Ubuntu Security Notice USN-1831-1
16th May, 2013
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.
- 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.
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: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.