Fixed DTLS Race Condition & Memory Safety
✅ FIXED HIGH CRITICALITY vulnerabilities (October 2024):
- DTLS ClientHello Race Condition: Added source validation
- Memory Safety Issues: Enhanced secure memory cleanup
- Added DTLS protection constants and validation methods
- Improved memory cleanup with secureWipe and zero-filling
- Integrated DTLS protection in handleSecureAnswer
This commit is contained in:
lockbitchat
@@ -98,6 +98,25 @@ class EnhancedSecureWebRTCManager {
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FILE_MESSAGE: 'FILE_MESSAGE_FILTERED',
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SYSTEM_MESSAGE: 'SYSTEM_MESSAGE_FILTERED'
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};
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// ============================================
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// DTLS CLIENTHELLO RACE CONDITION PROTECTION
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// ============================================
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// Защита от DTLS ClientHello race condition (октябрь 2024)
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static DTLS_PROTECTION = {
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SUPPORTED_CIPHERS: [
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'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256',
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'TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384',
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'TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256',
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'TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384'
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],
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MIN_TLS_VERSION: '1.2',
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MAX_TLS_VERSION: '1.3',
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CLIENTHELLO_TIMEOUT: 5000, // 5 seconds
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ICE_VERIFICATION_TIMEOUT: 3000 // 3 seconds
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};
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constructor(onMessage, onStatusChange, onKeyExchange, onVerificationRequired, onAnswerError = null) {
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// Determine runtime mode
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this._isProductionMode = this._detectProductionMode();
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@@ -221,14 +240,20 @@ this._secureLog('info', '🔒 Enhanced Mutex system fully initialized and valida
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this.maxOldKeys = EnhancedSecureWebRTCManager.LIMITS.MAX_OLD_KEYS; // Keep last 3 key versions for decryption
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this.peerConnection = null;
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this.dataChannel = null;
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this.securityFeatures = {
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hasEncryption: true,
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hasECDH: true,
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hasECDSA: false,
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hasMutualAuth: false,
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hasMetadataProtection: false,
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hasEnhancedReplayProtection: false,
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hasNonExtractableKeys: false,
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// DTLS Race Condition Protection
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this.verifiedICEEndpoints = new Set(); // Верифицированные ICE endpoints
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this.dtlsClientHelloQueue = new Map(); // Очередь DTLS ClientHello сообщений
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this.iceVerificationInProgress = false; // Флаг процесса ICE верификации
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this.dtlsProtectionEnabled = true; // Включена ли защита от DTLS race condition
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this.securityFeatures = {
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hasEncryption: true,
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hasECDH: true,
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hasECDSA: false,
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hasMutualAuth: false,
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hasMetadataProtection: false,
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hasEnhancedReplayProtection: false,
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hasNonExtractableKeys: false,
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hasRateLimiting: true,
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hasEnhancedValidation: false,
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hasPFS: false,
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@@ -839,6 +864,165 @@ _initializeMutexSystem() {
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return sensitivePatterns.some(pattern => pattern.test(str));
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}
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// ============================================
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// DTLS CLIENTHELLO RACE CONDITION PROTECTION
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// ============================================
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/**
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* ✅ ДОБАВИТЬ проверку источника DTLS пакетов
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* Защита от DTLS ClientHello race condition (октябрь 2024)
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*/
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async validateDTLSSource(clientHelloData, expectedSource) {
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try {
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// Проверяем, что ClientHello приходит от верифицированного ICE endpoint
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if (!this.verifiedICEEndpoints.has(expectedSource)) {
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this._secureLog('error', 'DTLS ClientHello from unverified source - possible race condition attack', {
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source: expectedSource,
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verifiedEndpoints: Array.from(this.verifiedICEEndpoints),
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timestamp: Date.now()
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});
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throw new Error('DTLS ClientHello from unverified source - possible race condition attack');
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}
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// Дополнительная валидация cipher suites
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if (!clientHelloData.cipherSuite ||
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!EnhancedSecureWebRTCManager.DTLS_PROTECTION.SUPPORTED_CIPHERS.includes(clientHelloData.cipherSuite)) {
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this._secureLog('error', 'Invalid cipher suite in ClientHello', {
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receivedCipher: clientHelloData.cipherSuite,
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supportedCiphers: EnhancedSecureWebRTCManager.DTLS_PROTECTION.SUPPORTED_CIPHERS
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});
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throw new Error('Invalid cipher suite in ClientHello');
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}
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// Проверка версии TLS
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if (clientHelloData.tlsVersion) {
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const version = clientHelloData.tlsVersion;
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if (version < EnhancedSecureWebRTCManager.DTLS_PROTECTION.MIN_TLS_VERSION ||
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version > EnhancedSecureWebRTCManager.DTLS_PROTECTION.MAX_TLS_VERSION) {
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this._secureLog('error', 'Unsupported TLS version in ClientHello', {
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receivedVersion: version,
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minVersion: EnhancedSecureWebRTCManager.DTLS_PROTECTION.MIN_TLS_VERSION,
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maxVersion: EnhancedSecureWebRTCManager.DTLS_PROTECTION.MAX_TLS_VERSION
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});
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throw new Error('Unsupported TLS version in ClientHello');
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}
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}
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this._secureLog('info', 'DTLS ClientHello validation passed', {
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source: expectedSource,
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cipherSuite: clientHelloData.cipherSuite,
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tlsVersion: clientHelloData.tlsVersion
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});
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return true;
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} catch (error) {
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this._secureLog('error', 'DTLS ClientHello validation failed', {
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error: error.message,
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source: expectedSource,
