CVE-2015-5162

El analizador de imagen en OpenStack Cinder 7.0.2 y 8.0.0 hasta la versión 8.1.1; Glance en versiones anteriores a 11.0.1 y 12.0.0; y Nova en versiones anteriores a 12.0.4 y 13.0.0 no limita adecuadamente las llamadas a qemu-img, lo que podría permitir a atacantes provocar una denegación de servicio (consumo de memoria y disco) a través de una imagen de disco manipulada.

A resource vulnerability in the OpenStack Compute (nova), Block Storage (cinder), and Image (glance) services was found in their use of qemu-img. An unprivileged user could consume as much as 4 GB of RAM on the compute host by uploading a malicious image. This flaw could lead possibly to host out-of-memory errors and negatively affect other running tenant instances. oslo.concurrency has been updated to support process limits ('prlimit'), which is needed to fix this flaw.

The Oslo concurrency library has utilities for safely running multi-thread, multi-process applications using locking mechanisms, and for running external processes. 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 and controlling access through users and projects. OpenStack Image Service provides discovery, registration, and delivery services for disk and server images. The service provides the ability to copy or snapshot a server image, and immediately store it away. Stored images can be used as a template to get new servers up and running quickly and more consistently than installing a server operating system and individually configuring additional services.