Falhas do tipo CWE-121

3.820 resultados

Estouro 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-2021-1333HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1159HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1334HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1332HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1195HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1339HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1335HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1186HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1319HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1331HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-43983HIGHWECON LeviStudioUEPSS 2.7%CVE-2018-10494—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. User interactioEPSS 2.7%CVE-2019-5038HIGHAn exploitable command execution vulnerability exists in the print-tlv command of Weave tool. A specially crafted weave TLV can trigger a stEPSS 2.7%CVE-2023-27404HIGHA vulnerability has been identified in Tecnomatix Plant Simulation (All versions < V2201.0006). The affected application is vulnerable to stEPSS 2.7%CVE-2021-35474—Dynamic stack buffer overflow in cachekey pluginEPSS 2.7%CVE-2026-2910HIGHTenda HG9 formPing6 stack-based overflowEPSS 2.7%CVE-2014-0766—Advantech WebAccess Stack-based Buffer OverflowEPSS 2.7%CVE-2014-0764—Advantech WebAccess Stack-based Buffer OverflowEPSS 2.7%CVE-2014-0765—Advantech WebAccess Stack-based Buffer OverflowEPSS 2.7%CVE-2014-0767—Advantech WebAccess Stack-based Buffer OverflowEPSS 2.7%