Fallos del tipo CWE-787
5127 resultadosEscrita fora dos limites de memória
Ocorre quando um programa escreve dados em uma posição de memória fora do intervalo alocado para um buffer, array ou estrutura. O atacante aproveita para sobrescrever dados adjacentes (variáveis, ponteiros, pilha de retorno), alterando o comportamento da aplicação ou assumindo controle total do sistema.
Ejemplo
Um programa lê 256 bytes de entrada do usuário e copia para um buffer de 64 bytes sem validação. O atacante envia 300 bytes, que transbordam o buffer e sobrescrevem o endereço de retorno na pilha, permitindo execução de código arbitrário.
Cómo mitigar
Sempre validar tamanho de entrada contra o limite do buffer antes de copiar (usar strncpy, snprintf em vez de strcpy, sprintf). Em linguagens modernas, usar estruturas bounds-checked (Rust, C# arrays) ou linters que detectem padrões perigosos.
CVE-2023-28206HIGHAn out-of-bounds write issue was addressed with improved input validation. This issue is fixed in macOS Monterey 12.6.5, iOS 16.4.1 and iPadEPSS 23.0%KEVCVE-2023-32435HIGHA memory corruption issue was addressed with improved state management. This issue is fixed in macOS Ventura 13.3, Safari 16.4, iOS 16.4 andEPSS 23.0%KEVCVE-2024-29943CRITICALAn attacker was able to perform an out-of-bounds read or write on a JavaScript object by fooling range-based bounds check elimination. This EPSS 22.9%CVE-2023-26497HIGHAn issue was discovered in Samsung Baseband Modem Chipset for Exynos Modem 5123, Exynos Modem 5300, Exynos 980, Exynos 1080, and Exynos AutoEPSS 22.6%CVE-2024-37079CRITICALvCenter Server contains a heap-overflow vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access toEPSS 22.4%KEVCVE-2020-27930HIGHA memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9EPSS 22.0%KEVCVE-2025-43300CRITICALAn out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 aEPSS 22.0%KEVCVE-2024-0517HIGHOut of bounds write in V8 in Google Chrome prior to 120.0.6099.224 allowed a remote attacker to potentially exploit heap corruption via a crEPSS 21.7%CVE-2020-10828CRITICALA stack-based buffer overflow in cvmd on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieveEPSS 20.9%CVE-2020-10827CRITICALA stack-based buffer overflow in apmd on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieveEPSS 20.9%CVE-2021-21148HIGHHeap buffer overflow in V8 in Google Chrome prior to 88.0.4324.150 allowed a remote attacker to potentially exploit heap corruption via a crEPSS 20.0%KEVCVE-2024-21591CRITICALJunos OS: SRX Series and EX Series: Security Vulnerability in J-web allows a preAuth Remote Code ExecutionEPSS 17.7%CVE-2020-24436HIGHAcrobat Pro DC PDF Export Out-Of-Bounds Write Vulnerability Could Lead to Arbitrary Code ExecutionEPSS 17.0%CVE-2023-25234CRITICALTenda AC500 V2.0.1.9(1307) is vulnerable to Buffer Overflow in function fromAddressNat via parameters entrys and mitInterface.EPSS 16.6%CVE-2023-43641HIGHlibcue vulnerable to out-of-bounds array accessEPSS 16.6%CVE-2021-32626HIGHLua scripts can overflow the heap-based Lua stack in RedisEPSS 16.2%CVE-2020-3837HIGHA memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 1EPSS 16.1%KEVCVE-2023-26976HIGHTenda AC6 v15.03.05.09_multi was discovered to contain a stack overflow via the ssid parameter in the form_fast_setting_wifi_set function.EPSS 15.9%CVE-2020-0986HIGHAn elevation of privilege vulnerability exists when the Windows kernel fails to properly handle objects in memory, aka 'Windows Kernel ElevaEPSS 15.9%KEVCVE-2019-7286HIGHA memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 12.1.4, macOS Mojave 10.14.3 SupplementalEPSS 15.6%KEV