What is CVE-2017-2637?

CVE-2017-2637 is a critical-severity vulnerability in [Unknown] Rhosp-Director, classified under Missing Authentication for Critical Function. CVSS score: 9.9/10. Published 2018-07-26.

How severe is CVE-2017-2637?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Auth bypass in [Unknown] Rhosp-Director

CVE-2017-2637

A design flaw issue was found in the Red Hat OpenStack Platform director use of TripleO to enable libvirtd based live-migration. Libvirtd is deployed by default (by director) listening on 0.0.0.0 (all interfaces) with no-authentication or encryption. Anyone able to make a TCP connection to any compute host IP address, including 127.0.0.1, other loopback interface addresses, or in some cases possibly addresses that have been exposed beyond the management interface, could use this to open a virsh session to the libvirtd instance and gain control of virtual machine instances or possibly take over the host.

Vulnerability class: Broken Authentication

Published 2018-07-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.046 (91.6th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.048 · newest: 0.046 · change: -0.002

Affected products

[Unknown] Rhosp-Director
Red Hat OpenStack — versions 7.0, 8, 9

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

access.redhat.com/errata/RHSA-2017:1546 (vendor-advisory, Vendor Advisory)
access.redhat.com/errata/RHSA-2017:1537 (vendor-advisory, Vendor Advisory)
bugzilla.redhat.com/show_bug.cgi (Mitigation, Issue Tracking, Vendor Advisory)
www.securityfocus.com/bid/98576 (VDB Entry, Third Party Advisory, vdb-entry)
wiki.openstack.org/wiki/OSSN/OSSN-0007 (Vendor Advisory)
access.redhat.com/solutions/3022771 (Mitigation, Vendor Advisory)
access.redhat.com/errata/RHSA-2017:1242 (vendor-advisory, Vendor Advisory)
access.redhat.com/errata/RHSA-2017:1504 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2017-2637?: CVE-2017-2637 is a critical-severity vulnerability in [Unknown] Rhosp-Director, classified under Missing Authentication for Critical Function. CVSS score: 9.9/10. Published 2018-07-26.
How severe is CVE-2017-2637?: Critical severity. CVSS v3 base score is 9.9 out of 10.