What is CVE-2021-20198?

CVE-2021-20198 is a high-severity vulnerability in Red Hat Openshift Installer, classified under Missing Authentication for Critical Function. CVSS score: 8.1/10. Published 2021-02-23.

How severe is CVE-2021-20198?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Red Hat Openshift Installer

CVE-2021-20198

A flaw was found in the OpenShift Installer before version v0.9.0-master.0.20210125200451-95101da940b0. During installation of OpenShift Container Platform 4 clusters, bootstrap nodes are provisioned with anonymous authentication enabled on kubelet port 10250. A remote attacker able to reach this port during installation can make unauthenticated `/exec` requests to execute arbitrary commands within running containers. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Vulnerability class: Broken Authentication

EPSS: 0.018 (76.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Redhat Openshift_installer
N/a Openshift/installer — versions openshift/installer v0.9.0-master.0.20210125200451-95101da940b0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

secalert@redhat.com (Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20198?: CVE-2021-20198 is a high-severity vulnerability in Red Hat Openshift Installer, classified under Missing Authentication for Critical Function. CVSS score: 8.1/10. Published 2021-02-23.
How severe is CVE-2021-20198?: High severity. CVSS v3 base score is 8.1 out of 10.