Fallos del tipo CWE-444

323 resultados

Interpretação inconsistente de requisições HTTP (HTTP Request Smuggling)

Ocorre quando proxies, load balancers ou firewalls interpretam requisições HTTP de forma diferente do servidor backend. Um atacante explora essa discrepância enviando requisições ambíguas (com headers conflitantes ou corpo malformado) que são parseadas de modos distintos por camadas diferentes da infraestrutura, permitindo contornar controles de segurança ou injetar requisições não autorizadas no backend.

Ejemplo

Um proxy usa Content-Length para determinar o fim da requisição, enquanto o servidor backend usa Transfer-Encoding: chunked. O atacante envia uma requisição que contém dois requests: um legítimo (que passa pelo proxy) e um malicioso embutido no corpo (que o backend processa como requisição separada). Resultado: bypass de WAF ou injeção de cache envenenado.

Cómo mitigar

Normalize o parsing: garanta que todas as camadas (proxy, load balancer, aplicação) usem as mesmas regras RFC 7230 para interpretar headers Content-Length e Transfer-Encoding; desabilite métodos ambíguos no proxy (reject requisições com ambos os headers); mantenha proxies e servidores sincronizados em versões e configurações de parsing HTTP.

CVE-2023-46589HIGHApache Tomcat: HTTP request smuggling via malformed trailer headersEPSS 2.7%CVE-2019-16789HIGHHTTP Request Smuggling in Waitress: Invalid whitespace characters in headersEPSS 2.6%CVE-2019-16785HIGHHTTP Request Smuggling: LF vs CRLF handling in WaitressEPSS 2.5%CVE-2021-37147—Request Smuggling - LF line endingEPSS 2.5%CVE-2021-22960—The parse function in llhttp < 2.1.4 and < 6.0.6. ignores chunk extensions when parsing the body of chunked requests. This leads to HTTP ReqEPSS 2.5%CVE-2019-16786HIGHHTTP Request Smuggling: Invalid Transfer-Encoding in WaitressEPSS 2.4%CVE-2022-22532—In SAP NetWeaver Application Server Java - versions KRNL64NUC 7.22, 7.22EXT, 7.49, KRNL64UC, 7.22, 7.22EXT, 7.49, 7.53, KERNEL 7.22, 7.49, 7EPSS 2.4%CVE-2022-31081HIGHInconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in HTTP::DaemonEPSS 2.3%CVE-2022-24790CRITICALHTTP Request Smuggling in pumaEPSS 2.2%CVE-2021-32565—HTTP Request Smuggling, content length with invalid chartersEPSS 2.1%CVE-2023-27522HIGHApache HTTP Server: mod_proxy_uwsgi HTTP response splittingEPSS 2.1%CVE-2022-25763MEDIUMImproper input validation on HTTP/2 headers EPSS 2.0%CVE-2019-16792HIGHHTTP Request Smuggling: Content-Length Sent Twice in WaitressEPSS 2.0%CVE-2026-40175MEDIUMAxios has Unrestricted Cloud Metadata Exfiltration via Header Injection ChainEPSS 1.9%CVE-2022-36760CRITICALApache HTTP Server: mod_proxy_ajp Possible request smugglingEPSS 1.9%CVE-2022-2466—It was found that Quarkus 2.10.x does not terminate HTTP requests header context which may lead to unpredictable behavior.EPSS 1.9%CVE-2017-12165LOWIt was discovered that Undertow before 1.4.17, 1.3.31 and 2.0.0 processes http request headers with unusual whitespaces which can cause possEPSS 1.9%CVE-2022-24761HIGHHTTP Request Smuggling in waitressEPSS 1.8%CVE-2022-20713MEDIUMA vulnerability in the VPN web client services component of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat DefeEPSS 1.7%CVE-2023-33193CRITICALEmby Server Proxy Header Spoofing VulnerabilityEPSS 1.7%