Falhas do tipo CWE-444

320 resultados

Interpretação inconsistente de requisições HTTP (HTTP Request Smuggling)

Ocorre quando um proxy, load balancer ou firewall interpreta uma requisição HTTP de forma diferente do servidor backend. Um atacante envia uma requisição ambígua que a camada intermediária processa como um pedido, mas o servidor entende como dois pedidos distintos — permitindo contornar controles de segurança, injetar requisições maliciosas ou sequestrar sessões de outros usuários.

Exemplo

Um proxy usa Content-Length para delimitar o corpo da requisição, enquanto o servidor backend prioriza Transfer-Encoding: chunked. O atacante envia um payload onde a primeira requisição termina segundo o proxy, mas o servidor vê uma segunda requisição oculta no corpo — essa segunda requisição pode roubar dados de sessão de outros usuários ou contornar WAF.

Como mitigar

Desabilite Transfer-Encoding: chunked em proxies se possível, normalize e valide rigorosamente headers HTTP (Content-Length e Transfer-Encoding não devem coexistir), mantenha proxy e servidor backend sincronizados em versão e configuração, e teste parsing ambíguo com ferramentas como http-request-smuggler.

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-2021-37147Request Smuggling - LF line endingEPSS 2.5%CVE-2021-22960The 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-2022-22532In 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-2021-32565HTTP 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-2017-7559In Undertow 2.x before 2.0.0.Alpha2, 1.4.x before 1.4.17.Final, and 1.3.x before 1.3.31.Final, it was found that the fix for CVE-2017-2666 wEPSS 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-2022-2466It 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%