GHSA-83c3-qx27-2rwr Symfony Allows URI Restrictions Bypass Via Double-Encoded String

• Packagist symfony/http-foundation: >= 2.0.0, < 2.0.19 → fixed in 2.0.19 • Packagist symfony/routing: >= 2.0.0, < 2.0.19 → fixed in 2.0.19 • Packagist symfony/security: >= 2.0.0, < 2.0.19 → fixed in 2.0.19 • Packagist symfony/symfony: >= 2.0.0, < 2.0.19 → fixed in 2.0.19

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.