CVE-2015-5739

La biblioteca net/http en net/textproto/reader.go en Go en versiones anteriores a la 1.4.3 no analiza sintácticamente claves de cabecera HTTP correctamente, lo que permite que atacantes remotos lleven a cabo ataques de contrabando de peticiones HTTP mediante un espacio en lugar de un guión, tal y como se muestra en "Content Length", en lugar de "Content-Length".

HTTP-request vulnerabilities have been found in the Golang net/http and net/textproto libraries. Request headers with double Content-Length fields do not generate a 400 error (the second field is ignored), and invalid fields are parsed as valid (for example, "Content Length:" with a space in the middle is accepted). A non-authenticated attacker could exploit these flaws to bypass security controls, perform web-cache poisoning, or alter the request/response map (denial of service).