Falhas do tipo CWE-121
3.821 resultadosEstouro de buffer na pilha
Ocorre quando código escreve mais dados em um buffer alocado na pilha do que sua capacidade permite, sobrescrevendo dados adjacentes (variáveis, endereços de retorno). Um atacante pode explorar isso para executar código arbitrário ou crashar a aplicação alterando o fluxo de execução.
Exemplo
Uma função C que copia uma string do usuário diretamente em um array local sem validar tamanho: `char buffer[10]; strcpy(buffer, user_input);`. Se user_input tiver 50 caracteres, os 40 extras sobrescrevem a pilha, incluindo potencialmente o endereço de retorno da função.
Como mitigar
Use funções seguras que limitam escrita (strncpy, snprintf em vez de strcpy/sprintf), valide tamanho de entrada antes de copiar, ative proteções do compilador (stack canaries, ASLR) e use ferramentas de análise estática para detectar cópias sem limite.
CVE-2023-23902CRITICALA buffer overflow vulnerability exists in the uhttpd login functionality of Milesight UR32L v32.3.0.5. A specially crafted network request cEPSS 2.2%CVE-2021-36347MEDIUMiDRAC9 versions prior to 5.00.20.00 and iDRAC8 versions prior to 2.82.82.82 contain a stack-based buffer overflow vulnerability. An authentiEPSS 2.2%CVE-2021-27494—Datakit Software libraries CatiaV5_3dRead, CatiaV6_3dRead, Step3dRead, Ug3dReadPsr, Jt3dReadPsr modules in KeyShot Versions v10.1 and prior EPSS 2.2%CVE-2021-1287HIGHCisco Small Business RV132W and RV134W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilityEPSS 2.2%CVE-2018-20655—When receiving calls using WhatsApp for iOS, a missing size check when parsing a sender-provided packet allowed for a stack-based overflow. EPSS 2.2%CVE-2021-1193HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1161HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1164HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1190HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1208HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1163HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1184HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1189HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1202HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1344HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1321HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1169HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1206HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1207HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%CVE-2021-1166HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.2%