MediumGHSA-83c3-qx27-2rwrCVE-2012-6431

Symfony Allows URI Restrictions Bypass Via Double-Encoded String

Published 17 May 2022 · Updated 3 Dec 2024

Affected packages

symfony/http-foundationComposer
Affected
>=2.0.0 <2.0.19
Fixed in
2.0.19
Update to the fixed version for your release line, for example:composer require symfony/http-foundation:^2.0.19
symfony/routingComposer
Affected
>=2.0.0 <2.0.19
Fixed in
2.0.19
Update to the fixed version for your release line, for example:composer require symfony/routing:^2.0.19
symfony/securityComposer
Affected
>=2.0.0 <2.0.19
Fixed in
2.0.19
Update to the fixed version for your release line, for example:composer require symfony/security:^2.0.19
symfony/symfonyComposer
Affected
>=2.0.0 <2.0.19
Fixed in
2.0.19
Update to the fixed version for your release line, for example:composer require symfony/symfony:^2.0.19

Details

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.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.