EUVD-2025-37920

Comprehensive Technical Analysis of EUVD-2025-37920

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-37920 pertains to an unauthenticated remote code execution (RCE) flaw in the PocketVJ CP PocketVJ-CP-v3 version 3.9.1. Specifically, the submit_opacity.php component fails to sanitize user input in the opacityValue POST parameter before passing it to a shell command. This oversight allows remote attackers to execute arbitrary commands with root privileges on the underlying system.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: 3.1
• Base Score 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 due to the following factors:

• Attack Vector (AV:N): Network exploitable.
• Attack Complexity (AC:L): Low complexity required for exploitation.
• Privileges Required (PR:N): No privileges are required.
• User Interaction (UI:N): No user interaction is required.
• Scope (S:U): Unchanged.
• Confidentiality (C:H), Integrity (I:H), Availability (A:H): High impact on all three CIA triad components.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Code Execution (RCE): An attacker can send a crafted POST request to the submit_opacity.php endpoint with a malicious opacityValue parameter. This parameter is not properly sanitized, allowing the attacker to inject shell commands.
• Privilege Escalation: Since the commands are executed with root privileges, the attacker can gain full control over the system.

Exploitation Methods:

• Direct Exploitation: An attacker can directly send a POST request with a payload designed to execute arbitrary commands. For example:

  curl -X POST -d "opacityValue=`command`" http://target/submit_opacity.php
  

• Automated Scripts: Attackers can use automated scripts to scan for vulnerable instances of PocketVJ CP and exploit them en masse.

3. Affected Systems and Software Versions

Affected Systems:

• Any system running PocketVJ CP PocketVJ-CP-v3 version 3.9.1.

Software Versions:

• PocketVJ CP PocketVJ-CP-v3 version 3.9.1.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Upgrade to the latest version of PocketVJ CP that addresses this vulnerability.
• Input Sanitization: Ensure that all user inputs are properly sanitized and validated before being used in shell commands.
• Least Privilege: Run the application with the least privileges necessary to minimize the impact of potential exploits.

Long-Term Mitigation:

• Regular Updates: Implement a regular update and patch management process.
• Security Audits: Conduct regular security audits and code reviews to identify and fix similar vulnerabilities.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using PocketVJ CP within the European Union. Given the critical nature of the flaw, successful exploitation could lead to:

• Data Breaches: Unauthorized access to sensitive data.
• System Compromise: Full control over affected systems, leading to potential data loss or corruption.
• Compliance Issues: Violation of data protection regulations such as GDPR, resulting in legal and financial repercussions.

6. Technical Details for Security Professionals

Vulnerability Details:

• Component: submit_opacity.php
• Parameter: opacityValue
• Exploit Type: Unauthenticated RCE
• Privileges: Root

Detection:

• Log Analysis: Monitor logs for unusual shell command executions originating from the submit_opacity.php script.
• Network Traffic: Analyze network traffic for suspicious POST requests to the submit_opacity.php endpoint.

Remediation:

• Code Review: Ensure that all input handling in the application is secure and follows best practices for input validation and sanitization.
• Configuration: Configure the application to run with minimal privileges and restrict access to critical components.

References:

• NVD Entry
• GitHub Gist
• PocketVJ CP Releases

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of exploitation and protect their systems from potential attacks.