Fallos del tipo CWE-787
5142 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-2018-3859HIGHAn exploitable out-of-bounds write exists in the TIFF parsing functionality of Canvas Draw version 4.0.0. A specially crafted TIFF image proEPSS 1.8%CVE-2024-25003HIGHKiTTY versions 0.76.1.13 and before is vulnerable to a stack-based buffer overflow via the hostname, occurs due to insufficient bounds checkEPSS 1.8%CVE-2020-1912—An out-of-bounds read/write vulnerability when executing lazily compiled inner generator functions in Facebook Hermes prior to commit 091835EPSS 1.8%CVE-2021-31509HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenText Brava! Desktop 16.6.3.84. User inEPSS 1.8%CVE-2021-31513HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenText Brava! Desktop Build 16.6.4.55. UEPSS 1.8%CVE-2021-31508HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenText Brava! Desktop 16.6.3.84. User inEPSS 1.8%CVE-2021-31514HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenText Brava! Desktop Build 16.6.4.55. UEPSS 1.8%CVE-2021-31511HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenText Brava! Desktop Build 16.6.4.55. UEPSS 1.8%CVE-2024-37377HIGHA heap-based buffer overflow in IPsec of Ivanti Connect Secure before version 22.7R2.3 allows a remote unauthenticated attacker to cause a dEPSS 1.8%CVE-2023-2858MEDIUMNetScaler file 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 1.8%CVE-2023-2856MEDIUMVMS TCPIPtrace file 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 1.8%CVE-2024-25004HIGHKiTTY versions 0.76.1.13 and before is vulnerable to a stack-based buffer overflow via the username, occurs due to insufficient bounds checkEPSS 1.8%CVE-2019-1887HIGHCisco Unified Communications Manager Session Initiation Protocol Denial of Service VulnerabilityEPSS 1.8%CVE-2021-32988—FATEK Automation WinProladder Versions 3.30 and prior are vulnerable to an out-of-bounds write, which may allow an attacker to execute arbitEPSS 1.8%CVE-2020-1894—A stack write overflow in WhatsApp for Android prior to v2.20.35, WhatsApp Business for Android prior to v2.20.20, WhatsApp for iPhone priorEPSS 1.8%CVE-2019-14906HIGHA flaw was found with the RHSA-2019:3950 erratum, where it did not fix the CVE-2019-13616 SDL vulnerability. This issue only affects Red HatEPSS 1.8%CVE-2023-23531HIGHThe issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.2, iOS 16.3 and iPadOS 16.3. An app may be abEPSS 1.8%CVE-2021-3405—A flaw was found in libebml before 1.4.2. A heap overflow bug exists in the implementation of EbmlString::ReadData and EbmlUnicodeString::ReEPSS 1.7%CVE-2021-44013—A vulnerability has been identified in JT2Go (All versions < V13.2.0.5), Teamcenter Visualization (All versions < V13.2.0.5). The DL180pdfl.EPSS 1.7%CVE-2021-34323—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Jt981.dll library EPSS 1.7%