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-2018-0112—A vulnerability in Cisco WebEx Business Suite clients, Cisco WebEx Meetings, and Cisco WebEx Meetings Server could allow an authenticated, rEPSS 2.6%CVE-2018-10927HIGHA flaw was found in RPC request using gfs3_lookup_req in glusterfs server. An authenticated attacker could use this flaw to leak informationEPSS 2.6%CVE-2020-3454HIGHCisco NX-OS Software Call Home Command Injection VulnerabilityEPSS 2.6%CVE-2018-10926HIGHA flaw was found in RPC request using gfs3_mknod_req supported by glusterfs server. An authenticated attacker could use this flaw to write fEPSS 2.6%CVE-2025-34111CRITICALTiki Wiki <= 15.1 ELFinder Unauthenticated File Upload RCEEPSS 2.6%CVE-2018-14663MEDIUMAn issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing data such that the adEPSS 2.6%CVE-2019-1597HIGHCisco FXOS and NX-OS Lightweight Directory Access Protocol Denial of Service VulnerabilitiesEPSS 2.5%CVE-2019-1598HIGHCisco FXOS and NX-OS Lightweight Directory Access Protocol Denial of Service VulnerabilitiesEPSS 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-2018-15450MEDIUMCisco Prime Collaboration Assurance File Overwrite VulnerabilityEPSS 2.5%CVE-2021-36014LOWAdobe Media Encoder MP4 File Parsing Uninitialized Variable Information Disclosure VulnerabilityEPSS 2.5%CVE-2017-3852—A vulnerability in the Cisco application-hosting framework (CAF) component of the Cisco IOx application environment could allow an authenticEPSS 2.5%CVE-2023-27043MEDIUMThe email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2EPSS 2.5%CVE-2018-14635MEDIUMWhen using the Linux bridge ml2 driver, non-privileged tenants are able to create and attach ports without specifying an IP address, bypassiEPSS 2.5%CVE-2021-41105HIGHFreeSWITCH susceptible to Denial of Service via invalid SRTP packetsEPSS 2.5%CVE-2021-37147—Request Smuggling - LF line endingEPSS 2.5%CVE-2019-1751HIGHCisco IOS Software NAT64 Denial of Service VulnerabilityEPSS 2.5%CVE-2019-1752HIGHCisco IOS and IOS XE Software ISDN Interface 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-2021-1252HIGHClam AntiVirus (ClamAV) Excel XLM Parser Denial of Service VulnerabilityEPSS 2.5%