OpenStack Nova regression

ID USN-1831-2
Type ubuntu
Reporter Ubuntu
Modified 2013-05-29T00:00:00


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.