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Fencer Intel
high 7.5

CVE-2017-18191 json

OpenStack Nova Denial of service attack on the compute host

published 2018-02-19 8 y ago modified 2026-07-06 4 mo ago also GHSA-ffmh-r67w-m88f , PYSEC-2026-689 , EUVD-2022-3763

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

An issue was discovered in OpenStack Nova 15.x through 15.1.0 and 16.x through 16.1.1. By detaching and reattaching an encrypted volume, an attacker may access the underlying raw volume and corrupt the LUKS header, resulting in a denial of service attack on the compute host. (The same code error also results in data loss, but that is not a vulnerability because the user loses their own data.) All Nova setups supporting encrypted volumes are affected.

Patch / fix

  • pypi nova 15.1.1, 16.1.2
  • nova Debian 14, Debian 13, Debian 12 2:17.0.0-1

debian advisories DEBIAN-CVE-2017-18191

  • nova Ubuntu Pro 16.04 LTS 2:13.1.4-0ubuntu4.5+esm1

ubuntu advisories UBUNTU-CVE-2017-18191

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 10 1:14.1.0-26.el7ost
  • python-nova openstack 10 1:14.1.0-26.el7ost
  • python-nova-tests openstack 10 1:14.1.0-26.el7ost
  • openstack-nova-api openstack 10 1:14.1.0-26.el7ost
  • openstack-nova-cert openstack 10 1:14.1.0-26.el7ost
  • openstack-nova-cells openstack 10 1:14.1.0-26.el7ost
  • openstack-nova-common openstack 10 1:14.1.0-26.el7ost
  • openstack-nova-compute openstack 10 1:14.1.0-26.el7ost

red hat advisories RHSA-2018:2714RHSA-2018:2332RHSA-2018:2855

  • openstack-nova OpenStack Cloud 7 14.0.11~dev13-4.22.1

suse advisories SUSE-SU-2018:1448-1

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-2017-18191 updated cvss 6.5

openstack-nova: Swapping encrypted volumes can allow an attacker to corrupt the LUKS header causing a denial of service in the host

  • 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 11 (Ocata) openstack-nova
    affected: no fix planned “Will not fix”
  • Red Hat OpenStack Platform 16.2 python3-nova, openstack-nova, openstack-nova-api, openstack-nova-common, openstack-nova-compute, openstack-nova-console, +6 more Red Hat OpenStack Platform 17.1 python3-nova, openstack-nova, openstack-nova-api, openstack-nova-common, openstack-nova-compute, openstack-nova-conductor, +5 more
    affected: no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 18.0 openstack-nova
    affected: no fix available “Fix deferred”
  • Red Hat OpenStack Platform 9.0 python-nova 13.1.4-24.el7ost, openstack-nova 13.1.4-24.el7ost, python-nova-tests 13.1.4-24.el7ost, openstack-nova-api 13.1.4-24.el7ost, openstack-nova-cert 13.1.4-24.el7ost, openstack-nova-cells 13.1.4-24.el7ost, +10 more
    fixed: vendor fix RHSA-2018:2855
  • Red Hat OpenStack Platform 10.0 python-nova 14.1.0-26.el7ost, openstack-nova 14.1.0-26.el7ost, python-nova-tests 14.1.0-26.el7ost, openstack-nova-api 14.1.0-26.el7ost, openstack-nova-cert 14.1.0-26.el7ost, openstack-nova-cells 14.1.0-26.el7ost, +11 more
    fixed: vendor fix RHSA-2018:2714
  • Red Hat OpenStack Platform 12.0 python-nova 16.1.4-6.el7ost, openstack-nova 16.1.4-6.el7ost, python-nova-tests 16.1.4-6.el7ost, openstack-nova-api 16.1.4-6.el7ost, openstack-nova-cells 16.1.4-6.el7ost, openstack-nova-common 16.1.4-6.el7ost, +10 more
    fixed: vendor fix RHSA-2018:2332
  • Red Hat OpenStack Platform 13 (Queens) 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

3.72% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • review.openstack.org https://review.openstack.org/539893 referenced PoC, tagged "exploit" by a source, unverified
  • launchpad.net https://launchpad.net/bugs/1739593 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi nova
>=15.0.0, <15.1.1
>=16.0.0, <16.1.2
15.1.1
16.1.2

References

Sources

Fencer Intel 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.