From fe780945e2c1f9cd57b3a5f4b3e275ef45c7cb6e Mon Sep 17 00:00:00 2001 From: Hamza Mahjoubi Date: Fri, 5 Apr 2024 00:00:49 +0200 Subject: [PATCH] fix(dav): Rate limit address book creation Signed-off-by: Hamza Mahjoubi --- apps/dav/appinfo/v1/carddav.php | 2 + .../composer/composer/autoload_classmap.php | 1 + .../dav/composer/composer/autoload_static.php | 1 + .../Security/CardDavRateLimitingPlugin.php | 87 +++++++++++ apps/dav/lib/Server.php | 3 + .../CardDavRateLimitingPluginTest.php | 146 ++++++++++++++++++ 6 files changed, 240 insertions(+) create mode 100644 apps/dav/lib/CardDAV/Security/CardDavRateLimitingPlugin.php create mode 100644 apps/dav/tests/unit/CardDAV/Security/CardDavRateLimitingPluginTest.php diff --git a/apps/dav/appinfo/v1/carddav.php b/apps/dav/appinfo/v1/carddav.php index 70e5de1b481d9..e2ea9fe0bc374 100644 --- a/apps/dav/appinfo/v1/carddav.php +++ b/apps/dav/appinfo/v1/carddav.php @@ -32,6 +32,7 @@ use OCA\DAV\AppInfo\PluginManager; use OCA\DAV\CardDAV\AddressBookRoot; use OCA\DAV\CardDAV\CardDavBackend; +use OCA\DAV\CardDAV\Security\CardDavRateLimitingPlugin; use OCA\DAV\Connector\LegacyDAVACL; use OCA\DAV\Connector\Sabre\Auth; use OCA\DAV\Connector\Sabre\ExceptionLoggerPlugin; @@ -109,6 +110,7 @@ \OC::$server->get(LoggerInterface::class) ))); $server->addPlugin(new ExceptionLoggerPlugin('carddav', \OC::$server->get(LoggerInterface::class))); +$server->addPlugin(\OCP\Server::get(CardDavRateLimitingPlugin::class)); // And off we go! $server->exec(); diff --git a/apps/dav/composer/composer/autoload_classmap.php b/apps/dav/composer/composer/autoload_classmap.php index 1aff4d758c79a..8c7e2dc91fc0d 100644 --- a/apps/dav/composer/composer/autoload_classmap.php +++ b/apps/dav/composer/composer/autoload_classmap.php @@ -134,6 +134,7 @@ 'OCA\\DAV\\CardDAV\\MultiGetExportPlugin' => $baseDir . '/../lib/CardDAV/MultiGetExportPlugin.php', 'OCA\\DAV\\CardDAV\\PhotoCache' => $baseDir . '/../lib/CardDAV/PhotoCache.php', 'OCA\\DAV\\CardDAV\\Plugin' => $baseDir . '/../lib/CardDAV/Plugin.php', + 'OCA\\DAV\\CardDAV\\Security\\CardDavRateLimitingPlugin' => $baseDir . '/../lib/CardDAV/Security/CardDavRateLimitingPlugin.php', 'OCA\\DAV\\CardDAV\\Sharing\\Backend' => $baseDir . '/../lib/CardDAV/Sharing/Backend.php', 'OCA\\DAV\\CardDAV\\Sharing\\Service' => $baseDir . '/../lib/CardDAV/Sharing/Service.php', 'OCA\\DAV\\CardDAV\\SyncService' => $baseDir . '/../lib/CardDAV/SyncService.php', diff --git a/apps/dav/composer/composer/autoload_static.php b/apps/dav/composer/composer/autoload_static.php index 9850414b8affd..dd133eaefaa9f 100644 --- a/apps/dav/composer/composer/autoload_static.php +++ b/apps/dav/composer/composer/autoload_static.php @@ -155,6 +155,7 @@ class ComposerStaticInitDAV 'OCA\\DAV\\CardDAV\\SystemAddressbook' => __DIR__ . '/..' . '/../lib/CardDAV/SystemAddressbook.php', 'OCA\\DAV\\CardDAV\\UserAddressBooks' => __DIR__ . '/..' . '/../lib/CardDAV/UserAddressBooks.php', 'OCA\\DAV\\CardDAV\\Xml\\Groups' => __DIR__ . '/..' . '/../lib/CardDAV/Xml/Groups.php', + 'OCA\\DAV\\CardDAV\\Security\\CardDavRateLimitingPlugin' => __DIR__ . '/..' . '/../lib/CardDAV/Security/CardDavRateLimitingPlugin.php', 'OCA\\DAV\\Command\\CreateAddressBook' => __DIR__ . '/..' . '/../lib/Command/CreateAddressBook.php', 'OCA\\DAV\\Command\\CreateCalendar' => __DIR__ . '/..' . '/../lib/Command/CreateCalendar.php', 'OCA\\DAV\\Command\\DeleteCalendar' => __DIR__ . '/..' . '/../lib/Command/DeleteCalendar.php', diff --git a/apps/dav/lib/CardDAV/Security/CardDavRateLimitingPlugin.php b/apps/dav/lib/CardDAV/Security/CardDavRateLimitingPlugin.php new file mode 100644 index 0000000000000..65f20a955fdbe --- /dev/null +++ b/apps/dav/lib/CardDAV/Security/CardDavRateLimitingPlugin.php @@ -0,0 +1,87 @@ +limiter = $limiter; + $this->userManager = $userManager; + $this->cardDavBackend = $cardDavBackend; + $this->config = $config; + $this->logger = $logger; + $this->userId = $userId; + } + + public function initialize(DAV\Server $server): void { + $server->on('beforeBind', [$this, 'beforeBind'], 1); + } + + public function beforeBind(string $path): void { + if ($this->userId === null) { + // We only care about authenticated users here + return; + } + $user = $this->userManager->get($this->userId); + if ($user === null) { + // We only care about authenticated users here + return; + } + + $pathParts = explode('/', $path); + if (count($pathParts) === 4 && $pathParts[0] === 'addressbooks') { + // Path looks like addressbooks/users/username/addressbooksname so a new addressbook is created + try { + $this->limiter->registerUserRequest( + 'carddav-create-address-book', + $this->config->getValueInt('dav', 'rateLimitAddressBookCreation', 10), + $this->config->getValueInt('dav', 'rateLimitPeriodAddressBookCreation', 3600), + $user + ); + } catch (RateLimitExceededException $e) { + throw new TooManyRequests('Too many addressbooks created', 0, $e); + } + + $addressBookLimit = $this->config->getValueInt('dav', 'maximumAdressbooks', 10); + if ($addressBookLimit === -1) { + return; + } + $numAddressbooks = $this->cardDavBackend->getAddressBooksForUserCount('principals/users/' . $user->getUID()); + + if ($numAddressbooks >= $addressBookLimit) { + $this->logger->warning('Maximum number of address books reached', [ + 'addressbooks' => $numAddressbooks, + 'addressBookLimit' => $addressBookLimit, + ]); + throw new Forbidden('AddressBook limit reached', 0); + } + } + } + +} diff --git a/apps/dav/lib/Server.php b/apps/dav/lib/Server.php index 37d04ba819048..37abcb9db4734 100644 --- a/apps/dav/lib/Server.php +++ b/apps/dav/lib/Server.php @@ -45,6 +45,7 @@ use OCA\DAV\CardDAV\ImageExportPlugin; use OCA\DAV\CardDAV\MultiGetExportPlugin; use OCA\DAV\CardDAV\PhotoCache; +use OCA\DAV\CardDAV\Security\CardDavRateLimitingPlugin; use OCA\DAV\Comments\CommentsPlugin; use OCA\DAV\Connector\Sabre\AnonymousOptionsPlugin; use OCA\DAV\Connector\Sabre\Auth; @@ -208,6 +209,8 @@ public function __construct(IRequest $request, string $baseUri) { \OC::$server->getAppDataDir('dav-photocache'), $logger) )); + + $this->server->addPlugin(\OCP\Server::get(CardDavRateLimitingPlugin::class)); } // system tags plugins diff --git a/apps/dav/tests/unit/CardDAV/Security/CardDavRateLimitingPluginTest.php