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USN-2325-1: OpenStack Nova vulnerability

21 August 2014

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



  • 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

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