Falhas do tipo CWE-787
5.142 resultadosEscrita fora dos limites de memória
Ocorre quando um programa escreve dados em um endereço de memória fora da área alocada para um buffer ou variável. O código não valida o tamanho ou índice antes de gravar, permitindo sobrescrita de dados adjacentes, corrupção de estruturas críticas ou execução de código arbitrário.
Exemplo
Um formulário web que copia dados do usuário para um buffer de 256 bytes sem validar o tamanho da entrada. Se o atacante envia 500 bytes, a escrita transborda e sobrescreve a pilha, podendo hijackear o endereço de retorno da função.
Como mitigar
Use funções seguras de cópia (strncpy, strlcpy ao invés de strcpy; memcpy com tamanho máximo explícito) e sempre valide comprimento e índices antes de escrever. Em linguagens modernas, prefira estruturas com bounds-checking automático (arrays em Java, Rust, etc).
CVE-2024-29133MEDIUMApache Commons Configuration: StackOverflowError calling ListDelimiterHandler.flatten(Object, int) with a cyclical object treeEPSS 1.7%CVE-2021-21046LOWAcrobat Reader DC Buffer Overflow Vulnerability Could Lead To Arbitrary Code ExecutionEPSS 1.7%CVE-2018-14810—WECON Technology Co., Ltd. PI Studio HMI versions 4.1.9 and prior and PI Studio versions 4.2.34 and prior parse files and pass invalidated uEPSS 1.7%CVE-2023-30800HIGHMikroTik RouterOS Web Interface Heap CorruptionEPSS 1.7%CVE-2024-23305CRITICALAn out-of-bounds write vulnerability exists in the BrainVisionMarker Parsing functionality of The Biosig Project libbiosig 2.5.0 and Master EPSS 1.7%CVE-2021-41160MEDIUMImproper region checks in FreeRDP allow out of bound write to memoryEPSS 1.7%CVE-2021-34300—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Tiff_loader.dll liEPSS 1.7%CVE-2021-34331—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Jt981.dll library EPSS 1.7%CVE-2021-34311—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Mono_loader.dll liEPSS 1.7%CVE-2021-34316—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The DL180CoolType.dll EPSS 1.7%CVE-2021-34291—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Gif_loader.dll libEPSS 1.7%CVE-2021-34310—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Tiff_loader.dll liEPSS 1.7%CVE-2021-34297—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The BMP_Loader.dll libEPSS 1.7%CVE-2021-34309—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Tiff_loader.dll liEPSS 1.7%CVE-2021-34314—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The BMP_loader.dll libEPSS 1.7%CVE-2021-34295—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Gif_loader.dll libEPSS 1.7%CVE-2021-34319—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The BMP_loader.dll libEPSS 1.7%CVE-2021-34293—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Gif_loader.dll libEPSS 1.7%CVE-2021-1445HIGHCisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service VulnerabilitiesEPSS 1.7%CVE-2021-1504HIGHCisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service VulnerabilitiesEPSS 1.7%