Falhas do tipo CWE-20

5.847 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-2019-12657HIGHCisco IOS XE Software Unified Threat Defense Denial of Service VulnerabilityEPSS 2.0%CVE-2023-25696CRITICALApache Airflow Hive Provider Beeline RCEEPSS 2.0%CVE-2021-29486HIGHImproper Input Validation and Loop with Unreachable Exit Condition ('Infinite Loop') in cumulative-distribution-functionEPSS 2.0%CVE-2021-45116HIGHAn issue was discovered in Django 2.2 before 2.2.26, 3.2 before 3.2.11, and 4.0 before 4.0.1. Due to leveraging the Django Template LanguageEPSS 2.0%CVE-2020-10289HIGHRVD#2401: Use of unsafe yaml load, ./src/actionlib/tools/library.py:132EPSS 2.0%CVE-2018-0298—A vulnerability in the web UI of Cisco FXOS and Cisco UCS Fabric Interconnect Software could allow an unauthenticated, remote attacker to caEPSS 2.0%CVE-2018-10930MEDIUMA flaw was found in RPC request using gfs3_rename_req in glusterfs server. An authenticated attacker could use this flaw to write to a destiEPSS 2.0%CVE-2019-12655HIGHCisco IOS XE Software FTP Application Layer Gateway for NAT, NAT64, and ZBFW Denial of Service VulnerabilityEPSS 2.0%CVE-2021-21404HIGHCrash due to malformed relay protocol messageEPSS 2.0%CVE-2020-36332—A flaw was found in libwebp in versions before 1.0.1. When reading a file libwebp allocates an excessive amount of memory. The highest threaEPSS 2.0%CVE-2017-3846—A vulnerability in the Client Manager Server of Cisco Workload Automation and Cisco Tidal Enterprise Scheduler could allow an unauthenticateEPSS 2.0%CVE-2020-9743MEDIUMHTML injection in AEM's content editor componentEPSS 2.0%CVE-2018-15428—Cisco IOS XR Software Border Gateway Protocol Denial of Service VulnerabilityEPSS 2.0%CVE-2021-23192—A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragmenEPSS 2.0%CVE-2021-20273—A flaw was found in privoxy before 3.0.32. A crash can occur via a crafted CGI request if Privoxy is toggled off.EPSS 2.0%CVE-2020-8187—Improper input validation in Citrix ADC and Citrix Gateway versions before 11.1-63.9 and 12.0-62.10 allows unauthenticated users to perform EPSS 1.9%CVE-2020-7069MEDIUMWrong ciphertext/tag in AES-CCM encryption for a 12 bytes IVEPSS 1.9%CVE-2025-34116HIGHIPFire < 2.19 Core Update 101 proxy.cgi RCEEPSS 1.9%CVE-2026-5946HIGHInvalid handling of CLASS != INEPSS 1.9%CVE-2022-24723MEDIUMImproper Input Validation in URI.jsEPSS 1.9%