CVE-2015-0253

La función read_request_line en server/protocol.c del Servidor HTTP Apache en su versión 2.4.12 no inicializa el protocolo de estructura de miembro, lo que permite a atacantes remotos causar una denegación de servicio mediante la referencia a un puntero NULO y la caída procesos a través del envío de una solicitud que carece de un método para una instalación que habilita el filtro INCLUDE y tiene una directiva ErrorDocument 400 especificando un URI local.

A NULL pointer dereference flaw was found in the way httpd generated certain error responses. A remote attacker could possibly use this flaw to crash the httpd child process using a request that triggers a certain HTTP error.

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Multiple flaws were found in the way httpd parsed HTTP requests and responses using chunked transfer encoding. A remote attacker could use these flaws to create a specially crafted request, which httpd would decode differently from an HTTP proxy software in front of it, possibly leading to HTTP request smuggling attacks. It was discovered that in httpd 2.4, the internal API function ap_some_auth_required() could incorrectly indicate that a request was authenticated even when no authentication was used. An httpd module using this API function could consequently allow access that should have been denied.