CVE-2015-3183

Vulnerabilidad en la implementación de la codificación de transferencia fragmentada en el Servidor HTTP Apache en versiones anteriores a la 2.4.14 no analiza adecuadamente los fragmentos de las cabeceras lo cual permite a atacantes remotos efectuar ataques de infiltración de solicitudes HTTP a través de peticiones manipuladas, relacionada con el mal manejo de los valores fragmentados de gran tamaño y extensiones fragmentadas no válidas en modules/http/http_filters.c.

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.

Potential security vulnerabilities have been identified with HP-UX Web Server Suite running Apache on HP-UX 11iv3. These vulnerabilities could be exploited remotely to create a Denial of Service (DoS) and other impacts including: The TLS vulnerability using US export-grade 512-bit keys in Diffie-Hellman key exchange known as "Logjam" could be exploited remotely to allow unauthorized modification. The RC4 stream cipher vulnerability in SSL/TLS known as "Bar Mitzvah" could be exploited remotely to allow disclosure of information. Apache does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters. Revision 1 of this advisory.