Vulnerability Details : 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.
Products affected by CVE-2021-20198
- cpe:2.3:a:redhat:openshift_installer:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20198
0.56%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 66 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20198
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.1
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
5.9
|
NIST |
CWE ids for CVE-2021-20198
-
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.Assigned by: secalert@redhat.com (Primary)
References for CVE-2021-20198
-
https://bugzilla.redhat.com/show_bug.cgi?id=1920764
1920764 – (CVE-2021-20198) CVE-2021-20198 openshift/installer: Bootstrap nodes allow anonymous authentication on kubelet port 10250Issue Tracking;Patch;Vendor Advisory
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