Fallos del tipo CWE-208

161 resultados

Discrepância de Tempo Observável

A fraqueza ocorre quando o tempo de execução de uma operação sensível (como validação de senha, verificação de token ou decisão criptográfica) varia dependendo do resultado, permitindo um atacante inferir informações pela duração da resposta. Diferenças de milissegundos podem revelar se um palpite estava correto.

Ejemplo

Um sistema valida senha comparando string por string: se o primeiro caractere estiver errado, retorna erro imediatamente; se estiver certo, continua comparando o segundo. Um atacante mede o tempo de resposta e deduz o padrão correto caractere por caractere, sem precisar da senha correta.

Cómo mitigar

Use funções de comparação constante (ex: `crypto.timingSafeEqual()` em Node.js ou `hmac_equals()` em PHP) que levam o mesmo tempo independente do ponto de falha. Para operações complexas, adicione delays aleatórios ou processe sempre a operação completa antes de retornar resultado.

CVE-2019-9494—The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side-channel attacksEPSS 3.9%CVE-2019-16782MEDIUMPossible Information Leak / Session Hijack Vulnerability in RackEPSS 3.7%CVE-2025-53940HIGHQuiet uses insecure, inconsistent verification on local backend tokenEPSS 2.6%CVE-2020-1926—Timing attack in Cookie signature verificationEPSS 2.5%CVE-2021-43298—The code that performs password matching when using 'Basic' HTTP authentication does not use a constant-time memcmp and has no rate-limitingEPSS 2.3%CVE-2024-29995HIGHWindows Kerberos Elevation of Privilege VulnerabilityEPSS 1.5%CVE-2022-31142HIGHPotential Timing Attack Vector in @fastify/bearer-authEPSS 1.4%CVE-2016-10535—csrf-lite is a cross-site request forgery protection library for framework-less node sites. csrf-lite uses `===`, a fail first string comparEPSS 1.3%CVE-2023-5981MEDIUMGnutls: timing side-channel in the rsa-psk authenticationEPSS 1.3%CVE-2026-47783HIGHIn memcached before 1.6.42, username data for SASL password database authentication has a timing side channel because a loop exits as soon aEPSS 1.3%CVE-2019-13420—Search Guard versions before 21.0 had an timing side channel issue when using the internal user database.EPSS 1.2%CVE-2024-23953MEDIUMApache Hive: Timing Attack Against Signature in LLAP utilEPSS 1.2%CVE-2026-3337HIGHTiming Side-Channel in AES-CCM Tag Verification in AWS-LCEPSS 1.1%CVE-2023-41313CRITICALApache Doris: Timing Attack weaknessEPSS 1.0%CVE-2020-15237MEDIUMTiming attack in ShrineEPSS 1.0%CVE-2022-20752MEDIUMCisco Unified Communications Products Timing Attack VulnerabilityEPSS 1.0%CVE-2024-23342HIGHpython-ecdsa vulnerable to Minerva attack on P-256EPSS 1.0%CVE-2024-39329MEDIUMAn issue was discovered in Django 5.0 before 5.0.7 and 4.2 before 4.2.14. The django.contrib.auth.backends.ModelBackend.authenticate() methoEPSS 0.9%CVE-2010-10006LOWmichaelliao jopenid OpenIdManager.java getAuthentication timing discrepancyEPSS 0.9%CVE-2025-59432MEDIUMTiming Attack Vulnerability in SCRAM AuthenticationEPSS 0.9%