Security Bulletin
Summary
Red Hat OpenShift on IBM Cloud is affected by a security vulnerability found in OpenSSH which could allow a remote attacker to execute arbitrary commands on the system with root privileges (CVE-2024-6387).
Vulnerability Details
Description: OpenSSH could allow a remote attacker to execute arbitrary code on the system, caused by a signal handler race condition. By sending a specially crafted request, an attacker could exploit this vulnerability to execute arbitrary code with root privileges on glibc-based Linux systems.
CVSS Base Score: 8.1
CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/296064 for more information
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Platforms: OpenSSH OpenSSH 8.5p1, OpenSSH OpenSSH 9.7p1
Affected Products and Versions
Red Hat OpenShift on IBM Cloud 4.14-4.14.32_1573_openshiftt_W
Red Hat OpenShift on IBM Cloud 4.13-4.13.44_1580_openshift_W
Remediation/Fixes
Updates for Red Hat OpenShift on IBM Cloud cluster worker nodes at versions 4.13 or later are available that fix this vulnerability. Customers must update worker nodes created before the fix was available to address the vulnerability. For details on updating worker nodes, see either the classic or VPC documentation, as appropriate. 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 one of the following patch levels or later, the cluster worker nodes have the fix:
4.13.45_1586_openshift_W
4.14.33_1576_openshift_W
4.15.23_1553_openshift_W
Customers running Red Hat OpenShift on IBM Cloud Service clusters at version 4.11 must upgrade to version 4.12. Please review the documentation before starting an upgrade since additional actions may be required.
Customers running Red Hat OpenShift on IBM Cloud Service clusters at version 4.10 must create a new cluster and deploy their apps to the new cluster.
Red Hat OpenShift on IBM Cloud Service 4.11 and earlier are no longer supported and version 4.12 is deprecated with end of support tentatively scheduled for 26 February 2025. See the Red Hat OpenShift on IBM Cloud Service version information and update actions documentation for more information about Kubernetes versions and version support policies.
Workarounds and Mitigations
- SSH root login is disabled
- Calico global network polices on public interfaces blocking port 22 access on all cluster worker nodes
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References
*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
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.
Document Location
Worldwide
Product Synonym
ROKS;
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Document Information
Modified date:
28 January 2025
UID
ibm17167587