Weaknesses of type CWE-20

5,357 results

Validação inadequada de entrada

O software recebe dados do usuário ou de fontes externas, mas não verifica ou verifica de forma incompleta se esses dados têm as propriedades necessárias para processar com segurança. Isso permite que entradas malformadas, maliciosas ou inesperadas passem por controles e causem comportamentos indevidos — desde crashes até injeção de código.

Example

Uma aplicação web recebe um parâmetro numérico via GET, mas não valida se é realmente um número inteiro válido antes de usá-lo em uma consulta SQL. Um atacante envia um valor com caracteres especiais (ex: `1' OR '1'='1`), conseguindo injetar código SQL direto no banco de dados.

How to mitigate

Implemente validação rigorosa na entrada: defina o tipo, formato, comprimento e intervalo esperados; rejeite tudo que não se encaixe. Use listas de caracteres permitidos ('whitelist'), escape de dados para o contexto específico (SQL, HTML, URL) e bibliotecas de validação consolidadas. Nunca confie em dados do cliente.

CVE-2021-37147—Request Smuggling - LF line endingEPSS 2.5%CVE-2018-1104—Ansible Tower through version 3.2.3 has a vulnerability that allows users only with access to define variables for a job template to executeEPSS 2.5%CVE-2019-1694HIGHCisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software TCP Timer Handling Denial of Service VulnerabilityEPSS 2.5%CVE-2019-1739HIGHCisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service VulnerabilitiesEPSS 2.5%CVE-2018-15460HIGHCisco Email Security Appliance URL Filtering Denial of Service VulnerabilityEPSS 2.5%CVE-2021-1252HIGHClam AntiVirus (ClamAV) Excel XLM Parser Denial of Service VulnerabilityEPSS 2.5%CVE-2019-1752HIGHCisco IOS and IOS XE Software ISDN Interface Denial of Service VulnerabilityEPSS 2.5%CVE-2019-1738HIGHCisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service VulnerabilityEPSS 2.5%CVE-2019-1751HIGHCisco IOS Software NAT64 Denial of Service VulnerabilityEPSS 2.5%CVE-2021-32566—Specific sequence of HTTP/2 frames can cause ATS to crashEPSS 2.5%CVE-2018-4850—A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) EPSS 2.5%CVE-2023-36585HIGHWindows upnphost.dll Denial of Service VulnerabilityEPSS 2.5%CVE-2018-0295—A vulnerability in the Border Gateway Protocol (BGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker EPSS 2.5%CVE-2018-0416MEDIUMCisco Wireless LAN Controller Software Information Disclosure VulnerabilityEPSS 2.5%CVE-2017-3850—A vulnerability in the Autonomic Networking Infrastructure (ANI) feature of Cisco IOS Software (15.4 through 15.6) and Cisco IOS XE SoftwareEPSS 2.5%CVE-2019-10245—In Eclipse OpenJ9 prior to the 0.14.0 release, the Java bytecode verifier incorrectly allows a method to execute past the end of bytecode arEPSS 2.5%CVE-2016-9578HIGHA vulnerability was discovered in SPICE before 0.13.90 in the server's protocol handling. An attacker able to connect to the SPICE server coEPSS 2.5%CVE-2022-25757—Apache APISIX: the body_schema check in request-validation plugin can be bypassedEPSS 2.5%CVE-2022-24775HIGHImproper Input Validation in guzzlehttp/psr7EPSS 2.5%CVE-2023-3893HIGHKubernetes - csi-proxy - Insufficient input sanitization leads to privilege escalationEPSS 2.5%