b/apps/dav/tests/unit/CardDAV/Security/CardDavRateLimitingPluginTest.php new file mode 100644 index 0000000000000..68819f68fcea2 --- /dev/null +++ b/apps/dav/tests/unit/CardDAV/Security/CardDavRateLimitingPluginTest.php @@ -0,0 +1,146 @@ +limiter = $this->createMock(Limiter::class); + $this->userManager = $this->createMock(IUserManager::class); + $this->cardDavBackend = $this->createMock(CardDavBackend::class); + $this->logger = $this->createMock(LoggerInterface::class); + $this->config = $this->createMock(IAppConfig::class); + $this->plugin = new CardDavRateLimitingPlugin( + $this->limiter, + $this->userManager, + $this->cardDavBackend, + $this->logger, + $this->config, + $this->userId, + ); + } + + public function testNoUserObject(): void { + $this->limiter->expects(self::never()) + ->method('registerUserRequest'); + + $this->plugin->beforeBind('addressbooks/users/foo/addressbookname'); + } + + public function testUnrelated(): void { + $user = $this->createMock(IUser::class); + $this->userManager->expects(self::once()) + ->method('get') + ->with($this->userId) + ->willReturn($user); + $this->limiter->expects(self::never()) + ->method('registerUserRequest'); + + $this->plugin->beforeBind('foo/bar'); + } + + public function testRegisterAddressBookrCreation(): void { + $user = $this->createMock(IUser::class); + $this->userManager->expects(self::once()) + ->method('get') + ->with($this->userId) + ->willReturn($user); + $this->config + ->method('getValueInt') + ->with('dav') + ->willReturnArgument(2); + $this->limiter->expects(self::once()) + ->method('registerUserRequest') + ->with( + 'carddav-create-address-book', + 10, + 3600, + $user, + ); + + $this->plugin->beforeBind('addressbooks/users/foo/addressbookname'); + } + + public function testAddressBookCreationRateLimitExceeded(): void { + $user = $this->createMock(IUser::class); + $this->userManager->expects(self::once()) + ->method('get') + ->with($this->userId) + ->willReturn($user); + $this->config + ->method('getValueInt') + ->with('dav') + ->willReturnArgument(2); + $this->limiter->expects(self::once()) + ->method('registerUserRequest') + ->with( + 'carddav-create-address-book', + 10, + 3600, + $user, + ) + ->willThrowException(new RateLimitExceededException()); + $this->expectException(TooManyRequests::class); + + $this->plugin->beforeBind('addressbooks/users/foo/addressbookname'); + } + + public function testAddressBookLimitReached(): void { + $user = $this->createMock(IUser::class); + $this->userManager->expects(self::once()) + ->method('get') + ->with($this->userId) + ->willReturn($user); + $user->method('getUID')->willReturn('user123'); + $this->config + ->method('getValueInt') + ->with('dav') + ->willReturnArgument(2); + $this->limiter->expects(self::once()) + ->method('registerUserRequest') + ->with( + 'carddav-create-address-book', + 10, + 3600, + $user, + ); + $this->cardDavBackend->expects(self::once()) + ->method('getAddressBooksForUserCount') + ->with('principals/users/user123') + ->willReturn(11); + $this->expectException(Forbidden::class); + + $this->plugin->beforeBind('addressbooks/users/foo/addressbookname'); + } + +}