USN-1831-2: OpenStack Nova regression
29 May 2013
USN-1831-1 introduced a regression in OpenStack Nova.
- nova - OpenStack Compute cloud infrastructure
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.