Fallos del tipo CWE-303

121 resultados

Implementação incorreta de algoritmos de autenticação

Ocorre quando o desenvolvedor implementa um algoritmo de autenticação de forma incorreta, desviando do padrão esperado ou cometendo erros lógicos na validação de credenciais. Isso pode permitir que atacantes contornem o mecanismo de autenticação através de entradas malformadas, race conditions ou falhas na comparação de senhas.

Ejemplo

Um sistema que compara senhas usando operadores de igualdade simples (==) em vez de funções timing-safe, permitindo timing attacks. Outro caso: validação de JWT que não verifica assinatura ou aceita algoritmo 'none'. Ou ainda, implementar autenticação multi-fator que deixa um caminho para bypass se a segunda autenticação falhar.

Cómo mitigar

Use bibliotecas de autenticação maduras e bem auditadas (passlib, bcrypt, argon2) em vez de implementar do zero. Aplique testes unitários e de segurança específicos para fluxos de autenticação, incluindo casos de falha. Faça code review focado em algoritmos criptográficos e nunca compare credenciais com == em linguagens tipo Python/Java — use funções timing-safe.

CVE-2025-14273HIGHMattermost Jira plugin user spoofing enables Jira request forgery.EPSS 0.3%CVE-2025-8881MEDIUMInappropriate implementation in File Picker in Google Chrome prior to 139.0.7258.127 allowed a remote attacker who convinced a user to engagEPSS 0.3%CVE-2026-101878HIGHBitwarden Server 2025.6.0 < 2025.6.0 Authentication Bypass via SSO Identifier TruncationEPSS 0.3%CVE-2023-4641MEDIUMShadow-utils: possible password leak during passwd(1) changeEPSS 0.3%CVE-2026-32953MEDIUMTillitis: TKey Client has an Error in Protocol ImplementationEPSS 0.3%CVE-2026-86589MEDIUMApache Answer: User Center integration does not revoke first-login sessions after central account suspensionEPSS 0.3%CVE-2024-34722HIGHIn smp_proc_rand of smp_act.cc, there is a possible authentication bypass during legacy BLE pairing due to incorrect implementation of a proEPSS 0.3%CVE-2025-2475MEDIUMUnauthorized Bot Login Using CredentialsEPSS 0.2%CVE-2025-48994MEDIUMSignXML's signature verification with HMAC is vulnerable to an algorithm confusion attackEPSS 0.2%CVE-2025-3230MEDIUMBypass of System Admin User Deactivation Controls for Personal Access Tokens in Mattermost ServerEPSS 0.2%CVE-2024-36250LOWMFA Code ReplayEPSS 0.2%CVE-2025-2571MEDIUMGoogle OAuth Authentication Bypass for Converted Bot AccountsEPSS 0.2%CVE-2024-52586MEDIUMeLabFTW MFA bypassEPSS 0.2%CVE-2026-0999MEDIUMAuthentication bypass via userID login when email and username login are disabledEPSS 0.2%CVE-2026-109928—Apache OFBiz: Incorrect Authentication Algorithm Implementation in Password Reset Enables Full Account TakeoverEPSS 0.2%CVE-2026-96460MEDIUMKeycloak-services: keycloak-services: indefinite access token renewal via standard token exchange v2EPSS 0.2%CVE-2026-27656MEDIUMAccount Takeover via Substring Matching in OpenID Connect AuthenticationEPSS 0.2%CVE-2026-15688CRITICALPassword Authentication Bypass Vulnerability in GX Works3 and Motion Control SettingEPSS 0.2%CVE-2026-9853HIGHA vulnerability exists in SYS600 which allows any user authenticated to the operating system of the server hosting the application to read aEPSS 0.1%CVE-2026-9854HIGHA vulnerability exists in SYS600 RBAC mechanism where users having access to the engineering tools could elevate their privileges to adminisEPSS 0.1%