Security Bulletin: Red Hat OpenShift on IBM Cloud is affected by a CRI-O security vulnerability (CVE-2022-0532)

Summary

Red Hat OpenShift on IBM Cloud is affected by a security vulnerability in CRI-O that could allow a remote authenticated attacker to bypass security restrictions, caused by improper sysctls validation.

Vulnerability Details

CVEID: CVE-2022-0532
Description: CRI-O could allow a remote authenticated attacker to bypass security restrictions, caused by improper sysctls validation. By creating a pod with a “hostIPC” and “hostNetwork” kernel namespace, an attacker could exploit this vulnerability to apply sysctls from the list of “safe” sysctls for the cluster [0] to the host.
CVSS Base Score: 7.5
CVSS Temporal Score: <https://exchange.xforce.ibmcloud.com/vulnerabilities/219769&gt; for more information
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

Red Hat OpenShift on IBM Cloud 4.9-4.9.23_1530_openshift

Red Hat OpenShift on IBM Cloud 4.8-4.8.32_1548_openshift

Remediation/Fixes

Updates for Red Hat OpenShift on IBM Cloud cluster worker nodes at version 4.8 or later are available that fix this vulnerability. Customers must update worker nodes created before the fix was available to address the vulnerability. See updating worker nodes for details on updating worker nodes. To verify your cluster worker nodes have been updated, use the following IBM Cloud CLI command to confirm the currently running versions:

ibmcloud oc workers --cluster <cluster name or ID>

If the versions are at the following patch level or later, the cluster worker nodes have the fix:
4.9.25_1532_openshift
4.8.35_1550_openshift

Customers running Red Hat OpenShift on IBM Cloud clusters at version 4.7 must upgrade to version 4.8. Please review the documentation before starting an upgrade since additional actions may be required.

Customers running Red Hat OpenShift on IBM Cloud clusters at version 4.6 or earlier must create a new cluster and deploy their apps to the new cluster.

Red Hat OpenShift on IBM Cloud versions 4.7 and earlier are no longer supported. See the Red Hat OpenShift on IBM Cloud version information and update actions documentation for more information about OpenShift versions and version support policies.

Monitor IBM Cloud Status for Future Security Bulletins

Monitor the security notifications on the IBM Cloud Status page to be advised of future security bulletins.

References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Red Hat CVE-2022-0532

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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