The LXC driver (lxc/lxc_driver.c) in libvirt 1.0.1 through 1.2.1 allows local users to (1) delete arbitrary host devices via the virDomainDeviceDettach API and a symlink attack on /dev in the container; (2) create arbitrary nodes (mknod) via the virDomainDeviceAttach API and a symlink attack on /dev in the container; and cause a denial of service (shutdown or reboot host OS) via the (3) virDomainShutdown or (4) virDomainReboot API and a symlink attack on /dev/initctl in the container, related to "paths under /proc/$PID/root" and the virInitctlSetRunLevel function.
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "1.2.2-0ubuntu1", "binary_name": "libvirt-bin" }, { "binary_version": "1.2.2-0ubuntu1", "binary_name": "libvirt-dev" }, { "binary_version": "1.2.2-0ubuntu1", "binary_name": "libvirt-doc" }, { "binary_version": "1.2.2-0ubuntu1", "binary_name": "libvirt0" }, { "binary_version": "1.2.2-0ubuntu1", "binary_name": "libvirt0-dbg" } ] }