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.
Exploit prediction scoring system (EPSS) score for CVE-2021-20198
Probability of exploitation activity in the next 30 days: 0.16%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 52 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-20198
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
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
Products affected by CVE-2021-20198
- cpe:2.3:a:redhat:openshift_installer:*:*:*:*:*:*:*:*