Falhas do tipo CWE-122

3.189 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-2020-4068MEDIUMHeap-based Buffer Overflow in APNSwiftEPSS 1.3%CVE-2022-1160HIGHheap buffer overflow in get_one_sourceline in vim/vimEPSS 1.3%CVE-2024-30020HIGHWindows Cryptographic Services Remote Code Execution VulnerabilityEPSS 1.3%CVE-2020-25199—A heap-based buffer overflow vulnerability exists within the WECON LeviStudioU Release Build 2019-09-21 and prior when processing project fiEPSS 1.3%CVE-2022-2264HIGHHeap-based Buffer Overflow in vim/vimEPSS 1.3%CVE-2025-33064HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.3%CVE-2026-21248HIGHWindows Hyper-V Remote Code Execution VulnerabilityEPSS 1.3%CVE-2026-21244HIGHWindows Hyper-V Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-24907HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-23406HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-24868HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-24867HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-23403HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-24913HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2025-29967HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 1.3%CVE-2024-3204HIGHc-blosc2 ndlz4x4.c ndlz4_decompress heap-based overflowEPSS 1.3%CVE-2020-28598HIGHAn out-of-bounds write vulnerability exists in the Admesh stl_fix_normal_directions() functionality of Prusa Research PrusaSlicer 2.2.0 and EPSS 1.3%CVE-2025-21273HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.3%CVE-2025-21282HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.3%CVE-2025-21266HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.3%