CVE-2014-0226

Condición de carrera en el módulo mod_status en Apache HTTP Server anterior a 2.4.10 permite a atacantes remotos causar una denegación de servicio (desbordamiento de buffer basado en memoria dinámica), o posiblemente obtener información sensible de credenciales o ejecutar código arbitrario, a través de una solicitud manipulada que provoca el manejo indebido de la tabla de clasificación (scoreboard) dentro de la función status_handler en modules/generators/mod_status.c y la función lua_ap_scoreboard_worker en modules/lua/lua_request.c.

A race condition flaw, leading to heap-based buffer overflows, was found in the mod_status httpd module. A remote attacker able to access a status page served by mod_status on a server using a threaded Multi-Processing Module (MPM) could send a specially crafted request that would cause the httpd child process to crash or, possibly, allow the attacker to execute arbitrary code with the privileges of the "apache" user.

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apache HTTPD server. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the updating of mod_status. A race condition in mod_status allows an attacker to disclose information or corrupt memory with several requests to endpoints with handler server-status and other endpoints. By abusing this flaw, an attacker can possibly disclose credentials or leverage this situation to achieve remote code execution.

A race condition between updating httpd's "scoreboard" and mod_status leads to scenarios where a heap buffer overflow can occur with a user supplied payload. It can also leak heap and critical memory such as htaccess credentials, SSL private keys, and more. Apache version 2.4.7 is affected.