Skip to main content
No exploitation reportedFix available

CVE-2020-17376

No exploitation reported by the sources we read.

  • Published2020-08-26
  • Fixed in21.1.0 · 20.3.1 · 19.3.1
  • WeaknessCWE-611

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2020-08-2619:15CVE publishedNVD

Versions per branch

OSV · NVD
Openstack nova
BranchAffectedFixed in
21.x≥ 21.0.0, < 21.1.021.1.0
20.x≥ 20.0.0, < 20.3.120.3.1
19.3< 19.3.119.3.1
21.0= 21.0.0no fix published
—all versionsno fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • ansibleSUSE:OpenStack Cloud Crowbar 8all versions · fixed in 2.9.14-3.15.1
  • ansibleSUSE:OpenStack Cloud 8all versions · fixed in 2.9.14-3.15.1
  • ansibleSUSE:OpenStack Cloud 7all versions · fixed in 2.2.3.0-17.2
  • ansibleSUSE:HPE Helion OpenStack 8all versions · fixed in 2.9.14-3.15.1
  • ardana-ansibleSUSE:OpenStack Cloud 9all versions · fixed in 9.0+git.1596813072.110811d-3.25.2
  • ardana-ansibleSUSE:OpenStack Cloud 8all versions · fixed in 8.0+git.1596735237.54109b1-3.77.1
  • ardana-ansibleSUSE:HPE Helion OpenStack 8all versions · fixed in 8.0+git.1596735237.54109b1-3.77.1
  • ardana-cinderSUSE:OpenStack Cloud 9all versions · fixed in 9.0+git.1596129576.0b3d3ce-3.13.2

191 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-17376 Red Hat Product Security93 products fixed · 13 known affected

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

    openstack-nova as a component of Red Hat OpenStack Platform 16.2 · openstack-nova-api as a component of Red Hat OpenStack Platform 16.2 · openstack-nova-common as a component of Red Hat OpenStack Platform 16.2 · +10 more

  • RHSA-2020:3711 Red Hat Product Security18 products fixed

    Red Hat Security Advisory: openstack-nova security update

  • RHSA-2020:3708 Red Hat Product Security34 products fixed

    Red Hat Security Advisory: openstack-nova security update

  • RHSA-2020:3706 Red Hat Product Security15 products fixed

    Red Hat Security Advisory: openstack-nova security update

  • RHSA-2020:3704 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: openstack-nova security update

  • RHSA-2020:3702 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: openstack-nova security update

Full record on NVD

Fix

  1. Update Openstack nova to 21.1.0 · 20.3.1 · 19.3.1
  2. Vendor fix Red Hat Product Security RHSA-2020:3711 · 18 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  3. Workaround from the vendor Red Hat Product Security RHSA-2020:3711 · 18 productsPublic clouds using non-default configurations (allowing untrusted users to initiate live migrations) face significant additional risk. If it is not possible to immediately apply patches, a temporary policy change is recommended: disable soft reboots by setting wait_soft_reboot_seconds to zero. Thi…
  4. No fix available, says the vendor Red Hat Product Security CVE-2020-17376 · 13 productsAffected

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Published
2020-08-26
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-c7w7-9c85-4qxv

Frequently asked questions

What is CVE-2020-17376?

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.

Is CVE-2020-17376 actively exploited?

Active exploitation of CVE-2020-17376 has not been confirmed. Its EPSS score was 1.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-17376?

CVE-2020-17376 has a CVSS v3 base score of 8.3 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

Running nova? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record