EUVD-2023-60216

Comprehensive Technical Analysis of EUVD-2023-60216

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2023-60216 affects UliCMS 2023.1 and involves an authentication bypass through mass assignment in the UserController. This allows unauthenticated attackers to create admin users by sending a crafted POST request to the admin index.php endpoint. The CVSS (Common Vulnerability Scoring System) base score of 9.3 indicates a critical severity level. The vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N breaks down as follows:

• AV:N (Network): The vulnerability is exploitable over the network.
• AC:L (Low): The attack complexity is low.
• AT:N (None): No special conditions are required for the attack.
• PR:N (None): No privileges are required.
• UI:N (None): No user interaction is required.
• VC:H (High): Confidentiality impact is high.
• VI:H (High): Integrity impact is high.
• VA:H (High): Availability impact is high.
• SC:N (None): Scope change is none.
• SI:N (None): Scope impact is none.
• SA:N (None): Scope availability impact is none.

This vulnerability is critical due to its high impact on confidentiality, integrity, and availability, combined with the ease of exploitation.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through a crafted POST request to the admin index.php endpoint. Attackers can exploit this vulnerability by:

• Mass Assignment: Sending a POST request with specific parameters that bypass authentication checks and create an admin user.
• Automated Scripts: Using automated scripts to send multiple POST requests to exploit the vulnerability en masse.
• Phishing: Tricking legitimate users into visiting a malicious site that sends the crafted POST request.

3. Affected Systems and Software Versions

The vulnerability specifically affects UliCMS version 2023.1. Other versions of UliCMS may also be affected if they share the same codebase or have not been patched for this issue.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following steps should be taken:

• Patch Management: Immediately apply the latest security patches provided by UliCMS.
• Access Controls: Implement strict access controls and monitoring on the admin index.php endpoint.
• Input Validation: Ensure proper input validation and sanitization to prevent mass assignment vulnerabilities.
• Network Segmentation: Segregate administrative interfaces from public-facing networks.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious POST requests.
• User Education: Educate users about phishing attacks and the importance of not clicking on suspicious links.

5. Impact on European Cybersecurity Landscape

The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of content management systems (CMS) like UliCMS. Organizations relying on UliCMS for their web presence are at risk of unauthorized administrative access, leading to data breaches, system compromises, and potential financial losses. The critical nature of the vulnerability underscores the need for robust cybersecurity measures and continuous monitoring.

6. Technical Details for Security Professionals

Exploit Details:

• Endpoint: admin index.php
• Method: POST
• Parameters: Specific parameters that allow mass assignment to create an admin user.

Detection:

• Log Analysis: Monitor logs for unusual POST requests to the admin index.php endpoint.
• Anomaly Detection: Use anomaly detection tools to identify patterns indicative of mass assignment attacks.

Response:

• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.
• Forensic Analysis: Conduct forensic analysis to understand the scope and impact of any successful exploitation.

References:

• Exploit Database: Exploit-DB Entry
• Vulnerability Details: VulnCheck Advisory
• NVD Entry: NVD CVE-2023-53914

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of unauthorized access and potential data breaches.