EUVD-2025-199675

Comprehensive Technical Analysis of EUVD-2025-199675

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability EUVD-2025-199675 pertains to an unauthenticated arbitrary file deletion issue in the patch_contents.php script of DB Electronica Telecomunicazioni S.p.A.'s Mozart FM Transmitter. This flaw allows an attacker to delete arbitrary files within the /var/www/patch/ directory without any authentication or access control checks.

Severity Evaluation: The vulnerability has a CVSS base score of 9.2, which is classified as critical. The CVSS vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:N indicates the following:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Authentication (AT): None (N)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Confidentiality Impact (VC): None (N)
• Integrity Impact (VI): High (H)
• Availability Impact (VA): High (H)
• Scope (SC): None (N)
• Scope Impact (SI): High (H)
• Scope Availability (SA): None (N)

This score reflects the high potential for significant disruption and data integrity compromise.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: Given the network attack vector, an attacker can exploit this vulnerability remotely over the internet.
• Unauthenticated Access: The lack of authentication requirements means that any user with network access can potentially exploit this vulnerability.

Exploitation Methods:

• Direct File Deletion: An attacker can send a crafted HTTP request to the patch_contents.php script with the deletepatch parameter set to the target file's path within the /var/www/patch/ directory.
• Automated Scripts: Attackers can use automated scripts to systematically delete files, leading to widespread disruption.

3. Affected Systems and Software Versions

The vulnerability affects multiple versions of the Mozart FM Transmitter, including:

• Versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, and 7000.

4. Recommended Mitigation Strategies

Immediate Mitigations:

• Access Controls: Implement strict access controls to restrict access to the patch_contents.php script.
• Input Validation: Ensure proper input validation and sanitization for the deletepatch parameter.
• Authentication: Require authentication for any file deletion operations.
• Patching: Apply the vendor-provided patch as soon as it becomes available.

Long-Term Mitigations:

• Regular Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.
• Monitoring: Implement continuous monitoring to detect and respond to any suspicious activities related to file deletion.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations using the Mozart FM Transmitter. The potential for unauthenticated file deletion can lead to:

• Service Disruption: Critical services relying on the transmitter could be disrupted.
• Data Integrity Issues: Important files could be deleted, leading to data loss and integrity issues.
• Compliance Risks: Organizations may face compliance issues if critical data is compromised.

6. Technical Details for Security Professionals

Technical Analysis:

• Vulnerable Script: patch_contents.php
• Parameter: deletepatch
• Directory: /var/www/patch/
• Exploitation: The script does not perform adequate sanitization or access control checks on the deletepatch parameter, allowing unauthenticated deletion of files.

Detection and Response:

• Logging: Enable detailed logging for the patch_contents.php script to monitor for suspicious activities.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on unauthorized file deletion attempts.
• Incident Response Plan: Develop and implement an incident response plan to quickly address any detected exploitation attempts.

Conclusion: The vulnerability EUVD-2025-199675 is a critical issue that requires immediate attention. Organizations using the affected versions of the Mozart FM Transmitter should prioritize applying the recommended mitigations and closely monitor their systems for any signs of exploitation. The potential impact on service availability and data integrity underscores the urgency of addressing this vulnerability promptly.

References:

• Abdulmhsblog Post
• NVD Detail

By following these recommendations, organizations can significantly reduce the risk associated with this vulnerability and enhance their overall cybersecurity posture.