Usage of externally controlled input to select code

• Rule ID: javascript_lang_import_using_user_input
• Languages: javascript
• Source: import_using_user_input.yml

Description

Loading code dynamically from a path dictated by user input can allow attackers to execute arbitrary code on your system.

Remediations

• Do not pass user or request input directly to the require() function. This practice can lead to severe security vulnerabilities.
• Do sanitize user input if it must be used to dynamically load code. Ensure that the input is checked and cleaned to prevent malicious data from being processed.
• Do use a safelist approach when relying on user input to load code dynamically. Verify that the input matches a predefined list of safe values before processing.

  var path = req.body.path;
  if (['users', 'posts', 'pages'].includes(path)) {
    require(`${path}.js`);
  }

Associated CWE

• CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

OWASP Top 10

• A03:2021 - Injection

Configuration

To skip this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --skip-rule=javascript_lang_import_using_user_input

To run only this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --only-rule=javascript_lang_import_using_user_input