feat(security): Add a bruteforce protection backend base on memcache

apps/settings/lib/Controller/CheckSetupController.php

@@ -90,6 +90,7 @@
 use OCP\IURLGenerator;
 use OCP\Lock\ILockingProvider;
 use OCP\Notification\IManager;
+use OCP\Security\Bruteforce\IThrottler;
 use OCP\Security\ISecureRandom;
 use Psr\Log\LoggerInterface;
 
@@ -123,6 +124,8 @@
 	private $iniGetWrapper;
 	/** @var IDBConnection */
 	private $connection;
+	/** @var IThrottler */
+	private $throttler;
 	/** @var ITempManager */
 	private $tempManager;
 	/** @var IManager */
@@ -148,6 +151,7 @@
 								ISecureRandom $secureRandom,
 								IniGetWrapper $iniGetWrapper,
 								IDBConnection $connection,
+								IThrottler $throttler,
 								ITempManager $tempManager,
 								IManager $manager,
 								IAppManager $appManager,
@@ -162,6 +166,7 @@
 		$this->logger = $logger;
 		$this->dispatcher = $dispatcher;
 		$this->db = $db;
+		$this->throttler = $throttler;
 		$this->lockingProvider = $lockingProvider;
 		$this->dateTimeFormatter = $dateTimeFormatter;
 		$this->memoryInfo = $memoryInfo;
@@ -920,6 +925,8 @@
 				'cronInfo' => $this->getLastCronInfo(),
 				'cronErrors' => $this->getCronErrors(),
 				'isFairUseOfFreePushService' => $this->isFairUseOfFreePushService(),
+				'isBruteforceThrottled' => $this->throttler->getAttempts($this->request->getRemoteAddress()) !== 0,
+				'bruteforceRemoteAddress' => $this->request->getRemoteAddress(),
 				'serverHasInternetConnectionProblems' => $this->hasInternetConnectivityProblems(),
 				'isMemcacheConfigured' => $this->isMemcacheConfigured(),
 				'memcacheDocs' => $this->urlGenerator->linkToDocs('admin-performance'),

apps/settings/tests/Controller/CheckSetupControllerTest.php

@@ -59,6 +59,7 @@
 use OCP\IURLGenerator;
 use OCP\Lock\ILockingProvider;
 use OCP\Notification\IManager;
+use OCP\Security\Bruteforce\IThrottler;
 use PHPUnit\Framework\MockObject\MockObject;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Log\LoggerInterface;
@@ -143,6 +144,7 @@ protected function setUp(): void {
 		$this->logger = $this->getMockBuilder(LoggerInterface::class)->getMock();
 		$this->db = $this->getMockBuilder(Connection::class)
 			->disableOriginalConstructor()->getMock();
+		$this->throttler = $this->createMock(IThrottler::class);
 		$this->lockingProvider = $this->getMockBuilder(ILockingProvider::class)->getMock();
 		$this->dateTimeFormatter = $this->getMockBuilder(IDateTimeFormatter::class)->getMock();
 		$this->memoryInfo = $this->getMockBuilder(MemoryInfo::class)
@@ -174,6 +176,7 @@ protected function setUp(): void {
 				$this->secureRandom,
 				$this->iniGetWrapper,
 				$this->connection,
+				$this->throttler,
 				$this->tempManager,
 				$this->notificationManager,
 				$this->appManager,
@@ -659,6 +662,8 @@ public function testCheck() {
 				'isFairUseOfFreePushService' => false,
 				'temporaryDirectoryWritable' => false,
 				\OCA\Settings\SetupChecks\LdapInvalidUuids::class => ['pass' => true, 'description' => 'Invalid UUIDs of LDAP users or groups have been found. Please review your "Override UUID detection" settings in the Expert part of the LDAP configuration and use "occ ldap:update-uuid" to update them.', 'severity' => 'warning'],
+				'isBruteforceThrottled' => false,
+				'bruteforceRemoteAddress' => '',
 			]
 		);
 		$this->assertEquals($expected, $this->checkSetupController->check());
@@ -683,6 +688,7 @@ public function testGetCurlVersion() {
 				$this->secureRandom,
 				$this->iniGetWrapper,
 				$this->connection,
+				$this->throttler,
 				$this->tempManager,
 				$this->notificationManager,
 				$this->appManager,
@@ -1410,6 +1416,7 @@ public function testIsMysqlUsedWithoutUTF8MB4(string $db, bool $useUTF8MB4, bool
 			$this->secureRandom,
 			$this->iniGetWrapper,
 			$this->connection,
+			$this->throttler,
 			$this->tempManager,
 			$this->notificationManager,
 			$this->appManager,
@@ -1464,6 +1471,7 @@ public function testIsEnoughTempSpaceAvailableIfS3PrimaryStorageIsUsed(string $m
 			$this->secureRandom,
 			$this->iniGetWrapper,
 			$this->connection,
+			$this->throttler,
 			$this->tempManager,
 			$this->notificationManager,
 			$this->appManager,

