Security Bulletin
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
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)
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)
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)
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
| Affected Product(s) | Version(s) |
| IBM OS Image for Red Hat Linux Systems | 3.0.0.0 |
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.
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References
Change History
30 Oct 2019: Initial Publication
*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.
Document Location
Worldwide
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Document Information
Modified date:
06 May 2020
UID
ibm11107009