/usr/share/php/Symfony/Component/Security/Http/Firewall/ is in php-symfony-security 2.7.10-0ubuntu2.
This file is owned by root:root, with mode 0o755.
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/usr/share/php/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/AbstractPreAuthenticatedListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/AccessListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/AnonymousAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/BasicAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/ChannelListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/ContextListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/DigestAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/ExceptionListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/ListenerInterface.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/LogoutListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/RememberMeListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/RemoteUserAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/SimpleFormAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/X509AuthenticationListener.php