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.
Weakness
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Nova | Openstack | * | 19.3.1 (excluding) |
| Nova | Openstack | 20.0.0 (including) | 20.3.1 (excluding) |
| Nova | Openstack | 21.0.0 (including) | 21.0.0 (including) |
| Red Hat OpenStack Platform 10.0 (Newton) | RedHat | openstack-nova-1:14.1.0-65.el7ost | * |
| Red Hat OpenStack Platform 13.0 (Queens) | RedHat | openstack-nova-1:17.0.13-24.el7ost | * |
| Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.6 EUS | RedHat | openstack-nova-1:17.0.13-24.el7ost | * |
| Red Hat OpenStack Platform 15.0 (Stein) | RedHat | openstack-nova-1:19.1.0-0.20200207070459.bf9d9e5.el8ost | * |
| Red Hat OpenStack Platform 16.0 (Train) | RedHat | openstack-nova-1:20.1.2-0.20200401205215.28324e6.el8ost | * |
| Red Hat OpenStack Platform 16.1 | RedHat | openstack-nova-1:20.3.1-0.20200626213436.38ee1f3.el8ost | * |
| Nova | Ubuntu | bionic | * |
| Nova | Ubuntu | esm-infra/bionic | * |
| Nova | Ubuntu | esm-infra/focal | * |
| Nova | Ubuntu | focal | * |
| Nova | Ubuntu | groovy | * |
| Nova | Ubuntu | trusty | * |