config/config.sample.php

@@ -352,6 +352,19 @@
  */
 'auth.bruteforce.protection.enabled' => true,
 
+/**
+ * Whether the bruteforce protection shipped with Nextcloud should be set to testing mode.
+ *
+ * In testing mode bruteforce attempts are still recorded, but the requests do
+ * not sleep/wait for the specified time. They will still abort with
+ * "429 Too Many Requests" when the maximum delay is reached.
+ * Enabling this is discouraged for security reasons
+ * and should only be done for debugging and on CI when running tests.
+ *
+ * Defaults to ``false``
+ */
+'auth.bruteforce.protection.testing' => false,
+
 /**
  * Whether the rate limit protection shipped with Nextcloud should be enabled or not.
  *

core/Command/Security/BruteforceAttempts.php

@@ -0,0 +1,82 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2023 Joas Schilling <[email protected]>
+ *
+ * @author Joas Schilling <[email protected]>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OC\Core\Command\Security;
+
+use OC\Core\Command\Base;
+use OCP\Security\Bruteforce\IThrottler;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class BruteforceAttempts extends Base {
+	public function __construct(
+		protected IThrottler $throttler,
+	) {
+		parent::__construct();
+	}
+
+	protected function configure(): void {
+		parent::configure();
+		$this
+			->setName('security:bruteforce:attempts')
+			->setDescription('resets bruteforce attempts for given IP address')
+			->addArgument(
+				'ipaddress',
+				InputArgument::REQUIRED,
+				'IP address for which the attempts are to be reset',
+			)
+			->addArgument(
+				'action',
+				InputArgument::OPTIONAL,
+				'Only count attempts for the given action',
+			)
+		;
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output): int {
+		$ip = $input->getArgument('ipaddress');
+
+		if (!filter_var($ip, FILTER_VALIDATE_IP)) {
+			$output->writeln('<error>"' . $ip . '" is not a valid IP address</error>');
+			return 1;
+		}
+
+		$data = [
+			'bypass-listed' => $this->throttler->isBypassListed($ip),
+			'attempts' => $this->throttler->getAttempts(
+				$ip,
+				(string) $input->getArgument('action'),
+			),
+			'delay' => $this->throttler->getDelay(
+				$ip,
+				(string) $input->getArgument('action'),
+			),
+		];
+
+		$this->writeArrayInOutputFormat($input, $output, $data);
+
+		return 0;
+	}
+}

core/Command/Security/ResetBruteforceAttempts.php → core/Command/Security/BruteforceResetAttempts.php

@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2020, Johannes Riedel ([email protected])
  *
@@ -24,22 +26,22 @@
 namespace OC\Core\Command\Security;
 
 use OC\Core\Command\Base;
-use OC\Security\Bruteforce\Throttler;
+use OCP\Security\Bruteforce\IThrottler;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 
-class ResetBruteforceAttempts extends Base {
+class BruteforceResetAttempts extends Base {
 	public function __construct(
-		protected Throttler $throttler,
+		protected IThrottler $throttler,
 	) {
 		parent::__construct();
 	}
 
