CVE-2021-20238 describes an authentication bypass vulnerability in OpenShift Container Platform 4, allowing external access to sensitive ignition configurations, including registry pull secrets, from the Machine Config Server (MCS) endpoint (port 22623). This affects Red Hat OpenShift Container Platform and OpenShift Machine Config Operator, particularly in baremetal, OpenStack, Ovirt, vSphere, and KubeVirt deployments, or cloud deployments using unsupported network plugins. The vulnerability has a CVSS score of 3.7 (LOW), indicating a network attack vector with high attack complexity and a potential for low confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.0CPE matchmatch criteria | cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* | ||
<= 4.9.0CPE matchmatch criteria | cpe:2.3:a:redhat:openshift_machine-config-operator:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.