Security Bulletin: IBM OS Images for RedHat Enterprise System is vulnerable to Intel Microarchitectural Data Sampling (MDS) Vulnerabilites (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091)

Summary

Intel Microarchitectural Data Sampling (MDS) vulnerabilities identified in RedHat Linux used in OS Images for RedHat Enterprise System for Cloud Pak System formerly known as PureApplication System.

Vulnerability Details

CVEID:CVE-2019-11091
**DESCRIPTION:**Microarchitectural Data Sampling Uncacheable Memory (MDSUM): Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf
CVSS Base score: 3.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/160993 for the current score.
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:**Microarchitectural Fill Buffer Data Sampling (MFBDS): Fill buffers on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/160992 for the current score.
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:**Microarchitectural Load Port Data Sampling (MLPDS): Load ports on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/160991 for the current score.
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:**Microarchitectural Store Buffer Data Sampling (MSBDS): Store buffers on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/160990 for the current score.
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

Remediation/Fixes

For OS Image for RedHat Enterprise System deployed on IBM Cloud Pak System V2.2.5.0-V2.2.5.3, update OS Image by using "yum kernel update”.

Recommendation is to apply fix in test stage environment prior to production.

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

For OS Image for RedHat Enterprise System deployed on IBM Cloud Pak System V2.3.0, upgrade to V2.3.0.1.

Information on upgrading can be found here: http://www.ibm.com/support/docview.wss?uid=ibm10887959.

Workarounds and Mitigations

For OS Image for RedHat Enterprise System deployed on IBM Cloud Pak System V2.2.5.0-V2.2.5.3, update OS Image by using "yum kernel update”.

Recommendation is to apply fix in test stage environment prior to production.

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

For OS Image for RedHat Enterprise System deployed on IBM Cloud Pak System V2.3.0, upgrade to V2.3.0.1.

Information on upgrading can be found here: http://www.ibm.com/support/docview.wss?uid=ibm10887959.