CVE-2017-2630

Se ha encontrado un fallo de desbordamiento de búfer basado en pila en Quick Emulator (QEMU) en versiones anteriores a la 2.9 construida con el soporte de cliente de Network Block Device (NBD). El fallo puede ocurrir durante el procesamiento de la respuesta del servidor a una petición "NBD_OPT_LIST". Un servidor NBD malicioso podría usar este problema para provocar el cierre inesperado de un cliente NBD remoto, resultando en una denegación de servicio (DoS) o potencialmente ejecutando código arbitrario en el host del cliente con privilegios del proceso QEMU.

A stack buffer overflow flaw was found in the Quick Emulator (QEMU) built with the Network Block Device (NBD) client support. The flaw could occur while processing server's response to a 'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.

KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. The following packages have been upgraded to a later upstream version: qemu-kvm-rhev. Security Fix: A stack buffer overflow flaw was found in the Quick Emulator built with the Network Block Device client support. The flaw could occur while processing server's response to a 'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.