CVE-2017-12615

Cuando se ejecuta Apache Tomcat en sus versiones 7.0.0 a 7.0.79 en Windows con HTTP PUT habilitado (por ejemplo, estableciendo el parámetro de inicialización de solo lectura del Default en "false") fue posible subir un archivo JSP al servidor mediante una petición especialmente manipulada. Este archivo JSP podría ser solicitado y cualquier código que contenga podría ser ejecutado por el servidor.

A vulnerability was discovered in Tomcat where if a servlet context was configured with readonly=false and HTTP PUT requests were allowed, an attacker could upload a JSP file to that context and achieve code execution.

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages technologies. Security Fix: A vulnerability was discovered in Tomcat's handling of pipelined requests when "Sendfile" was used. If sendfile processing completed quickly, it was possible for the Processor to be added to the processor cache twice. This could lead to invalid responses or information disclosure. A vulnerability was discovered in the error page mechanism in Tomcat's DefaultServlet implementation. A crafted HTTP request could cause undesired side effects, possibly including the removal or replacement of the custom error page.

When running Apache Tomcat on Windows with HTTP PUTs enabled, it is possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.