PT-2022-9172 · Red Hat · Openshift Container Platform 4

Sam Fowler · Published 2022-04-01 · Updated 2023-06-26 · CVE-2021-20238

Positive Technologies (AI Summary)

CVSS v2.0

4.3

Medium

Base vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

Name of the Vulnerable Software and Affected Versions OpenShift Container Platform 4 (affected versions not specified)

Description It was found that ignition config, served by the Machine Config Server, can be accessed externally from clusters without authentication. The MCS endpoint (port 22623) provides ignition configuration used for bootstrapping Nodes and can include some sensitive data, e.g. registry pull secrets. There are two scenarios where this data can be accessed. The first is on Baremetal, OpenStack, Ovirt, Vsphere and KubeVirt deployments which do not have a separate internal API endpoint and allow access from outside the cluster to port 22623 from the standard OpenShift API Virtual IP address. The second is on cloud deployments when using unsupported network plugins, which do not create iptables rules that prevent access to port 22623. In this scenario, the ignition config is exposed to all pods within the cluster and cannot be accessed externally.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authentication

Improper Authentication

Weakness Enumeration

CWE-306

CWE-287

Related Identifiers

CVE-2021-20238

Affected Products

Openshift Container Platform 4

References · 4

• https://bugzilla.redhat.com/show_bug.cgi?id=1926568 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-20238 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-20238 · Security Note
• https://t.me/cibsecurity/40054 · Telegram Post