CVE-2018-1085

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-06-15 · updated 2026-06-17
Weakness: CWE-592

Description

openshift-ansible before versions 3.9.23, 3.7.46 deploys a misconfigured etcd file that causes the SSL client certificate authentication to be disabled. Quotations around the values of ETCD_CLIENT_CERT_AUTH and ETCD_PEER_CLIENT_CERT_AUTH in etcd.conf result in etcd being configured to allow remote users to connect without any authentication if they can access the etcd server bound to the network on the master nodes. An attacker could use this flaw to read and modify all the data about the Openshift cluster in the etcd datastore, potentially adding another compute node, or bringing down the entire cluster.

Affected products

Red Hat OpenShift Container Platform 4.18: before 3.9.31 — fixed in 3.9.31

How to fix

Upgrade to a fixed version: Red Hat OpenShift Container Platform 4.18 3.9.31. Check the vendor advisory for mitigations.

References

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