libvirt: not setting user defined backing store format when creating new image

Red Hat libvirt, possibly 0.6.0 through 0.8.2, creates new images without setting the user-defined backing-store format, which allows guest OS users to read arbitrary files on the host OS via unspecified vectors...

Low: Red Hat Security Advisory: libvirt security and bug fix update

Updated libvirt packages that fix two security issues and three bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low security impact. Common Vulnerability Scoring System CVSS base scores, which give detailed severity ratings...