Unsanitized user input in redirect

• Rule ID: ruby_rails_open_redirect
• Languages: ruby
• Source: open_redirect.yml

Description

Using unsanitized user input to perform redirects can make your application vulnerable to phishing attacks. This occurs when user input is directly used to determine the destination of a redirect without proper validation or sanitization, allowing attackers to redirect users to malicious sites, potentially compromising their security.

Remediations

• Do not use unsanitized user input when constructing URLs for redirects. Directly incorporating user input without validation can lead to phishing attacks and malicious site redirection.
• Do validate user input by employing a safe list or a mapping strategy for constructing URLs. This ensures that the redirection is to a known, safe location.

  transport_path = case params[:transport_type]
    when "planes"
      planes_path
    when "trains"
      trains_path
    when "automobiles"
      automobiles_path
    else
      root_path
    end
  
  redirect_to transport_path

References

• OWASP Unvalidated Redirects and Forwards Cheat Sheet

Associated CWE

• CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

OWASP Top 10

• A01:2021 - Broken Access Control

Configuration

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

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

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

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