Weaknesses of type CWE-208

192 results

Discrepância de Tempo Observável

É quando o tempo de execução de uma operação varia dependendo do input (ex: senha, token, chave criptográfica), e essa variação é observável por um atacante. O código "vaza" informação sensível através do timing, permitindo descobrir dados sem acesso direto a eles.

Example

Uma função de validação de senha que compara caractere por caractere e retorna no primeiro erro: comparar 'abc123' (erro rápido no 1º char) vs 'abcdef' (erro mais lento no 5º char) revela ao atacante qual início de senha está correto, possibilitando brute force muito mais eficiente.

How to mitigate

Use comparações de tempo constante (constant-time comparison) para operações sensíveis, independente do resultado: bibliotecas como `hmac.compare()` em Node.js ou `secrets.compare()` em Python. Para autenticação, sempre complete o fluxo de validação antes de retornar qualquer resultado.

CVE-2024-45052MEDIUMFides Webserver Authentication Timing-Based Username Enumeration VulnerabilityEPSS 0.6%CVE-2024-52307MEDIUMauthentik allows a timing attack due to missing constant time comparison for metrics viewEPSS 0.6%CVE-2026-47784HIGHIn memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by saslEPSS 0.5%CVE-2021-21575MEDIUM Dell BSAFE Micro Edition Suite, versions before 4.5.2, contain an Observable Timing Discrepancy Vulnerability. EPSS 0.5%CVE-2025-68621HIGHTrilium Notes has a Timing Attack Vulnerability in /api/login/syncEPSS 0.5%CVE-2024-47178HIGHbasic-auth-connect's callback uses time unsafe string comparisonEPSS 0.5%CVE-2024-7010HIGHTiming Attack in mudler/localaiEPSS 0.5%CVE-2024-2467MEDIUMPerl-crypt-openssl-rsa: side-channel attack in pkcs#1 v1.5 padding mode (marvin attack)EPSS 0.5%CVE-2024-31074HIGHObservable timing discrepancy in some Intel(R) QAT Engine for OpenSSL software before version v1.6.1 may allow information disclosure via neEPSS 0.5%CVE-2024-36405MEDIUMControl-flow timing leak in Kyber reference implementation when compiled with Clang 15-18 for -Os, -O1 and other optionsEPSS 0.5%CVE-2026-70658HIGHpay-rails/pay: non-constant-time HMAC comparison in Paddle Billing webhook signature verifierEPSS 0.5%CVE-2026-6656HIGHCrypt::Password versions through 0.28 for Perl are susceptible to timing attacksEPSS 0.5%CVE-2026-23849MEDIUMFile Browser vulnerable to Username Enumeration via Timing Attack in /api/loginEPSS 0.5%CVE-2026-44255MEDIUMWazuh: Username Enumeration via Timing Side-ChannelEPSS 0.5%CVE-2026-23892MEDIUMOctoPrint has Timing Side-Channel Vulnerability in API Key AuthenticationEPSS 0.5%CVE-2026-54685MEDIUMFileBrowser Quantum has Username Enumeration via Authentication Timing Side-ChannelEPSS 0.5%CVE-2022-42288MEDIUMNVIDIA BMC contains a vulnerability in IPMI handler, where an unauthorized attacker can use certain oracles to guess a valid BMC username, wEPSS 0.5%CVE-2024-45191MEDIUMAn issue was discovered in Matrix libolm through 3.2.16. The AES implementation is vulnerable to cache-timing attacks due to use of S-boxes.EPSS 0.5%CVE-2024-22340MEDIUMIBM Common Cryptographic Architecture information disclosureEPSS 0.4%CVE-2024-3296MEDIUMRust-openssl: timing based side-channel can lead to a bleichenbacher style attackEPSS 0.4%