Falhas do tipo CWE-303

109 resultados

Implementação incorreta de algoritmos de autenticação

Fraqueza que ocorre quando um desenvolvedor implementa mal um algoritmo de autenticação, introduzindo falhas lógicas que permitem bypass ou acesso não autorizado. Pode envolver erros na validação de credenciais, tratamento incorreto de tokens, criptografia fraca ou fluxos de autenticação vulneráveis.

Exemplo

Um sistema verifica se a senha está correta comparando strings sem usar funções de comparação seguras (timing-safe), permitindo ataques de timing onde o atacante infere a senha byte a byte observando diferenças no tempo de resposta. Ou ainda, um JWT validado apenas na estrutura, mas sem verificar a assinatura corretamente.

Como mitigar

Use bibliotecas criptográficas estabelecidas e auditadas em vez de implementar algoritmos manualmente. Faça code review rigoroso de qualquer código de autenticação, aplique testes de segurança específicos e valide contra padrões reconhecidos (OWASP, NIST) antes de ir para produção.

CVE-2024-10127CRITICALSupport for authentication bypass condition in M-Files LDAP authenticationEPSS 0.6%CVE-2024-5658MEDIUMCraftCMS Plugin - Two-Factor Authentication - TOTP Token Stays Valid After UseEPSS 0.6%CVE-2022-43635MEDIUMThis vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of TP-Link TL-WR940N 6_2111EPSS 0.6%CVE-2024-32879MEDIUMsocial-auth-app-django Improper Handling of Case Sensitivity vulnerabilityEPSS 0.6%CVE-2023-25957CRITICALA vulnerability has been identified in Mendix SAML (Mendix 7 compatible) (All versions >= V1.16.4 < V1.17.3), Mendix SAML (Mendix 8 compatibEPSS 0.6%CVE-2024-3046HIGHIn Eclipse Kura LogServlet component included in versions 5.0.0 to 5.4.1, a specifically crafted request to the servlet can allow an unautheEPSS 0.6%CVE-2024-35190MEDIUMAsterisk' res_pjsip_endpoint_identifier_ip: wrongly matches ALL unauthorized SIP requestsEPSS 0.6%CVE-2025-63210CRITICALThe Newtec Celox UHD (models: CELOXA504, CELOXA820) running firmware version celox-21.6.13 is vulnerable to an authentication bypass. An attEPSS 0.5%CVE-2022-4861MEDIUMIncorrect Implementation of Authentication AlgorithmEPSS 0.5%CVE-2026-3869CRITICALCWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and EPSS 0.5%CVE-2023-39953MEDIUMIssuer not verified from obtained token in user_oidcEPSS 0.5%CVE-2026-0073HIGHIn adbd_tls_verify_cert of auth.cpp, there is a possible bypass of wireless ADB mutual authentication due to a logic error in the code. ThisEPSS 0.5%CVE-2026-47300HIGHASP.NET Core Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2026-41053HIGHOver-inclusive team membership expansion in GitHub App authentication provider for RancherEPSS 0.5%CVE-2023-31211HIGHDisabled automation users could still authenticateEPSS 0.5%CVE-2026-35579HIGHCoreDNS TSIG authentication bypass on gRPC, QUIC, DoH, and DoH3 transportsEPSS 0.5%CVE-2026-11430MEDIUMGrav CMS Scheduler Webhook Authentication Bypass via Null Short-CircuitEPSS 0.5%CVE-2026-43640HIGHBitwarden Server < 2026.4.1 Authentication Bypass via SCIM API KeyEPSS 0.5%CVE-2026-46595CRITICALInvoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/sshEPSS 0.5%CVE-2024-25157MEDIUMAuthentication bypass in GoAnywhere MFT prior to 7.6.0EPSS 0.5%