Improper Restriction of Rendered UI Layers or Frames in Sylius

Impact

It is possible for a page controlled by an attacker to load the website within an iframe. This will enable a clickjacking attack, in which the attacker's page overlays the target application's interface with a different interface provided by the attacker

Patches

The issue is fixed in versions: 1.9.10, 1.10.11, 1.11.2, and above.

Workarounds

Every response from app should have an X-Frame-Options header set to: sameorigin. To achieve that you just need to add a new subscriber in your app.

<?php

// src/EventListener/XFrameOptionsSubscriber.php

namespace App\EventListener

final class XFrameOptionsSubscriber implements EventSubscriberInterface
{
    public static function getSubscribedEvents(): array
    {
        return [
            KernelEvents::RESPONSE => 'onKernelResponse',
        ];
    }

    public function onKernelResponse(ResponseEvent $event): void
    {
        if (!$this->isMainRequest($event)) {
            return;
        }

        $response = $event->getResponse();

        $response->headers->set('X-Frame-Options', 'sameorigin');
    }

    private function isMainRequest(ResponseEvent $event): bool
    {
        if (\method_exists($event, 'isMainRequest')) {
            return $event->isMainRequest();
        }

        return $event->isMasterRequest();
    }
}

And register it in the container:

# config/services.yaml
services:
    # ...
    App\EventListener\XFrameOptionsSubscriber:
        tags: ['kernel.event_subscriber']

For more information

If you have any questions or comments about this advisory:

• Open an issue in Sylius issues
• Email us at security@sylius.com