/usr/share/php/Symfony/ is in php-symfony-security-http 3.4.6+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Symfony/Component/
/usr/share/php/Symfony/Component/Security/
/usr/share/php/Symfony/Component/Security/Http/
/usr/share/php/Symfony/Component/Security/Http/AccessMap.php
/usr/share/php/Symfony/Component/Security/Http/AccessMapInterface.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/
/usr/share/php/Symfony/Component/Security/Http/Authentication/AuthenticationFailureHandlerInterface.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/AuthenticationSuccessHandlerInterface.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/AuthenticationUtils.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/CustomAuthenticationFailureHandler.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/CustomAuthenticationSuccessHandler.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationFailureHandler.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationSuccessHandler.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/SimpleFormAuthenticatorInterface.php
/usr/share/php/Symfony/Component/Security/Http/Authentication/SimplePreAuthenticatorInterface.php
/usr/share/php/Symfony/Component/Security/Http/Authorization/
/usr/share/php/Symfony/Component/Security/Http/Authorization/AccessDeniedHandlerInterface.php
/usr/share/php/Symfony/Component/Security/Http/EntryPoint/
/usr/share/php/Symfony/Component/Security/Http/EntryPoint/AuthenticationEntryPointInterface.php
/usr/share/php/Symfony/Component/Security/Http/EntryPoint/BasicAuthenticationEntryPoint.php
/usr/share/php/Symfony/Component/Security/Http/EntryPoint/DigestAuthenticationEntryPoint.php
/usr/share/php/Symfony/Component/Security/Http/EntryPoint/FormAuthenticationEntryPoint.php
/usr/share/php/Symfony/Component/Security/Http/EntryPoint/RetryAuthenticationEntryPoint.php
/usr/share/php/Symfony/Component/Security/Http/Event/
/usr/share/php/Symfony/Component/Security/Http/Event/InteractiveLoginEvent.php
/usr/share/php/Symfony/Component/Security/Http/Event/SwitchUserEvent.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/
/usr/share/php/Symfony/Component/Security/Http/Firewall.php
/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/UsernamePasswordJsonAuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/Firewall/X509AuthenticationListener.php
/usr/share/php/Symfony/Component/Security/Http/FirewallMap.php
/usr/share/php/Symfony/Component/Security/Http/FirewallMapInterface.php
/usr/share/php/Symfony/Component/Security/Http/HttpUtils.php
/usr/share/php/Symfony/Component/Security/Http/Logout/
/usr/share/php/Symfony/Component/Security/Http/Logout/CookieClearingLogoutHandler.php
/usr/share/php/Symfony/Component/Security/Http/Logout/DefaultLogoutSuccessHandler.php
/usr/share/php/Symfony/Component/Security/Http/Logout/LogoutHandlerInterface.php
/usr/share/php/Symfony/Component/Security/Http/Logout/LogoutSuccessHandlerInterface.php
/usr/share/php/Symfony/Component/Security/Http/Logout/LogoutUrlGenerator.php
/usr/share/php/Symfony/Component/Security/Http/Logout/SessionLogoutHandler.php
/usr/share/php/Symfony/Component/Security/Http/ParameterBagUtils.php
/usr/share/php/Symfony/Component/Security/Http/RememberMe/
/usr/share/php/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php
/usr/share/php/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php
/usr/share/php/Symfony/Component/Security/Http/RememberMe/RememberMeServicesInterface.php
/usr/share/php/Symfony/Component/Security/Http/RememberMe/ResponseListener.php
/usr/share/php/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php
/usr/share/php/Symfony/Component/Security/Http/SecurityEvents.php
/usr/share/php/Symfony/Component/Security/Http/Session/
/usr/share/php/Symfony/Component/Security/Http/Session/SessionAuthenticationStrategy.php
/usr/share/php/Symfony/Component/Security/Http/Session/SessionAuthenticationStrategyInterface.php
/usr/share/php/Symfony/Component/Security/Http/Util/
/usr/share/php/Symfony/Component/Security/Http/Util/TargetPathTrait.php
/usr/share/php/Symfony/Component/Security/Http/autoload.php