MISP, including but not limited to:
  • Security Operations Centers (SOCs)
  • Incident Response Teams
  • Threat Intelligence Platforms

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Software: Upgrade to MISP version 2.4.182 or later, which includes the patch for this vulnerability.
• Access Control Review: Conduct a thorough review of ACL configurations to ensure proper access controls are in place.

Long-Term Strategies:

• Regular Audits: Implement regular security audits to identify and mitigate similar vulnerabilities.
• Monitoring: Enhance monitoring and logging to detect any unauthorized access attempts.
• User Training: Educate users on the importance of adhering to security policies and reporting any suspicious activities.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Data Breach Risk: Organizations using affected MISP versions are at risk of data breaches, which can lead to loss of sensitive information and potential legal repercussions.
• Operational Disruption: Unauthorized access to audit logs can disrupt incident response and forensic investigations, affecting the overall security posture.

Long-Term Impact:

• Trust Erosion: Continued vulnerabilities in widely-used security tools can erode trust in the cybersecurity community.
• Increased Attack Surface: Vulnerabilities in security tools can increase the attack surface, making it easier for attackers to exploit systems.

6. Technical Details for Security Professionals

Vulnerability Details:

• File Affected: app/Controller/AuditLogsController.php
• Issue: Misconfiguration in ACL handling for audit logs.

Patch Information:

• Commit Reference: 92888b1376246c0f20c256aaa3c57b6f12115fa1
• Version Comparison: v2.4.181...v2.4.182

Recommendations:

• Code Review: Conduct a detailed code review of the AuditLogsController.php file to understand the ACL misconfiguration and ensure proper implementation.
• Testing: Perform thorough testing of the patched version to ensure the vulnerability is fully mitigated and no new issues are introduced.

Conclusion: CVE-2023-50918 represents a critical vulnerability in MISP that requires immediate attention. Organizations should prioritize updating to the patched version and reviewing their ACL configurations to mitigate the risk of unauthorized access to audit logs. Regular security audits and enhanced monitoring can help prevent similar vulnerabilities in the future.