Weaknesses of type CWE-20

5,393 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-2019-12657HIGHCisco IOS XE Software Unified Threat Defense Denial of Service VulnerabilityEPSS 2.0%CVE-2019-1962HIGHCisco NX-OS Software Cisco Fabric Services over IP 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-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-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-2020-1695HIGHA flaw was found in all resteasy 3.x.x versions prior to 3.12.0.Final and all resteasy 4.x.x versions prior to 4.6.0.Final, where an impropeEPSS 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-2021-1302HIGHCisco SD-WAN vManage Authorization Bypass VulnerabilitiesEPSS 2.0%CVE-2019-11255MEDIUMKubernetes CSI volume snapshot, cloning and resizing features can result in unauthorized volume data access or mutationEPSS 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-2021-20273—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-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-2020-10289HIGHRVD#2401: Use of unsafe yaml load, ./src/actionlib/tools/library.py:132EPSS 1.9%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-2019-13541—In Horner Automation Cscape 9.90 and prior, an improper input validation vulnerability has been identified that may be exploited by processiEPSS 1.9%CVE-2019-10191MEDIUMA vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-securEPSS 1.9%