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AUSCERT External Security Bulletin Redistribution
ESB-2019.4321
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)
15 November 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM OS Images for RedHat Enterprise System
Publisher: IBM
Operating System: Linux variants
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-11091 CVE-2018-12130 CVE-2018-12127
CVE-2018-12126
Reference: ASB-2019.0138
ESB-2019.4282
ESB-2019.4280
ESB-2019.4101
ESB-2019.3590
Original Bulletin:
https://www.ibm.com/support/pages/node/1107009
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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)
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
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
+--------------------------------------+----------+
|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/platformIBM 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.wssuid=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/platformIBM 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.wssuid=ibm10887959.
Get Notified about Future Security Bulletins
References
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