CVE-2017-18191

Exp

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.

Published: 2018-02-19 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-18191 is rated High Exploit Risk (77.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.89%). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.40% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2017-18191

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-18191

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.50% 3.89% +1.40%
2 2026-02-15 1.59% 2.50% +0.90%
3 2026-02-14 — 1.59% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-18191

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2017-18191

GitHub Security Advisory for CVE-2017-18191

GHSA-ffmh-r67w-m88f · Severity: high · Ecosystem: pip — OpenStack Nova Denial of service attack on the compute host

OS Trackers for CVE-2017-18191

vendor priority summary link
debian not yet assigned CVE-2017-18191 not yet assigned priority: Debian including 1 source packages (nova), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-18191
redhat medium — https://access.redhat.com/security/cve/CVE-2017-18191
suse medium CVE-2017-18191 severity moderate: SUSE including 15 source package names (openstack-nova-14.0.11~dev13-4.22.1, openstack-nova-api-14.0.11~dev13-4.22.1, …), 15 product×package rows across 1 product lines (SUSE OpenStack Cloud 7): Fixed 15. https://www.suse.com/security/cve/CVE-2017-18191/
ubuntu low CVE-2017-18191 low priority: Ubuntu including 1 source packages (nova), 14 status rows across 14 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, trusty, upstream, xenial): not-affected 10, released 3, DNE 1. https://ubuntu.com/security/CVE-2017-18191

Affected software / configurations for CVE-2017-18191

Vendor Product Version Raw CPE
openstack nova >= 15.0.0, <= 15.1.0 cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*
openstack nova >= 16.0.0, <= 16.1.1 cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*
redhat openstack 9 cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:*
redhat openstack 10 cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*
redhat openstack 12 cpe:2.3:a:redhat:openstack:12:*:*:*:*:*:*:*

References for CVE-2017-18191

URL Tags
http://openwall.com/lists/oss-security/2018/04/20/3 Mailing List Patch Third Party Advisory
http://www.securityfocus.com/bid/103104 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:2332 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2714 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2855 Third Party Advisory
https://launchpad.net/bugs/1739593 Exploit Issue Tracking Third Party Advisory
https://review.openstack.org/539893 Exploit Patch Third Party Advisory
https://security.openstack.org/ossa/OSSA-2018-001.html Patch Vendor Advisory
cvelogic Threat Intelligence