Fallos del tipo CWE-121

3821 resultados

Estouro de buffer na pilha

Ocorre quando código escreve dados além dos limites de um buffer alocado na pilha (stack), sobrescrevendo informações críticas como endereços de retorno ou variáveis locais. Um atacante pode explorar isso para executar código arbitrário ou causar crash da aplicação.

Ejemplo

Uma função copia uma string de entrada diretamente em um array de 64 bytes sem validar o tamanho: `char buffer[64]; strcpy(buffer, user_input);` Se o usuário enviar uma string com 200 bytes, ela sobrescreverá o endereço de retorno e pode redirecionar a execução para código malicioso.

Cómo mitigar

Use funções seguras com limite de tamanho (`strncpy`, `snprintf`), valide e sanitize entradas antes de copiar, implemente proteções em tempo de execução (stack canaries, ASLR, DEP) e considere usar linguagens com verificação de limites automática quando possível.

CVE-2021-1325HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1329HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1328HIGHCisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service VulnerabilitiesEPSS 2.8%CVE-2021-1194HIGHCisco Small Business RV110W, RV130, RV130W, and RV215W 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-2021-1331HIGHCisco Small Business RV Series 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-2021-1340HIGHCisco 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-2021-43983HIGHWECON LeviStudioUEPSS 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-2014-0764—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%CVE-2014-0766—Advantech WebAccess Stack-based Buffer OverflowEPSS 2.7%CVE-2014-0768—Advantech WebAccess Stack-based Buffer OverflowEPSS 2.7%