Falhas do tipo CWE-122

3.736 resultados

Estouro de heap

Ocorre quando código escreve mais dados do que o espaço alocado em uma região de memória dinâmica (heap), sobrescrevendo dados adjacentes. Um atacante pode explorar isso para corromper estruturas de dados críticas, contornar proteções de segurança ou executar código arbitrário.

Exemplo

Um servidor web aloca 256 bytes para armazenar um nome de usuário, mas copia 512 bytes de uma requisição sem validação. Os 256 bytes extras sobrescrevem ponteiros ou metadados do heap, permitindo execução de código ou negação de serviço.

Como mitigar

Use funções seguras que respeitam limites (strcpy_s, memcpy com tamanho verificado em runtime). Validar e limitar o tamanho de entrada antes de copiar. Ativar proteções como ASLR, stack canaries e ferramentas de sanitização (AddressSanitizer) em desenvolvimento.

CVE-2024-21317HIGHSQL Server Native Client OLE DB Provider Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-21331HIGHSQL Server Native Client OLE DB Provider Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-21425HIGHSQL Server Native Client OLE DB Provider Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-20701HIGHSQL Server Native Client OLE DB Provider Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-11233MEDIUMSingle byte overread with convert.quoted-printable-decode filterEPSS 1.6%CVE-2025-27477HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.6%CVE-2025-21178HIGHVisual Studio Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-38154HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-49085HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-49086HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.6%CVE-2021-21943CRITICALA heap-based buffer overflow vulnerability exists in the XWD parser functionality of Accusoft ImageGear 19.10. A specially-crafted file can EPSS 1.6%CVE-2024-38114HIGHWindows IP Routing Management Snapin Remote Code Execution VulnerabilityEPSS 1.6%CVE-2021-21914CRITICALA heap-based buffer overflow vulnerability exists in the DecoderStream::Append functionality of Accusoft ImageGear 19.10. A specially-crafteEPSS 1.6%CVE-2023-32083MEDIUMMicrosoft Failover Cluster Information Disclosure VulnerabilityEPSS 1.6%CVE-2024-21353HIGHMicrosoft WDAC ODBC Driver Remote Code Execution VulnerabilityEPSS 1.6%CVE-2025-24056HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.6%CVE-2021-3984HIGHHeap-based Buffer Overflow in vim/vimEPSS 1.6%CVE-2026-70242CRITICALMicrosoft Office Outlook Remote Code Execution VulnerabilityEPSS 1.6%CVE-2021-25668—A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X2EPSS 1.6%CVE-2022-0361HIGHHeap-based Buffer Overflow in vim/vimEPSS 1.6%