Security Bulletin: Microarchitectural Data Sampling (MDS) Vulnerabilites affect OS Image for RedHat Linux for IBM Cloud Pak System

Summary

Microarchitectural Data Sampling (MDS) Vulnerabilities affect OS Image for RedHat Linux for IBM Cloud Pak System formerly known as IBM PureApplication System. OS image for Red Hat Linux Systems for Cloud Pak System based deployments have addressed the vulnerabilities.

Vulnerability Details

CVEID: CVE-2019-11091 DESCRIPTION: Intel Microprocessor could allow a local authenticated attacker to obtain sensitive information, caused by a Microarchitectural Data Sampling Uncacheable Memory (MDSUM) vulnerability that allows uncacheable memory on some microprocessors utilizing speculative execution. An attacker could exploit this vulnerability using a side-channel attack to obtain data that is being processed in the CPU by other apps. Note: This is called the Zombieload attack.
CVSS Base Score: 3.8
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/160993&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N)

CVEID: CVE-2018-12130 DESCRIPTION: Intel Microprocessor could allow a local authenticated attacker to obtain sensitive information, caused by a Microarchitectural Data Sampling (MDS) vulnerability that fills buffers on some microprocessors utilizing speculative execution. An attacker could exploit this vulnerability using a side-channel attack to obtain data that is being processed in the CPU by other apps. Note: This is called the Zombieload attack.
CVSS Base Score: 6.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/160992&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)

CVEID: CVE-2018-12127 DESCRIPTION: Intel Microprocessor could allow a local authenticated attacker to obtain sensitive information, caused by a Microarchitectural Data Sampling (MDS) vulnerability that fills buffers on some microprocessors utilizing speculative execution. An attacker could exploit this vulnerability using a side-channel attack to obtain data that is being processed in the CPU by other apps. Note: This is called the Zombieload attack.
CVSS Base Score: 6.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/160991&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)

CVEID: CVE-2018-12126 DESCRIPTION: Intel Microprocessor could allow a local authenticated attacker to obtain sensitive information, caused by a Microarchitectural Data Sampling (MDS) vulnerability that stores buffers on some microprocessors utilizing speculative execution. An attacker could exploit this vulnerability using a side-channel attack to obtain data that is being processed in the CPU by other apps. Note: This is called the Zombieload attack.
CVSS Base Score: 6.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/160990&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)

Affected Products and Versions

OS Image for Red Hat Linux Systems 3.0.8.0
OS Image for Red Hat Linux Systems 3.0.9.0
OS Image for Red Hat Linux Systems 3.0.10

Remediation/Fixes

For OS Image for Red Hat Linux Systems for IBM Cloud Pak System V2.2.5-2.2.6

- make sure to access via _ssh _your VMs and run yum update kernel command. The VM should be connected to the satellite server to download new kernel packages from the repository.

Notice. Before updating the production environment, work on your pattern instances on a test environment to make sure everything works after kernel update.

For OS Image for Red Hat Linux Systems forIBM Cloud Pak System V2.3.0.0 upgrade to the following fix pack :

IBM CloudPak System V2.3.0.1.

As for OS Image apply the Linux fixes as available at IBM Fix Central.

For unsupported versions/release/ platform IBM recommends upgrading to a fixed, supported version of the product. Contact IBM Cloud Pak System support for assistance.

Information on upgrading can be found here:<https://www.ibm.com/support/pages/node/887959/latest&gt;