EUVD-2024-52950

Comprehensive Technical Analysis of EUVD-2024-52950

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-52950 pertains to an "Unrestricted Upload of File with Dangerous Type" in the VibeThemes WPLMS plugin. This vulnerability allows an attacker to upload a web shell to a web server, which can lead to complete control over the affected system. The CVSS (Common Vulnerability Scoring System) base score of 9.9 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

• AV:N (Attack Vector: Network): The vulnerability is exploitable over the network.
• AC:L (Attack Complexity: Low): The attack requires minimal skill or resources.
• PR:L (Privileges Required: Low): The attacker needs low-level privileges, such as a student account.
• UI:N (User Interaction: None): No user interaction is required for the attack to succeed.
• S:C (Scope: Changed): The vulnerability affects a different security scope.
• C:H (Confidentiality: High): The vulnerability results in a high impact on confidentiality.
• I:H (Integrity: High): The vulnerability results in a high impact on integrity.
• A:H (Availability: High): The vulnerability results in a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves exploiting the unrestricted file upload functionality in the WPLMS plugin. An attacker could:

1. Upload a Web Shell: By uploading a malicious file (e.g., a PHP web shell), the attacker can gain remote code execution capabilities.
2. Exploit Low-Level Privileges: The attacker may only need low-level privileges, such as those of a student user, to exploit the vulnerability.
3. Network-Based Attack: Since the attack vector is network-based, the attacker can exploit the vulnerability remotely.

3. Affected Systems and Software Versions

The vulnerability affects the WPLMS plugin by VibeThemes. Specifically, it impacts versions prior to 1.9.9.5.2. Any WordPress site using this plugin within the affected version range is at risk.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following steps are recommended:

1. Update the Plugin: Immediately update the WPLMS plugin to version 1.9.9.5.2 or later.
2. Implement File Upload Restrictions: Ensure that file uploads are restricted to safe file types and sizes.
3. Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
4. Use Web Application Firewalls (WAF): Deploy WAFs to monitor and block suspicious file uploads.
5. Limit User Privileges: Ensure that user roles and privileges are tightly controlled, minimizing the potential for low-level users to exploit vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for educational institutions and organizations using the WPLMS plugin. The potential for remote code execution and data breaches could lead to:

• Data Theft: Sensitive student and institutional data could be compromised.
• Service Disruption: Attackers could disrupt educational services, leading to operational downtime.
• Reputation Damage: Institutions could face reputational damage due to security breaches.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Detection: Monitor for unusual file uploads and web shell activity. Use intrusion detection systems (IDS) and intrusion prevention systems (IPS) to detect and block suspicious activities.
• Incident Response: Develop an incident response plan that includes steps for identifying, containing, and remediating the vulnerability.
• Patch Management: Ensure that a robust patch management process is in place to quickly apply updates and patches for all plugins and software.
• Logging and Monitoring: Implement comprehensive logging and monitoring to detect and respond to any attempts to exploit the vulnerability.

Conclusion

The vulnerability described in EUVD-2024-52950 is critical and requires immediate attention. Organizations using the WPLMS plugin should prioritize updating to the latest version and implementing additional security measures to mitigate the risk. Regular security audits and proactive monitoring are essential to maintain a robust cybersecurity posture.

References

• Patchstack Vulnerability Report
• CVE ID: CVE-2024-56052
• Assigner: Patchstack
• ENISA ID Product: 50d2b3cb-c21e-358b-bbe6-ca51892d5136
• ENISA ID Vendor: 31dbb26d-f233-3a63-927d-9027f2e9c576