CVE-2021-20198

HighCVSS 8.1/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-306

Affected software

Vendor	Product	Versions
n/a	openshift/installer	openshift/installer v0.9.0-master.0.20210125200451-95101da940b0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1920764Issue Tracking, Patch, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1920764Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Feb 23, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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