CVE-2014-0134

El modo de rescate de instancia en OpenStack Compute (Nova) 2013.2 anterior a 2013.2.3 y Icehouse anterior a 2014.1, cuando utiliza libvirt para generar imagenes y use_cow_images está configurado a falso, permite a usuarios remotos autenticados leer ciertos archivos compute host mediante la sobrescritura de una instancia de disco con un imagen manipulado.

OpenStack Compute launches and schedules large networks of virtual machines, creating a redundant and scalable cloud computing platform. Compute provides the software, control panels, and APIs required to orchestrate a cloud, including running virtual machine instances, managing networks, and controlling access through users and projects. It was found that overwriting the disk inside of an instance with a malicious image, and then switching the instance to rescue mode, could potentially allow an authenticated user to access arbitrary files on the compute host depending on the file permissions and SELinux constraints of those files. Only setups that used libvirt to spawn instances and which had the use of cow images disabled were affected.