Fallos del tipo CWE-20

5887 resultados

Validação inadequada de entrada

A aplicação recebe dados de fontes externas (usuário, API, arquivo) sem verificar se estão no formato, tamanho ou tipo esperado antes de usá-los. Isso permite que um atacante envie dados malformados ou maliciosos que podem causar erros, corrupção de dados, execução de código ou acesso não autorizado.

Ejemplo

Um formulário que aceita um número de idade sem validar se é um inteiro positivo entre 0 e 150. Um atacante envia idade=-5 ou idade='DROP TABLE users;' via SQL, e o código processa isso diretamente no banco sem sanitização, causando dano.

Cómo mitigar

Valide TODA entrada externa: verificar tipo, tamanho, formato e intervalo permitido antes de usar. Use whitelists (aceitar apenas valores conhecidos como seguros) em vez de blacklists, e aplique sanitização ou prepared statements para dados que vão em queries. Testes de entrada fuzzing também ajudam a encontrar gaps.

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-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-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-2021-41105HIGHFreeSWITCH susceptible to Denial of Service via invalid SRTP packetsEPSS 2.5%CVE-2021-37147—Request Smuggling - LF line endingEPSS 2.5%CVE-2019-1738HIGHCisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service VulnerabilityEPSS 2.5%CVE-2021-1252HIGHClam AntiVirus (ClamAV) Excel XLM Parser Denial of Service VulnerabilityEPSS 2.5%CVE-2018-15460HIGHCisco Email Security Appliance URL Filtering Denial of Service VulnerabilityEPSS 2.5%CVE-2019-1739HIGHCisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service VulnerabilitiesEPSS 2.5%