Uočena je i ispravljena sigurnosna ranjivost programskog paketa openstack-nova koju zlonamjerni napadač može iskoristiti za izvođenje DoS napada.

==========================================================================
Ubuntu Security Notice USN-1438-1
May 03, 2012

nova vulnerability
==========================================================================

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10

Summary:

Nova could be made to crash the system under certain conditions.

Software Description:
- nova: OpenStack Compute cloud infrastructure

Details:

Dan Prince discovered that Nova did not enforce quotas for security groups
and rules added to security groups. An authenticated user could exploit
this to cause a denial of service.

Update instructions:

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

Ubuntu 12.04 LTS:
  python-nova                     2012.1-0ubuntu2.1

Ubuntu 11.10:
  python-nova                     2011.3-0ubuntu6.6

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

References:
  http://www.ubuntu.com/usn/usn-1438-1
  CVE-2012-2101

Package Information:
  https://launchpad.net/ubuntu/+source/nova/2012.1-0ubuntu2.1
  https://launchpad.net/ubuntu/+source/nova/2011.3-0ubuntu6.6