Bastian Blank discovered that libvirtd, a daemon for management of virtual machines, network and storage, would change ownership of devices files so they would be owned by user libvirt-qemu and group kvm , which is a general purpose group not specific to libvirt, allowing unintended write access to those devices and files for the kvm group members.
For the stable distribution (squeeze), this problem has been fixed in version 0.8.3-5+squeeze5. For the testing distribution (wheezy), this problem has been fixed in version 0.9.12-11. For the unstable distribution (sid), this problem has been fixed in version 0.9.12-11. We recommend that you upgrade your libvirt packages.
Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes).
libvirt on Debian Linux
This check tests the installed software version using the apt package manager.
Updated on 2015-03-25