Security Bulletin: IBM Cloud Private is affected by a privilege escalation vulnerability in Kubernetes API server

Summary

IBM Cloud Private is affected by a security vulnerability in Kubernetes which in some cases can allow unauthorized access to the Kubernetes API Server and/or trusted user privilege escalation.

Vulnerability Details

CVEID: CVE-2018-1002105 DESCRIPTION: Kubernetes could allow a remote attacker to gain elevated privileges on the system, caused by the improper handling of requests in the API server. By sending a specially crafted proxy request directly to the backend, a remote attacker could exploit this vulnerability to establish a connection to create brokered services and deploy malicious code with elevated privileges.
CVSS Base Score: 9.8
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/153638&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM Cloud Private 3.1.1

IBM Cloud Private 3.1.0

IBM Cloud Private 2.1.0.3

IBM Cloud Private 2.1.0.2

Remediation/Fixes

Users should apply the patch appropriate to the IBM Cloud Private Version to upgrade Kubernetes

IBM Cloud Private 3.1.1 patch - Available in Fix Central

IBM Cloud Private 3.1.0 patch - Available in Fix Central

IBM Cloud Private 2.1.0.3 patch - Available in Fix Central

IBM Cloud Private 2.1.0.2 patch - Available in Fix Central

Workarounds and Mitigations

None