-	protected function configure() {
+	protected function configure(): void {
 		$this
 			->setName('security:bruteforce:reset')
-			->setDescription('resets bruteforce attemps for given IP address')
+			->setDescription('resets bruteforce attempts for given IP address')
 			->addArgument(
 				'ipaddress',
 				InputArgument::REQUIRED,

core/js/setupchecks.js

@@ -215,6 +215,14 @@
 							type: OC.SetupChecks.MESSAGE_TYPE_INFO
 						});
 					}
+					if (data.isBruteforceThrottled) {
+						messages.push({
+							msg: t('core', 'Your remote address was identified as "{remoteAddress}" and is bruteforce throttled at the moment slowing down the performance of various requests. If the remote address is not your address this can be an indication that a proxy is not configured correctly. Further information can be found in the {linkstart}documentation ↗{linkend}.', { remoteAddress: data.bruteforceRemoteAddress })
+								.replace('{linkstart}', '<a target="_blank" rel="noreferrer noopener" class="external" href="' + data.reverseProxyDocs + '">')
+								.replace('{linkend}', '</a>'),
+							type: OC.SetupChecks.MESSAGE_TYPE_ERROR
+						});
+					}
 					if(!data.hasWorkingFileLocking) {
 						messages.push({
 							msg: t('core', 'Transactional file locking is disabled, this might lead to issues with race conditions. Enable "filelocking.enabled" in config.php to avoid these problems. See the {linkstart}documentation ↗{linkend} for more information.')

core/js/tests/specs/setupchecksSpec.js

@@ -814,6 +814,67 @@ describe('OC.SetupChecks tests', function() {
 			});
 		});
 
+		it('should return an error if the admin IP is bruteforce throttled', function(done) {
+			var async = OC.SetupChecks.checkSetup();
+
+			suite.server.requests[0].respond(
+				200,
+				{
+					'Content-Type': 'application/json',
+				},
+				JSON.stringify({
+					hasFileinfoInstalled: true,
+					isGetenvServerWorking: true,
+					isReadOnlyConfig: false,
+					wasEmailTestSuccessful: true,
+					hasWorkingFileLocking: true,
+					hasDBFileLocking: false,
+					hasValidTransactionIsolationLevel: true,
+					suggestedOverwriteCliURL: '',
+					isRandomnessSecure: true,
+					isFairUseOfFreePushService: true,
+					isBruteforceThrottled: true,
+					bruteforceRemoteAddress: '::1',
+					serverHasInternetConnectionProblems: false,
+					isMemcacheConfigured: true,
+					forwardedForHeadersWorking: true,
+					reverseProxyDocs: 'https://docs.nextcloud.com/foo/bar.html',
+					isCorrectMemcachedPHPModuleInstalled: true,
+					hasPassedCodeIntegrityCheck: true,
+					OpcacheSetupRecommendations: [],
+					isSettimelimitAvailable: true,
+					hasFreeTypeSupport: true,
+					missingIndexes: [],
+					missingPrimaryKeys: [],
+					missingColumns: [],
+					cronErrors: [],
+					cronInfo: {
+						diffInSeconds: 0
+					},
+					isMemoryLimitSufficient: true,
+					appDirsWithDifferentOwner: [],
+					isImagickEnabled: true,
+					areWebauthnExtensionsEnabled: true,
+					is64bit: true,
+					recommendedPHPModules: [],
+					pendingBigIntConversionColumns: [],
+					isMysqlUsedWithoutUTF8MB4: false,
+					isDefaultPhoneRegionSet: true,
+					isEnoughTempSpaceAvailableIfS3PrimaryStorageIsUsed: true,
+					reverseProxyGeneratedURL: 'https://server',
+					temporaryDirectoryWritable: true,
+				})
+			);
+
+			async.done(function( data, s, x ){
+				expect(data).toEqual([{
+					msg: 'Your remote address was identified as "::1" and is bruteforce throttled at the moment slowing down the performance of various requests. If the remote address is not your address this can be an indication that a proxy is not configured correctly. Further information can be found in the <a target="_blank" rel="noreferrer noopener" class="external" href="https://docs.nextcloud.com/foo/bar.html">documentation ↗</a>.',
+					type: OC.SetupChecks.MESSAGE_TYPE_ERROR
+				}]);
+				done();
+			});
+		});
+
 		it('should return an error if set_time_limit is unavailable', function(done) {
 			var async = OC.SetupChecks.checkSetup();
 

