Fallos del tipo CWE-122

3195 resultados

Estouro de heap

É quando o código escreve dados além dos limites de um buffer alocado no heap (memória dinâmica), sobrescrevendo dados de outras estruturas adjacentes. Esse estouro pode corromper metadados do heap, variáveis vizinhas ou objetos do programa, permitindo execução de código arbitrário ou negação de serviço.

Ejemplo

Um servidor web recebe uma string de tamanho arbitrário e a copia para um buffer de 256 bytes sem validar o comprimento (ex: strcpy em C). Se o atacante enviar 500 bytes, o restante escreve além da zona alocada, corrompendo estruturas próximas e potencialmente ganhando controle do fluxo.

Cómo mitigar

Use funções seguras (strncpy, strlcpy, snprintf em C) que respeitam limites de tamanho; valide e sanitize entrada do usuário antes de copiar; ative proteções do SO (ASLR, DEP/NX); use linguagens de memória segura quando possível; aplique verificações de limites em loops de cópia.

CVE-2023-21787HIGH3D Builder Remote Code Execution VulnerabilityEPSS 0.9%CVE-2024-32621CRITICALHDF5 Library through 1.14.3 contains a heap-based buffer overflow in H5HG_read in H5HG.c (called from H5VL__native_blob_get in H5VLnative_blEPSS 0.9%CVE-2020-7852HIGHDaviewIndy Heap Overflow VulnerabilitiesEPSS 0.9%CVE-2026-72950HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-19874CRITICALKonami's Metal Gear Online 3 contains a heap-based buffer overflowEPSS 0.9%CVE-2022-20946HIGHA vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of Cisco Firepower Threat Defense (FTD) Software couEPSS 0.9%CVE-2023-29344HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-80087MEDIUMMicrosoft Office Information Disclosure VulnerabilityEPSS 0.9%CVE-2022-0631MEDIUMHeap-based Buffer Overflow in mruby/mrubyEPSS 0.9%CVE-2024-0145MEDIUMNVIDIA nvJPEG2000 library contains a vulnerability where an attacker can cause a heap-based buffer overflow issue by means of a specially crEPSS 0.9%CVE-2026-67373HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-56194HIGHWindows NFS Server Elevation of Privilege VulnerabilityEPSS 0.9%CVE-2026-67388HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-68775HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-77481HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-69522HIGH.NET and Visual Studio Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-73012HIGHWindows Management Services Elevation of Privilege VulnerabilityEPSS 0.9%CVE-2026-67384HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-67639HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-69547HIGHWindows DHCP Server Remote Code Execution VulnerabilityEPSS 0.9%