EUVD-2025-205349

Comprehensive Technical Analysis of EUVD-2025-205349

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-205349 pertains to a CSV injection flaw in Anviz AIM CrossChex Standard version 4.3.6.0. This vulnerability allows attackers to execute commands by inserting malicious formulas in user import fields, such as 'Name', 'Gender', or 'Position'. The Base Score of 9.3, as per CVSS 4.0, 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 highlights the following:

• Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Authentication (AT): None (N) - No authentication is required to exploit the vulnerability.
• Privileges Required (PR): None (N) - No special privileges are needed.
• User Interaction (UI): None (N) - No user interaction is required.
• Confidentiality (VC): High (H) - The vulnerability can lead to a significant breach of confidentiality.
• Integrity (VI): High (H) - The vulnerability can lead to a significant breach of integrity.
• Availability (VA): High (H) - The vulnerability can lead to a significant breach of availability.

2. Potential Attack Vectors and Exploitation Methods

Attackers can exploit this vulnerability by crafting malicious CSV files with embedded formulas that trigger Excel macro execution. The primary attack vectors include:

• Phishing Emails: Sending malicious CSV files to users who might import them into the Anviz AIM CrossChex system.
• Supply Chain Attacks: Compromising third-party vendors or partners who provide CSV files for user data import.
• Direct Uploads: If the system allows direct CSV uploads, attackers can upload crafted files directly.

Exploitation methods involve embedding formulas like =CMD|'/C calc'!A0 in CSV fields, which can execute arbitrary commands when the file is opened in Excel.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Anviz AIM CrossChex Standard version 4.3.6.0

Other versions of Anviz AIM CrossChex Standard may also be affected, but this has not been confirmed. Organizations using this software should verify the version in use and apply necessary patches.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following strategies are recommended:

• Patch Management: Apply the latest patches and updates provided by Anviz Biometric Technology Co., Ltd.
• Input Validation: Implement strict input validation for CSV files to prevent the inclusion of malicious formulas.
• User Training: Educate users on the risks of opening unsolicited CSV files and the importance of verifying file sources.
• Network Segmentation: Segment networks to limit the spread of potential attacks and isolate critical systems.
• Monitoring and Logging: Enhance monitoring and logging to detect and respond to suspicious activities related to CSV file imports.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations using Anviz AIM CrossChex Standard for biometric and access control systems. The potential for remote command execution can lead to data breaches, unauthorized access, and disruption of services. Given the critical nature of biometric systems in security and access control, the impact could be severe, affecting both public and private sectors.

6. Technical Details for Security Professionals

Detection:

• File Analysis: Implement tools to analyze CSV files for embedded formulas before import.
• Behavioral Analysis: Monitor for unusual command executions or macro activities following CSV imports.

Response:

• Incident Response Plan: Develop and maintain an incident response plan specific to CSV injection attacks.
• Forensic Analysis: Conduct forensic analysis to trace the source of malicious CSV files and identify compromised systems.

Prevention:

• Secure Coding Practices: Ensure that software developers follow secure coding practices to prevent similar vulnerabilities in future releases.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential risks.

References:

• NVD: CVE-2018-25135
• Exploit Database: Exploit-DB Entry
• Zero Science: ZSL-2018-5498

By addressing this vulnerability proactively, organizations can significantly reduce the risk of exploitation and maintain the integrity and security of their systems.