USN-2325-1: OpenStack Nova vulnerability

21 August 2014

nova vulnerability

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

  • Ubuntu 14.04 LTS


OpenStack Nova could be made to expose sensitive information over the network.

Software Description

  • nova - OpenStack Compute cloud infrastructure


Alex Gaynor discovered that OpenStack Nova would sometimes respond with variable times when comparing authentication tokens. If nova were configured to proxy metadata requests via Neutron, a remote authenticated attacker could exploit this to conduct timing attacks and ascertain configuration details of another instance.

Update instructions

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

Ubuntu 14.04 LTS
python-nova - 1:2014.1.2-0ubuntu1.1

To update your system, please follow these instructions:

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