Plataforma
ruby
Componente
rails
Corrigido em
2.3.3
CVE-2009-2422 is a critical authentication bypass vulnerability affecting Ruby on Rails versions 2.3.2 and earlier. The flaw resides within the example code for HTTP digest authentication, specifically the http_authentication.rb file. This allows attackers to potentially bypass authentication mechanisms in applications derived from this example by sending invalid usernames without passwords, leading to unauthorized access.
The primary impact of CVE-2009-2422 is unauthorized access to applications using the vulnerable digest authentication example. An attacker can bypass authentication by sending a request with an invalid username and no password. This is particularly concerning for applications that directly incorporate or adapt this example code without proper validation and error handling. The blast radius extends to any application relying on this flawed authentication logic, potentially exposing sensitive data and system resources. While the vulnerability is within an example, its inclusion in custom applications makes it a significant risk.
CVE-2009-2422 was publicly disclosed in 2017, although the vulnerability itself dates back to 2009. While no active exploitation campaigns have been widely reported, the vulnerability's severity and ease of exploitation make it a potential target. It is not currently listed on the CISA KEV catalog. Public proof-of-concept exploits are available, demonstrating the bypass technique.
Applications built using Ruby on Rails versions 2.3.2 or earlier, particularly those that directly incorporate or adapt the example code for HTTP digest authentication, are at significant risk. Custom authentication implementations based on this example are also vulnerable, regardless of the Rails version.
• ruby / server:
grep -r 'authenticate_or_request_with_http_digest' /path/to/rails/app/controllers/• ruby / supply-chain: Check Gemfile for dependencies on older Rails versions.
gem list | grep rails• generic web: Inspect application code for direct usage of the http_authentication.rb example or similar authentication logic.
discovery
disclosure
patch
Status do Exploit
EPSS
0.40% (percentil 61%)
Vetor CVSS
The definitive mitigation for CVE-2009-2422 is to upgrade to Ruby on Rails version 2.3.3 or later, which contains the fix. If upgrading is not immediately feasible, carefully review and refactor any custom authentication logic derived from the http_authentication.rb example. Ensure that authentication failures are handled correctly, returning false instead of nil when a user does not exist. Consider implementing stricter input validation and error handling to prevent similar bypasses in the future. After upgrading, confirm the fix by attempting authentication with an invalid username and verifying that authentication fails as expected.
Nenhum patch oficial disponível. Procure alternativas ou monitore atualizações.
Análise de vulnerabilidades e alertas críticos diretamente no seu e-mail.
CVE-2009-2422 is a critical vulnerability in Ruby on Rails versions 2.3.2 and earlier where an attacker can bypass authentication by sending an invalid username without a password due to a flaw in the digest authentication example code.
You are affected if you are using Ruby on Rails version 2.3.2 or earlier, and your application uses or is derived from the HTTP digest authentication example code.
Upgrade to Ruby on Rails version 2.3.3 or later. If upgrading isn't possible, review and refactor any custom authentication logic derived from the vulnerable example code.
While no widespread active exploitation has been reported, the vulnerability's severity and ease of exploitation make it a potential target.
Refer to the Ruby on Rails security advisories and release notes for version 2.3.3 for details on the fix: https://github.com/rails/rails/releases/tag/v2.3.3
Envie seu arquivo de dependências e descubra na hora se esta e outras CVEs te atingem.
Envie seu arquivo Gemfile.lock e descubra na hora se você está afetado.