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-2021-33000—Parsing a maliciously crafted project file may cause a heap-based buffer overflow, which may allow an attacker to perform arbitrary code exeEPSS 1.0%CVE-2023-41229HIGHD-Link DIR-3040 HTTP Request Processing Referer Heap-Based Buffer Overflow Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-40033HIGHFreeRDP - Heap-buffer-overflow in gdi_CacheToSurface via rectangle validation bypassEPSS 1.0%CVE-2021-38404HIGHDelta Electronics DOPSoft 2 Heap-based Buffer OverflowEPSS 1.0%CVE-2023-36730HIGHMicrosoft ODBC Driver for SQL Server Remote Code Execution VulnerabilityEPSS 1.0%CVE-2020-13581HIGHIn SoftMaker Software GmbH SoftMaker Office PlanMaker 2021 (Revision 1014), a specially crafted document can cause the document parser to coEPSS 1.0%CVE-2023-33221MEDIUM Heap Buffer Overflow when reading DESFire cardEPSS 1.0%CVE-2025-64678HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-69829CRITICALWindows Shell Remote Code Execution VulnerabilityEPSS 1.0%CVE-2022-3520HIGHHeap-based Buffer Overflow in vim/vimEPSS 1.0%CVE-2020-15205CRITICALData leak in TensorflowEPSS 1.0%CVE-2020-25674—WriteOnePNGImage() from coders/png.c (the PNG coder) has a for loop with an improper exit condition that can allow an out-of-bounds READ viaEPSS 1.0%CVE-2020-25665—The PALM image coder at coders/palm.c makes an improper call to AcquireQuantumMemory() in routine WritePALMImage() because it needs to be ofEPSS 1.0%CVE-2022-23537MEDIUMPJSIP vulnerable to heap buffer overflow when decoding STUN messageEPSS 1.0%CVE-2026-42536HIGHApache HTTP Server: mod_xml2enc heap overflowEPSS 1.0%CVE-2022-4584MEDIUMAxiomatic Bento4 mp42aac heap-based overflowEPSS 1.0%CVE-2021-42018MEDIUMA vulnerability has been identified in RUGGEDCOM i800, RUGGEDCOM i800NC, RUGGEDCOM i801, RUGGEDCOM i801NC, RUGGEDCOM i802, RUGGEDCOM i802NC,EPSS 1.0%CVE-2024-55627MEDIUMSuricata segfault on StreamingBufferSlideToOffsetWithRegionsEPSS 1.0%CVE-2025-21395HIGHMicrosoft Access Remote Code Execution VulnerabilityEPSS 1.0%CVE-2024-8946MEDIUMMicroPython VFS Unmount vfs.c mp_vfs_umount heap-based overflowEPSS 1.0%