Falhas do tipo CWE-122

3.188 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-2023-44429HIGHGStreamer AV1 Codec Parsing Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 2.2%CVE-2025-21369HIGHMicrosoft Digest Authentication Remote Code Execution VulnerabilityEPSS 2.2%CVE-2025-21368HIGHMicrosoft Digest Authentication Remote Code Execution VulnerabilityEPSS 2.2%CVE-2024-38076CRITICALWindows Remote Desktop Licensing Service Remote Code Execution VulnerabilityEPSS 2.2%CVE-2021-29457—Heap buffer overflow in Exiv2::Jp2Image::doWriteMetadataEPSS 2.2%CVE-2021-34326—A vulnerability has been identified in JT2Go (All versions < V13.2), Solid Edge SE2021 (All Versions < SE2021MP5), Teamcenter Visualization EPSS 2.1%CVE-2021-34328—A vulnerability has been identified in JT2Go (All versions < V13.2), Solid Edge SE2021 (All Versions < SE2021MP5), Teamcenter Visualization EPSS 2.1%CVE-2021-34329—A vulnerability has been identified in JT2Go (All versions < V13.2), Solid Edge SE2021 (All Versions < SE2021MP5), Teamcenter Visualization EPSS 2.1%CVE-2021-34905HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2021-34907HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2021-34900HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2021-34896HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2021-34893HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2020-6007—Philips Hue Bridge model 2.X prior to and including version 1935144020 contains a Heap-based Buffer Overflow when handling a long ZCL stringEPSS 2.1%CVE-2021-46603HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT 10.16.0.80. UEPSS 2.1%CVE-2021-46605HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT 10.16.0.80. UEPSS 2.1%CVE-2021-34904HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2019-6539—Several heap-based buffer overflow vulnerabilities in WECON LeviStudioU version 1.8.56 and prior have been identified, which may allow arbitEPSS 2.1%CVE-2026-62741HIGHWindows HTTP.sys Elevation of Privilege VulnerabilityEPSS 2.1%CVE-2026-61930HIGHWindows Kernel Elevation of Privilege VulnerabilityEPSS 2.1%