CVE-2020-17376
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | This is only an issue when libvirt is 1.3.4 and later. On Xenial, libvirt is 1.3.1 and is not vulnerable. This is fixed in focal-updates but is not yet in -security |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
nova Launchpad, Ubuntu, Debian |
bionic |
Released
(2:17.0.13-0ubuntu5.3)
|
| focal |
Released
(2:21.2.4-0ubuntu2.1)
|
|
| groovy |
Ignored
(reached end-of-life)
|
|
| hirsute |
Not vulnerable
(3:23.0.0-0ubuntu1)
|
|
| impish |
Not vulnerable
(3:23.0.0-0ubuntu1)
|
|
| jammy |
Not vulnerable
(3:23.0.0-0ubuntu1)
|
|
| kinetic |
Not vulnerable
(3:23.0.0-0ubuntu1)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(libvirt is earlier than 1.3.4)
|
|
|
Patches: upstream: https://review.opendev.org/747978 (Pike) upstream: https://review.opendev.org/747976 (Queens) upstream: https://review.opendev.org/747975 (Rocky) upstream: https://review.opendev.org/747974 (Stein) upstream: https://review.opendev.org/747973 (Train) upstream: https://review.opendev.org/747972 (Ussuri) upstream: https://review.opendev.org/747969 (Victoria) |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |