Falhas do tipo CWE-770

2.186 resultados

Alocação de recursos sem limite (negação de serviço por esgotamento)

A aplicação aloca recursos (memória, conexões, arquivos, threads) a pedido de um usuário sem impor limites, permitindo que um atacante esgote todos os recursos disponíveis e derrube o serviço. É basicamente deixar a porta aberta para qualquer um encher a caixa d'água até transbordar.

Exemplo

Um servidor web que cria uma nova thread para cada requisição HTTP recebida, sem limite. Um atacante envia milhares de requisições simultâneas e esgota o pool de threads, tornando o servidor inresponsivo para usuários legítimos — é negação de serviço puro.

Como mitigar

Implemente limites rigorosos: rate limiting (requisições por IP/usuário), quotas de recursos, pool de threads/conexões com tamanho máximo, timeout em operações, e monitoramento de consumo. Valide tamanhos de entrada e rejeite alocações que excedam os limites configurados.

CVE-2021-34741HIGHCisco Email Security Appliance Denial of Service VulnerabilityEPSS 1.3%CVE-2021-29511MEDIUMMemory over-allocation in evm crateEPSS 1.3%CVE-2024-27268MEDIUMIBM WebSphere Application Server Liberty denial of serviceEPSS 1.3%CVE-2024-56374MEDIUMAn issue was discovered in Django 5.1 before 5.1.5, 5.0 before 5.0.11, and 4.2 before 4.2.18. Lack of upper-bound limit enforcement in strinEPSS 1.3%CVE-2017-2587LOWA memory allocation vulnerability was found in netpbm before 10.61. A maliciously crafted SVG file could cause the application to crash.EPSS 1.3%CVE-2025-21490MEDIUMVulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.40 and prior, 8EPSS 1.3%CVE-2026-70133HIGHWindows SMB Server Denial of Service VulnerabilityEPSS 1.3%CVE-2025-21504MEDIUMVulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.39 aEPSS 1.3%CVE-2022-20757HIGHCisco Firepower Threat Defense Software Denial of Service VulnerabilityEPSS 1.3%CVE-2023-0121MEDIUMAllocation of Resources Without Limits or Throttling in GitLabEPSS 1.2%CVE-2026-26018HIGHCoreDNS Loop Detection Denial of Service VulnerabilityEPSS 1.2%CVE-2023-6563HIGHKeycloak: offline session token dosEPSS 1.2%CVE-2026-70072MEDIUMWindows Netlogon Denial of Service VulnerabilityEPSS 1.2%CVE-2023-29779HIGHSengled Dimmer Switch V0.0.9 contains a denial of service (DOS) vulnerability, which allows a remote attacker to send malicious Zigbee messaEPSS 1.2%CVE-2026-70181HIGHASP.NET Core Denial of Service VulnerabilityEPSS 1.2%CVE-2026-70159HIGHASP.NET Core Denial of Service VulnerabilityEPSS 1.2%CVE-2026-70163HIGHMicrosoft OpenSSH for Windows Denial of Service VulnerabilityEPSS 1.2%CVE-2026-83645HIGHActive Directory Federation Services (AD FS) Denial of Service VulnerabilityEPSS 1.2%CVE-2021-34568HIGHWAGO I/O-Check Service prone to Allocation of Resources Without Limits or ThrottlingEPSS 1.2%CVE-2023-43642HIGHMissing upper bound check on chunk length in snappy-java EPSS 1.2%