CVE-2015-7713

OpenStack Compute (Nova) en versiones anteriores a 2014.2.4 (juno) y 2015.1.x en versiones anteriores a 2015.1.2 (kilo) no aplica correctamente los cambios de grupos de seguridad, lo que permite a atacantes remotos eludir las restricciones previstas mediante el aprovechamiento de una instancia que se estaba ejecutando cuando se hizo el cambio.

A vulnerability was discovered in the way OpenStack Compute (nova) networking handled security group updates; changes were not applied to already running VM instances. A remote attacker could use this flaw to access running VM instances.

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. A flaw was discovered in the OpenStack Compute snapshot feature when using the libvirt driver. A compute user could overwrite an attached instance disk with a malicious header specifying a backing file, and then request a snapshot, causing a file from the compute host to be leaked. This flaw only affects LVM or Ceph setups, or setups using filesystem storage with "use_cow_images = False".