EUVD-2025-11492

Comprehensive Technical Analysis of EUVD-2025-11492

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified as EUVD-2025-11492 affects Wallos versions 2.38.2 and earlier. It involves a file upload vulnerability in the restore backup function, which allows authenticated users to upload a ZIP file containing malicious content. The ZIP file's contents are extracted on the server, potentially enabling the upload of malicious files such as web shells. This can lead to arbitrary command execution, effectively granting the attacker control over the server.

Severity Evaluation:

• CVSS Base Score: 9.8
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high base score of 9.8 indicates a critical vulnerability. The CVSS vector breakdown shows that the vulnerability can be exploited remotely (AV:N), requires low complexity (AC:L), does not need user interaction (UI:N), and has a high impact on confidentiality, integrity, and availability (C:H/I:H/A:H).

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Authenticated User Access: An attacker with valid credentials can exploit this vulnerability.
2. Malicious ZIP File Upload: The attacker uploads a specially crafted ZIP file containing malicious files, such as a web shell.
3. Command Execution: Once the malicious files are extracted, the attacker can execute arbitrary commands on the server.

Exploitation Methods:

1. Web Shell Upload: The attacker uploads a ZIP file containing a web shell, which allows them to execute commands on the server.
2. Payload Execution: The web shell can be used to execute various payloads, including data exfiltration, lateral movement, or further exploitation of the server.

3. Affected Systems and Software Versions

Affected Systems:

• Wallos versions 2.38.2 and earlier.

Software Versions:

• All versions up to and including 2.38.2 are vulnerable.

4. Recommended Mitigation Strategies

Immediate Actions:

1. Patching: Upgrade to a version of Wallos that addresses this vulnerability.
2. Access Control: Restrict access to the restore backup function to trusted administrators only.
3. File Validation: Implement strict validation and sanitization of uploaded files.
4. Monitoring: Enhance monitoring for suspicious file uploads and command executions.

Long-Term Strategies:

1. Regular Updates: Ensure that all software is regularly updated and patched.
2. Security Training: Educate users and administrators about the risks of file upload vulnerabilities.
3. Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for unusual activity.
4. Least Privilege: Enforce the principle of least privilege for user accounts.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using Wallos within the European Union. Given the critical nature of the vulnerability, successful exploitation could lead to data breaches, unauthorized access, and potential disruption of services. This underscores the importance of timely patching and robust security practices to mitigate such risks.

6. Technical Details for Security Professionals

Technical Overview:

• Vulnerability Type: File Upload Vulnerability leading to Remote Code Execution (RCE).
• Exploitation Steps:
  1. Authenticate to the Wallos application.
  2. Navigate to the restore backup function.
  3. Upload a ZIP file containing a web shell or other malicious files.
  4. Execute arbitrary commands through the uploaded web shell.

Detection and Response:

• Log Analysis: Review logs for unusual file uploads and command executions.
• File Integrity Monitoring: Use file integrity monitoring tools to detect unauthorized changes.
• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.

References:

• NVD Entry for CVE-2024-55371
• Datafarm Blog on CVE-2024-55371 and CVE-2024-55372

Conclusion: The EUVD-2025-11492 vulnerability in Wallos is critical and requires immediate attention. Organizations should prioritize patching and implement robust security measures to mitigate the risk of exploitation. Continuous monitoring and a proactive security posture are essential to protect against such vulnerabilities in the future.