Symfony Allows URI Restrictions Bypass Via Double-Encoded String
On the Symfony 2.0.x version, there's a security issue that allows access to routes protected by a firewall even when the user is not logged in.
Both the Routing component and the Security component uses the path returned by getPathInfo() to match a Request. The getPathInfo() returns a decoded path, but the Routing component (Symfony\Component\Routing\Matcher\UrlMatcher) decodes the path a second time; whereas the Security component, Symfony\Component\HttpFoundation\RequestMatcher, does not.
This difference causes Symfony 2.0 to be vulnerable to double encoding attacks.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | symfony/http-foundation | >= 2.0.0, < 2.0.19 | 2.0.19 |
| Paquete de Composer | symfony/routing | >= 2.0.0, < 2.0.19 | 2.0.19 |
| Paquete de Composer | symfony/security | >= 2.0.0, < 2.0.19 | 2.0.19 |
| Paquete de Composer | symfony/symfony | >= 2.0.0, < 2.0.19 | 2.0.19 |
Referencias
- https://nvd.nist.gov/vuln/detail/CVE-2012-6431
- https://github.com/symfony/symfony/commit/55014a6841bec50046e8329a4835c160ac31a496
- https://github.com/symfony/symfony/commit/8b2c17f80377582287a78e0b521497e039dd6b0d
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2012-6431.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/routing/CVE-2012-6431.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2012-6431.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2012-6431.yaml
- https://symfony.com/blog/security-release-symfony-2-0-20-and-2-1-5-released
- http://symfony.com/blog/security-release-symfony-2-0-20-and-2-1-5-released
- Debilidad (CWE)
CWE-287- Plataforma
- Composer
- Paquete
symfony/http-foundation, symfony/routing, symfony/security- Publicada
- 17.05.2022
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-83c3-qx27-2rwr - CC BY 4.0
Historial de vulnerabilidades: symfony/security
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 17
- Primera → última
- 02.2020 05.2022
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 3
- Alta 7
- Media 6
- Baja 1
Divulgaciones por año
- 2020: 2
- 2021: 1
- 2022: 14
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
-
Symfony Allows URI Restrictions Bypass Via Double-Encoded String esta entrada
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