USN-1831-1: OpenStack Nova vulnerability

Ubuntu Security Notice USN-1831-1

16th May, 2013

nova vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 13.04
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS


Nova could be made to crash the system if instances used a specially crafted image.

Software description

  • nova - OpenStack Compute cloud infrastructure


Loganathan Parthipan discovered that Nova did not verify the size of QCOW2
instance storage. An authenticated attacker could exploit this to cause a
denial of service by creating an image with a large virtual size with
little data, then filling the virtual disk.

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 13.04:
python-nova 1:2013.1-0ubuntu2.1
Ubuntu 12.10:
python-nova 2012.2.3-0ubuntu2.1
Ubuntu 12.04 LTS:
python-nova 2012.1.3+stable-20130423-e52e6912-0ubuntu1.1

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.