=========================================================================Ubuntu Security Notice USN-1831-2
May 29, 2013
nova regression
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
Summary:
USN-1831-1 introduced a regression in OpenStack Nova.
Software Description:
- nova: OpenStack Compute cloud infrastructure
Details:
USN-1831-1 fixed a vulnerability in OpenStack Nova. The upstream fix
introduced a regression where instances using uncached QCOW2 images would
fail to start. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
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 versions:
Ubuntu 12.10:
python-nova 2012.2.3-0ubuntu2.2
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-1831-2
https://ubuntu.com/security/notices/USN-1831-1
https://launchpad.net/bugs/1183606
Package Information:
https://launchpad.net/ubuntu/+source/nova/2012.2.3-0ubuntu2.2