Unsanitized user input in code generation

• Rule ID: ruby_lang_reflection_using_user_input
• Languages: ruby
• Source: reflection_using_user_input.yml

Description

Applications should not look up or manipulate code using user-supplied data.

Remediations

❌ Avoid using user input when using reflection:

method(params[:method])

✅ Use user input indirectly when using reflection:

method_name =
  case params[:action]
  when "option1"
    "method1"
  when "option2"
    "method2"
  end

method(method_name)

Resources

• OWASP Code injection explained

Associated CWE

• CWE-94: Improper Control of Generation of Code ('Code Injection')

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=ruby_lang_reflection_using_user_input

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

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