CVE-2021-20198

HIGH
8.1
CVSS Score
Published: February 23, 2021 at 05:45 PM UTC
Updated: June 17, 2026 at 03:33 AM UTC
1 product affected across 1 vendorOpenshift/installer

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Severity
HIGH8.1
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.9.0-master.0.20210125200451-95101da940b00.9.0-master.0.20210125200451-95101da940b0
Affected range stops below 0.9.0-master.0.20210125200451-95101da940b0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

x_refsource_MISCIssue TrackingPatchVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1920764

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-306

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