core/register_command.php

@@ -209,7 +209,8 @@
 	$application->add(new OC\Core\Command\Security\ListCertificates(\OC::$server->getCertificateManager(), \OC::$server->getL10N('core')));
 	$application->add(new OC\Core\Command\Security\ImportCertificate(\OC::$server->getCertificateManager()));
 	$application->add(new OC\Core\Command\Security\RemoveCertificate(\OC::$server->getCertificateManager()));
-	$application->add(new OC\Core\Command\Security\ResetBruteforceAttempts(\OC::$server->getBruteForceThrottler()));
+	$application->add(\OC::$server->get(\OC\Core\Command\Security\BruteforceAttempts::class));
+	$application->add(\OC::$server->get(\OC\Core\Command\Security\BruteforceResetAttempts::class));
 } else {
 	$application->add(\OC::$server->get(\OC\Core\Command\Maintenance\Install::class));
 }

lib/composer/composer/autoload_classmap.php

@@ -1021,10 +1021,11 @@
     'OC\\Core\\Command\\Preview\\Generate' => $baseDir . '/core/Command/Preview/Generate.php',
     'OC\\Core\\Command\\Preview\\Repair' => $baseDir . '/core/Command/Preview/Repair.php',
     'OC\\Core\\Command\\Preview\\ResetRenderedTexts' => $baseDir . '/core/Command/Preview/ResetRenderedTexts.php',
+    'OC\\Core\\Command\\Security\\BruteforceAttempts' => $baseDir . '/core/Command/Security/BruteforceAttempts.php',
+    'OC\\Core\\Command\\Security\\BruteforceResetAttempts' => $baseDir . '/core/Command/Security/BruteforceResetAttempts.php',
     'OC\\Core\\Command\\Security\\ImportCertificate' => $baseDir . '/core/Command/Security/ImportCertificate.php',
     'OC\\Core\\Command\\Security\\ListCertificates' => $baseDir . '/core/Command/Security/ListCertificates.php',
     'OC\\Core\\Command\\Security\\RemoveCertificate' => $baseDir . '/core/Command/Security/RemoveCertificate.php',
-    'OC\\Core\\Command\\Security\\ResetBruteforceAttempts' => $baseDir . '/core/Command/Security/ResetBruteforceAttempts.php',
     'OC\\Core\\Command\\Status' => $baseDir . '/core/Command/Status.php',
     'OC\\Core\\Command\\SystemTag\\Add' => $baseDir . '/core/Command/SystemTag/Add.php',
     'OC\\Core\\Command\\SystemTag\\Delete' => $baseDir . '/core/Command/SystemTag/Delete.php',
@@ -1584,6 +1585,9 @@
     'OC\\Search\\Result\\Image' => $baseDir . '/lib/private/Search/Result/Image.php',
     'OC\\Search\\SearchComposer' => $baseDir . '/lib/private/Search/SearchComposer.php',
     'OC\\Search\\SearchQuery' => $baseDir . '/lib/private/Search/SearchQuery.php',
+    'OC\\Security\\Bruteforce\\Backend\\DatabaseBackend' => $baseDir . '/lib/private/Security/Bruteforce/Backend/DatabaseBackend.php',
+    'OC\\Security\\Bruteforce\\Backend\\IBackend' => $baseDir . '/lib/private/Security/Bruteforce/Backend/IBackend.php',
+    'OC\\Security\\Bruteforce\\Backend\\MemoryCacheBackend' => $baseDir . '/lib/private/Security/Bruteforce/Backend/MemoryCacheBackend.php',
     'OC\\Security\\Bruteforce\\Capabilities' => $baseDir . '/lib/private/Security/Bruteforce/Capabilities.php',
     'OC\\Security\\Bruteforce\\CleanupJob' => $baseDir . '/lib/private/Security/Bruteforce/CleanupJob.php',
     'OC\\Security\\Bruteforce\\Throttler' => $baseDir . '/lib/private/Security/Bruteforce/Throttler.php',

