Falhas do tipo CWE-787
5.843 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-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-2021-34314—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-2021-34319—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-2021-34297—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-2021-34311—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-2021-34295—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-2021-34316—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-2021-34309—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-2021-34293—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-2021-34300—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-2021-1504HIGHCisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service VulnerabilitiesEPSS 1.7%CVE-2021-1445HIGHCisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service VulnerabilitiesEPSS 1.7%CVE-2020-7552—A CWE-787: Out-of-bounds Write vulnerability exists in IGSS Definition (Def.exe) version 14.0.0.20247, that could cause Remote Code ExecutioEPSS 1.7%CVE-2023-4354HIGHHeap buffer overflow in Skia in Google Chrome prior to 116.0.5845.96 allowed a remote attacker who had compromised the renderer process to pEPSS 1.7%CVE-2020-7551—A CWE-787: Out-of-bounds Write vulnerability exists in IGSS Definition (Def.exe) version 14.0.0.20247, that could cause Remote Code ExecutioEPSS 1.7%CVE-2018-20248—In Foxit Quick PDF Library (all versions prior to 16.12), issue where loading a malformed or malicious PDF containing invalid xref table poiEPSS 1.7%CVE-2022-32798HIGHAn out-of-bounds write issue was addressed with improved input validation. This issue is fixed in macOS Monterey 12.5. An app may be able toEPSS 1.6%CVE-2023-2855MEDIUMCandump log parser crash in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via crafted capture fileEPSS 1.6%