Falhas do tipo CWE-20

5.887 resultados

Validação inadequada de entrada

A aplicação recebe dados do usuário ou de fontes externas mas não valida (ou valida mal) se esses dados têm as propriedades necessárias para processamento seguro. Isso abre porta para injeção de código, buffer overflow, lógica corrompida e outros ataques que exploram dados malformados ou maliciosos.

Exemplo

Um formulário web aceita um CPF sem verificar se tem 11 dígitos numéricos, ou um app móvel recebe um ID de usuário em JSON sem confirmar se é um inteiro — atacantes exploram isso para acessar dados de outros usuários, executar queries SQL maliciosas ou causar erro de processamento.

Como mitigar

Implemente validação rigorosa na entrada: verifique tipo, comprimento, formato, intervalo de valores permitidos. Use whitelist (aceitar só o que você sabe ser seguro) em vez de blacklist. Valide tanto no cliente quanto no servidor, e use bibliotecas de parsing seguro para formatos complexos (XML, JSON).

CVE-2021-26626HIGHtobesoft XPLATFORM Arbitrary file execution VulnerabilityEPSS 1.3%CVE-2018-20804MEDIUMInvariant failure in applyOpsEPSS 1.2%CVE-2021-20195—A flaw was found in keycloak in versions before 13.0.0. A Self Stored XSS attack vector escalating to a complete account takeover is possiblEPSS 1.2%CVE-2026-33000CRITICALA malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS EPSS 1.2%CVE-2021-34432—In Eclipse Mosquitto versions 2.0.7 and earlier, the server will crash if the client tries to send a PUBLISH packet with topic length = 0.EPSS 1.2%CVE-2021-4204—An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a localEPSS 1.2%CVE-2022-23623HIGHValidation bypass in frourioEPSS 1.2%CVE-2022-23624HIGHValidation bypass in frourio-expressEPSS 1.2%CVE-2024-1247LOWConcrete CMS version 9 before 9.2.5 vulnerable to stored XSS via the Role Name fieldEPSS 1.2%CVE-2020-3160MEDIUMCisco Meeting Server Extensible Messaging and Presence Protocol Denial of Service VulnerabilityEPSS 1.2%CVE-2022-31766HIGHA vulnerability has been identified in RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2) (All versions < V7.1.2), RUGGEDCOM RM1224 LTE(4G) NAEPSS 1.2%CVE-2018-1110—A flaw was found in knot-resolver before version 2.3.0. Malformed DNS messages may cause denial of service.EPSS 1.2%CVE-2021-41173MEDIUMDoS via maliciously crafted p2p messageEPSS 1.2%CVE-2024-12912HIGHAn improper input insertion vulnerability in AiCloud on certain router models may lead to arbitrary command execution. Refer to the '01/02/2EPSS 1.2%CVE-2020-1679HIGHJunos OS: PTX/QFX Series: Kernel Routing Table (KRT) queue stuck after packet sampling a malformed packet when the tunnel-observation mpls-over-udp configuration is enabled.EPSS 1.2%CVE-2019-1933MEDIUMCisco Email Security Appliance Content Filter Bypass VulnerabilityEPSS 1.2%CVE-2024-21448MEDIUMMicrosoft Teams for Android Information Disclosure VulnerabilityEPSS 1.2%CVE-2020-7818HIGHDaviewIndy Heap Overflow VulnerabilityEPSS 1.2%CVE-2022-39232MEDIUMDiscourse vulnerable to incomplete quote causing a topic to crash in the browserEPSS 1.2%CVE-2021-29468HIGHArbitrary code execution when checking out an attacker-controlled Git branchEPSS 1.2%