lib/composer/composer/autoload_static.php

@@ -1054,10 +1054,11 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\Core\\Command\\Preview\\Generate' => __DIR__ . '/../../..' . '/core/Command/Preview/Generate.php',
         'OC\\Core\\Command\\Preview\\Repair' => __DIR__ . '/../../..' . '/core/Command/Preview/Repair.php',
         'OC\\Core\\Command\\Preview\\ResetRenderedTexts' => __DIR__ . '/../../..' . '/core/Command/Preview/ResetRenderedTexts.php',
+        'OC\\Core\\Command\\Security\\BruteforceAttempts' => __DIR__ . '/../../..' . '/core/Command/Security/BruteforceAttempts.php',
+        'OC\\Core\\Command\\Security\\BruteforceResetAttempts' => __DIR__ . '/../../..' . '/core/Command/Security/BruteforceResetAttempts.php',
         'OC\\Core\\Command\\Security\\ImportCertificate' => __DIR__ . '/../../..' . '/core/Command/Security/ImportCertificate.php',
         'OC\\Core\\Command\\Security\\ListCertificates' => __DIR__ . '/../../..' . '/core/Command/Security/ListCertificates.php',
         'OC\\Core\\Command\\Security\\RemoveCertificate' => __DIR__ . '/../../..' . '/core/Command/Security/RemoveCertificate.php',
-        'OC\\Core\\Command\\Security\\ResetBruteforceAttempts' => __DIR__ . '/../../..' . '/core/Command/Security/ResetBruteforceAttempts.php',
         'OC\\Core\\Command\\Status' => __DIR__ . '/../../..' . '/core/Command/Status.php',
         'OC\\Core\\Command\\SystemTag\\Add' => __DIR__ . '/../../..' . '/core/Command/SystemTag/Add.php',
         'OC\\Core\\Command\\SystemTag\\Delete' => __DIR__ . '/../../..' . '/core/Command/SystemTag/Delete.php',
@@ -1617,6 +1618,9 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\Search\\Result\\Image' => __DIR__ . '/../../..' . '/lib/private/Search/Result/Image.php',
         'OC\\Search\\SearchComposer' => __DIR__ . '/../../..' . '/lib/private/Search/SearchComposer.php',
         'OC\\Search\\SearchQuery' => __DIR__ . '/../../..' . '/lib/private/Search/SearchQuery.php',
+        'OC\\Security\\Bruteforce\\Backend\\DatabaseBackend' => __DIR__ . '/../../..' . '/lib/private/Security/Bruteforce/Backend/DatabaseBackend.php',
+        'OC\\Security\\Bruteforce\\Backend\\IBackend' => __DIR__ . '/../../..' . '/lib/private/Security/Bruteforce/Backend/IBackend.php',
+        'OC\\Security\\Bruteforce\\Backend\\MemoryCacheBackend' => __DIR__ . '/../../..' . '/lib/private/Security/Bruteforce/Backend/MemoryCacheBackend.php',
         'OC\\Security\\Bruteforce\\Capabilities' => __DIR__ . '/../../..' . '/lib/private/Security/Bruteforce/Capabilities.php',
         'OC\\Security\\Bruteforce\\CleanupJob' => __DIR__ . '/../../..' . '/lib/private/Security/Bruteforce/CleanupJob.php',
         'OC\\Security\\Bruteforce\\Throttler' => __DIR__ . '/../../..' . '/lib/private/Security/Bruteforce/Throttler.php',