CVE-2020-17376
OpenStack Nova Live migration fails to update persistent domain XML
Description
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.
How to fix CVE-2020-17376
To remediate CVE-2020-17376, upgrade the affected package to a fixed version below.
- —upgrade to 2:21.1.0-1 or later
- —upgrade to 19.3.1 or later
- —upgrade to 19.3.1 or later
Is CVE-2020-17376 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2:21.1.0-1
- from 0, < 19.3.1
- from 0, < 19.3.1, >= 20.0.0, < 20.3.1, >= 21.0.0, < 21.1.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH8.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |