Directory traversal vulnerability in virt/disk/api.py in OpenStack Compute (Nova) Folsom (2012.2) and Essex (2012.1), when used over libvirt-based hypervisors, allows remote authenticated users to write arbitrary files to the disk image via a .. (dot dot) in the path attribute of a file element.
https://lists.launchpad.net/openstack/msg14089.html
https://github.com/openstack/nova/commit/2427d4a99bed35baefd8f17ba422cb7aae8dcca7
https://bugs.launchpad.net/nova/+bug/1015531
http://www.ubuntu.com/usn/USN-1497-1
http://www.securityfocus.com/bid/54277
http://secunia.com/advisories/49802
http://secunia.com/advisories/49763
http://lists.fedoraproject.org/pipermail/package-announce/2012-July/083984.html