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-2022-34671HIGHNVIDIA GPU Display Driver for Windows contains a vulnerability in the user-mode layer, where an unprivileged user can cause an out-of-boundsEPSS 1.4%CVE-2022-2210HIGHOut-of-bounds Write in vim/vimEPSS 1.4%CVE-2022-42795HIGHA memory consumption issue was addressed with improved memory handling. This issue is fixed in tvOS 16, iOS 16, macOS Ventura 13, watchOS 9.EPSS 1.4%CVE-2021-41159MEDIUMImproper client input validation for FreeRDP gateway connections allows to overwrite memoryEPSS 1.4%CVE-2020-7524—Out-of-bounds Write vulnerability exists in Modicon M218 Logic Controller (V5.0.0.7 and prior) which could cause Denial of Service when sendEPSS 1.4%CVE-2023-6229CRITICALBuffer overflow in CPCA PDL Resource Download process of Office Multifunction Printers and Laser Printers(*) which may allow an attacker on EPSS 1.4%CVE-2023-6231CRITICALBuffer overflow in WSD probe request process of Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the netwoEPSS 1.4%CVE-2024-0244CRITICALBuffer overflow in CPCA PCFAX number process of Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the netwoEPSS 1.4%CVE-2023-6233CRITICALBuffer overflow in SLP attribute request process of Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the nEPSS 1.4%CVE-2023-6234CRITICALBuffer overflow in CPCA Color LUT Resource Download process of Office Multifunction Printers and Laser Printers(*) which may allow an attackEPSS 1.4%CVE-2022-34275—A vulnerability has been identified in PADS Standard/Plus Viewer (All versions). The affected application contains an out of bounds write paEPSS 1.4%CVE-2022-34274—A vulnerability has been identified in PADS Standard/Plus Viewer (All versions). The affected application contains an out of bounds write paEPSS 1.4%CVE-2022-34273—A vulnerability has been identified in PADS Standard/Plus Viewer (All versions). The affected application contains an out of bounds write paEPSS 1.4%CVE-2022-34276—A vulnerability has been identified in PADS Standard/Plus Viewer (All versions). The affected application contains an out of bounds write paEPSS 1.4%CVE-2022-34289—A vulnerability has been identified in PADS Standard/Plus Viewer (All versions). The affected application contains an out of bounds write paEPSS 1.4%CVE-2022-34284—A vulnerability has been identified in PADS Standard/Plus Viewer (All versions). The affected application contains an out of bounds write paEPSS 1.4%CVE-2022-34286—A vulnerability has been identified in PADS Standard/Plus Viewer (All versions). The affected application contains an out of bounds write paEPSS 1.4%CVE-2017-2580MEDIUMAn out-of-bounds write vulnerability was found in netpbm before 10.61. A maliciously crafted file could cause the application to crash or poEPSS 1.4%CVE-2020-0069HIGHIn the ioctl handlers of the Mediatek Command Queue driver, there is a possible out of bounds write due to insufficient input sanitization aEPSS 1.4%KEVCVE-2025-6021HIGHLibxml2: integer overflow in xmlbuildqname() leads to stack buffer overflow in libxml2EPSS 1.4%