EUVD-2025-22914

Comprehensive Technical Analysis of EUVD-2025-22914

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-22914 is a command injection flaw in the CodeIgniter PHP web framework, specifically affecting versions prior to 4.6.2. This vulnerability is critical, with a CVSS base score of 9.8, indicating a high risk to systems using the affected versions. The severity is due to the potential for unauthenticated remote code execution, which can lead to complete system compromise.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability can be exploited remotely over the network.
• AC:L (Low Complexity): The attack requires minimal skill and resources.
• PR:N (No Privileges Required): No authentication is needed to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required for the attack to succeed.
• S:U (Unchanged Scope): The vulnerability does not change the security scope.
• C:H (High Confidentiality Impact): Complete confidentiality breach.
• I:H (High Integrity Impact): Complete integrity breach.
• A:H (High Availability Impact): Complete availability breach.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vectors involve:

• File Uploads with User-Controlled Filenames: An attacker can upload a file with a malicious filename containing shell metacharacters. When the image is processed using the resize() method, the shell metacharacters are executed.
• Text Operations with User-Controlled Content: An attacker can provide malicious text content or options when using the text() method, leading to command execution.

Exploitation Methods:

• File Upload Exploitation: An attacker uploads a file with a name like $(rm -rf /). When the file is processed, the command rm -rf / is executed.
• Text Operation Exploitation: An attacker inputs text like $(rm -rf /) when using the text() method, leading to the execution of the command.

3. Affected Systems and Software Versions

Affected Software:

• CodeIgniter versions prior to 4.6.2

Affected Systems:

• Any web application using CodeIgniter for image processing with the ImageMagick handler (imagick as the image library) and allowing file uploads or text operations with user-controlled input.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Upgrade: Upgrade to CodeIgniter version 4.6.2 or later to apply the patch.
• Switch Image Handler: Switch to the GD image handler (gd), which is not affected by the vulnerability.

Workarounds:

• File Uploads: Use the getRandomName() method with move() or the store() method to generate safe filenames.
• Text Operations: Sanitize input to allow only safe characters and validate/restrict text options.

Best Practices:

• Implement input validation and sanitization for all user-controlled inputs.
• Regularly update and patch all software components.
• Conduct regular security audits and vulnerability assessments.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations using CodeIgniter, particularly those handling sensitive data or providing critical services. The potential for remote code execution can lead to data breaches, service disruptions, and financial losses. Given the widespread use of PHP frameworks in web applications, this vulnerability underscores the importance of robust security practices and timely patch management.

6. Technical Details for Security Professionals

Vulnerability Type:

• Command Injection (CWE-78)

Affected Components:

• ImageMagick handler (imagick) in CodeIgniter

Exploitation Conditions:

• File uploads with user-controlled filenames processed using the resize() method.
• Text operations with user-controlled content or options using the text() method.

Mitigation Code Examples:

• File Uploads:

  $file = $this->request->getFile('userfile');
  $newName = $file->getRandomName();
  $file->move(WRITEPATH . 'uploads', $newName);
  

• Text Operations:

  $text = sanitizeInput($userInput);
  $image->text($text, $options);
  

References:

• GitHub Security Advisory
• GitHub Commit
• CWE-78: Command Injection
• OWASP Command Injection

Conclusion: This vulnerability highlights the importance of secure coding practices, regular updates, and thorough input validation. Organizations should prioritize patching affected systems and implementing robust security measures to mitigate similar risks in the future.