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Fencer Vulns
high 8.3

CVE-2020-17376 json

OpenStack Nova Live migration fails to update persistent domain XML

published 2020-08-26 6 y ago modified 2026-06-17 4 mo ago also GHSA-c7w7-9c85-4qxv , PYSEC-2020-243 , EUVD-2020-0117

cvss
8.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi nova 19.3.1, 20.3.1, 21.1.0
  • openstack nova 19.3.1, 20.3.1
  • nova Debian 14, Debian 13, Debian 12 2:21.1.0-1

debian advisories DEBIAN-CVE-2020-17376

  • nova Ubuntu 18.04 LTS 2:17.0.13-0ubuntu5.3
  • nova Ubuntu 20.04 LTS 2:21.2.4-0ubuntu2.1

ubuntu advisories UBUNTU-CVE-2020-17376

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openstack-nova openstack 16.1 1:20.3.1-0.20200626213436.38ee1f3.el8ost
  • python3-nova openstack 16.1 1:20.3.1-0.20200626213436.38ee1f3.el8ost
  • openstack-nova-api openstack 16.1 1:20.3.1-0.20200626213436.38ee1f3.el8ost
  • openstack-nova-common openstack 16.1 1:20.3.1-0.20200626213436.38ee1f3.el8ost
  • openstack-nova-compute openstack 16.1 1:20.3.1-0.20200626213436.38ee1f3.el8ost
  • openstack-nova-console openstack 16.1 1:20.3.1-0.20200626213436.38ee1f3.el8ost
  • openstack-nova-conductor openstack 16.1 1:20.3.1-0.20200626213436.38ee1f3.el8ost
  • openstack-nova-migration openstack 16.1 1:20.3.1-0.20200626213436.38ee1f3.el8ost

red hat advisories RHSA-2020:3702RHSA-2020:3704RHSA-2020:3708RHSA-2020:3706RHSA-2020:3711

  • storm OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 1.2.3-3.6.1
  • ansible OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 2.9.14-3.15.1
  • grafana OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 6.7.4-4.12.1
  • ardana-mq OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1593618123.678c32b-3.26.1
  • ardana-nova OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1601298847.dd01585-3.42.1
  • crowbar-core OpenStack Cloud Crowbar 8 5.0+git.1600432272.b3ad722f0-3.44.1
  • python-kombu OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 4.1.0-3.7.1
  • ardana-cinder OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1596129856.263f430-3.43.1

suse advisories SUSE-SU-2020:3309-1SUSE-SU-2020:2911-1SUSE-SU-2020:2876-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-17376 updated cvss 8.3

openstack-nova: Soft reboot after live-migration reverts instance to original source domain XML

  • Red Hat OpenStack Platform 16.2 python3-nova, openstack-nova, openstack-nova-api, openstack-nova-common, openstack-nova-compute, openstack-nova-console, +6 more
    affected: workaround, no fix available
  • Red Hat OpenStack Platform 10.0 python-nova 14.1.0-65.el7ost, openstack-nova 14.1.0-65.el7ost, python-nova-tests 14.1.0-65.el7ost, openstack-nova-api 14.1.0-65.el7ost, openstack-nova-cert 14.1.0-65.el7ost, openstack-nova-cells 14.1.0-65.el7ost, +11 more
    fixed: vendor fix RHSA-2020:3711
  • Red Hat OpenStack Platform 13.0 python-nova 17.0.13-24.el7ost, openstack-nova 17.0.13-24.el7ost, python-nova-tests 17.0.13-24.el7ost, openstack-nova-api 17.0.13-24.el7ost, openstack-nova-cells 17.0.13-24.el7ost, openstack-nova-common 17.0.13-24.el7ost, +10 more Red Hat OpenStack Platform 13.0 for RHEL 7.6 EUS Server python-nova 17.0.13-24.el7ost, openstack-nova 17.0.13-24.el7ost, python-nova-tests 17.0.13-24.el7ost, openstack-nova-api 17.0.13-24.el7ost, openstack-nova-cells 17.0.13-24.el7ost, openstack-nova-common 17.0.13-24.el7ost, +10 more
    fixed: vendor fix RHSA-2020:3708
  • Red Hat OpenStack Platform 15.0 python3-nova 19.1.0-0.20200207070459.bf9d9e5.el8ost, openstack-nova 19.1.0-0.20200207070459.bf9d9e5.el8ost, openstack-nova-api 19.1.0-0.20200207070459.bf9d9e5.el8ost, openstack-nova-cells 19.1.0-0.20200207070459.bf9d9e5.el8ost, openstack-nova-common 19.1.0-0.20200207070459.bf9d9e5.el8ost, openstack-nova-compute 19.1.0-0.20200207070459.bf9d9e5.el8ost, +8 more
    fixed: vendor fix RHSA-2020:3706
  • Red Hat OpenStack Platform 16.0 python3-nova 20.1.2-0.20200401205215.28324e6.el8ost, openstack-nova 20.1.2-0.20200401205215.28324e6.el8ost, openstack-nova-api 20.1.2-0.20200401205215.28324e6.el8ost, openstack-nova-common 20.1.2-0.20200401205215.28324e6.el8ost, openstack-nova-compute 20.1.2-0.20200401205215.28324e6.el8ost, openstack-nova-console 20.1.2-0.20200401205215.28324e6.el8ost, +6 more
    fixed: vendor fix RHSA-2020:3704
  • Red Hat OpenStack Platform 16.1 python3-nova 20.3.1-0.20200626213436.38ee1f3.el8ost, openstack-nova 20.3.1-0.20200626213436.38ee1f3.el8ost, openstack-nova-api 20.3.1-0.20200626213436.38ee1f3.el8ost, openstack-nova-common 20.3.1-0.20200626213436.38ee1f3.el8ost, openstack-nova-compute 20.3.1-0.20200626213436.38ee1f3.el8ost, openstack-nova-console 20.3.1-0.20200626213436.38ee1f3.el8ost, +6 more
    fixed: vendor fix RHSA-2020:3702
  • Red Hat OpenStack Platform 17.1 python3-nova, openstack-nova, openstack-nova-api, openstack-nova-common, openstack-nova-compute, openstack-nova-conductor, +5 more Red Hat OpenStack Platform 18.0 openstack-nova
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.76% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • launchpad.net https://launchpad.net/bugs/1890501 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
pypi nova
<19.3.1
>=20.0.0, <20.3.1
1 listed version
>=21.0.0, <21.1.0
19.3.1
20.3.1
21.1.0

Classification

Weakness
  • CWE-611 Improper Restriction of XML External Entity Reference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.