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Fencer Vulns
high 8.6

CVE-2017-17051 json

OpenStack Nova DoS by rebuilding the same instance with a new image multiple times

published 2017-12-05 8 y ago modified 2026-07-06 4 mo ago also GHSA-vq76-rxx3-4r4r , PYSEC-2026-692 , EUVD-2022-5404

cvss
8.6
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

An issue was discovered in the default FilterScheduler in OpenStack Nova 16.0.3. By repeatedly rebuilding an instance with new images, an authenticated user may consume untracked resources on a hypervisor host leading to a denial of service, aka doubled resource allocations. This regression was introduced with the fix for OSSA-2017-005 (CVE-2017-16239); however, only Nova stable/pike or later deployments with that fix applied and relying on the default FilterScheduler are affected.

Patch / fix

  • pypi nova 16.0.4
  • nova Debian 14, Debian 13, Debian 12 2:16.0.3-6

debian advisories DEBIAN-CVE-2017-17051

  • ardana-db OpenStack Cloud 9 9.0+git.1564409964.b7e4fc3-3.7.2
  • ardana-mq OpenStack Cloud 9 9.0+git.1565115025.148d092-3.7.2
  • ardana-ses OpenStack Cloud 9 9.0+git.1565962617.523149b-3.7.2
  • crowbar-ha OpenStack Cloud Crowbar 9 6.0+git.1566406179.7549de2-3.7.2
  • crowbar-ui OpenStack Cloud Crowbar 9 1.3.0+git.1563181545.65360af5-8.1
  • ardana-heat OpenStack Cloud 9 9.0+git.1565721273.f44b8d7-3.7.2
  • ardana-nova OpenStack Cloud 9 9.0+git.1566332515.e232568-3.7.2
  • ardana-swift OpenStack Cloud 9 9.0+git.1565891872.73fc3c7-3.7.2

suse advisories SUSE-SU-2019:2267-1SUSE-SU-2019:2219-1

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-2017-17051 updated cvss 5.3

openstack-nova: Nova FilterScheduler doubles resource allocations during rebuild with new image

  • Red Hat Enterprise Linux OpenStack Platform 6 (Juno) openstack-nova Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) python-nova, openstack-nova, openstack-nova-api, openstack-nova-cert, openstack-nova-cells, openstack-nova-common, +9 more Red Hat OpenStack Platform 8 (Liberty) python-nova, openstack-nova, openstack-nova-api, openstack-nova-cert, openstack-nova-cells, openstack-nova-common, +9 more Red Hat OpenStack Platform 9 (Mitaka) python-nova, openstack-nova, python-nova-tests, openstack-nova-api, openstack-nova-cert, openstack-nova-cells, +10 more Red Hat OpenStack Platform 10 (Newton) python-nova, openstack-nova, python-nova-tests, openstack-nova-api, openstack-nova-cert, openstack-nova-cells, +11 more Red Hat OpenStack Platform 11 (Ocata) openstack-nova
    +1 more products
    Red Hat OpenStack Platform 12 (Pike) python-nova, openstack-nova, python-nova-tests, openstack-nova-api, openstack-nova-cells, openstack-nova-common, +10 more
    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

1.99% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 8.6 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P
GitHub 3.0 8.6 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
OSV 3.0 8.6 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi nova
<16.0.4
16.0.4

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

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.