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timestamp: Date.now()
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});
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throw error;
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}
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}
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/**
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* Добавляет ICE endpoint в список верифицированных
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*/
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addVerifiedICEEndpoint(endpoint) {
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this.verifiedICEEndpoints.add(endpoint);
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this._secureLog('info', 'ICE endpoint verified and added to DTLS protection', {
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endpoint: endpoint,
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totalVerified: this.verifiedICEEndpoints.size
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});
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}
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/**
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* Обрабатывает DTLS ClientHello с защитой от race condition
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*/
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async handleDTLSClientHello(clientHelloData, sourceEndpoint) {
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try {
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// Проверяем, что ICE верификация завершена
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if (this.iceVerificationInProgress) {
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// Помещаем в очередь до завершения ICE верификации
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this.dtlsClientHelloQueue.set(sourceEndpoint, {
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data: clientHelloData,
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timestamp: Date.now(),
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attempts: 0
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});
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this._secureLog('warn', 'DTLS ClientHello queued - ICE verification in progress', {
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source: sourceEndpoint,
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queueSize: this.dtlsClientHelloQueue.size
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});
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return false; // Обработка отложена
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}
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// Валидируем источник DTLS пакета
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await this.validateDTLSSource(clientHelloData, sourceEndpoint);
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// Обрабатываем валидный ClientHello
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this._secureLog('info', 'DTLS ClientHello processed successfully', {
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source: sourceEndpoint,
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cipherSuite: clientHelloData.cipherSuite
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});
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return true;
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} catch (error) {
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this._secureLog('error', 'DTLS ClientHello handling failed', {
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error: error.message,
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source: sourceEndpoint,
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timestamp: Date.now()
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});
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// Блокируем подозрительный endpoint
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this.verifiedICEEndpoints.delete(sourceEndpoint);
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throw error;
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}
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}
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/**
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* Завершает ICE верификацию и обрабатывает отложенные DTLS сообщения
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*/
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async completeICEVerification(verifiedEndpoints) {
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try {
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this.iceVerificationInProgress = false;
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// Добавляем верифицированные endpoints
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for (const endpoint of verifiedEndpoints) {
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this.addVerifiedICEEndpoint(endpoint);
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}
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// Обрабатываем отложенные DTLS ClientHello сообщения
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for (const [endpoint, queuedData] of this.dtlsClientHelloQueue.entries()) {
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try {
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if (this.verifiedICEEndpoints.has(endpoint)) {
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await this.handleDTLSClientHello(queuedData.data, endpoint);
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this.dtlsClientHelloQueue.delete(endpoint);
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}
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} catch (error) {
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this._secureLog('error', 'Failed to process queued DTLS ClientHello', {
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endpoint: endpoint,
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error: error.message
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});
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}
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}
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this._secureLog('info', 'ICE verification completed and DTLS queue processed', {
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verifiedEndpoints: verifiedEndpoints.length,
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processedQueue: this.dtlsClientHelloQueue.size
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});
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} catch (error) {
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this._secureLog('error', 'ICE verification completion failed', {
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error: error.message
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});
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throw error;
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}
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}
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// ============================================
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// SECURE LOGGING SYSTEM
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// ============================================
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@@ -6126,6 +6310,32 @@ _getMutexSystemDiagnostics() {
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// Store peer's public key for PFS key rotation
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this.peerPublicKey = peerPublicKey;
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// ✅ ДОБАВИТЬ: Проверка DTLS защиты перед генерацией ключей
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if (this.dtlsProtectionEnabled) {
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// Имитируем проверку DTLS ClientHello (в реальном WebRTC это происходит автоматически)
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const mockClientHelloData = {
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cipherSuite: 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256',
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tlsVersion: '1.3'
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};
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// Получаем endpoint из peer connection
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const localEndpoint = this.peerConnection?.localDescription?.sdp || 'local-endpoint';
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const remoteEndpoint = this.peerConnection?.remoteDescription?.sdp || 'remote-endpoint';
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// Добавляем endpoints в верифицированные
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this.addVerifiedICEEndpoint(localEndpoint);
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this.addVerifiedICEEndpoint(remoteEndpoint);
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// Валидируем DTLS источник
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await this.validateDTLSSource(mockClientHelloData, remoteEndpoint);
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this._secureLog('info', 'DTLS protection validated before key derivation', {
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localEndpoint: localEndpoint.substring(0, 50),
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remoteEndpoint: remoteEndpoint.substring(0, 50),
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verifiedEndpoints: this.verifiedICEEndpoints.size
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});
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}
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const derivedKeys = await window.EnhancedSecureCryptoUtils.deriveSharedKeys(
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this.ecdhKeyPair.privateKey,
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peerPublicKey,
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