Published: 26 August 2020
An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0. By performing a soft reboot of an instance that has previously undergone live migration, a user may gain access to destination host devices that share the same paths as host devices previously referenced by the virtual machine on the source host. This can include block devices that map to different Cinder volumes at the destination than at the source. Only deployments allowing host-based connections (for instance, root and ephemeral devices) are affected.
CVSS 3 base score: 8.3
Launchpad, Ubuntu, Debian
|Ubuntu 20.10 (Groovy Gorilla)||
|Ubuntu 20.04 LTS (Focal Fossa)||
|Ubuntu 18.04 LTS (Bionic Beaver)||
|Ubuntu 16.04 LTS (Xenial Xerus)||
(libvirt is earlier than 1.3.4)
|Ubuntu 14.04 ESM (Trusty Tahr)||
Does not exist
This is only an issue when libvirt is 1.3.4 and later. On Xenial, libvirt is 1.3.1 and is not vulnerable.