Security Bulletin
Summary
After cached data is moved from memory to the LROC device, any changes to that data should trigger invalidation of the data stored in LROC. Due to a problem with invalidation logic, it is possible for invalidation of this LROC data to be skipped. This could lead to stale or incorrect data to be recalled from LROC and data in memory to become corrupted, with potential for the data on disks to also become corrupted.
Vulnerability Details
CVEID: CVE-2018-1993
DESCRIPTION: IBM Spectrum Scale (GPFS) where the use of Local Read Only Cache (LROC) is enabled may caused read operation on a file to return data from a different file.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/154440 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions
IBM Spectrum Scale V5.0.0.0 thru V5.0.2.0
IBM Spectrum Scale V4.2.0.0 thru V4.2.3.11
IBM Spectrum Scale V4.1.1.0 thru V4.1.1.21
Remediation/Fixes
For IBM Spectrum Scale V5.0.0.0 thru 5.0.2.0, apply V5.0.2.1 available from FixCentral at:
https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=5.0.2&platform=All&function=all
For IBM Spectrum Scale V4.2.0.0 thru V4.2.3.11, apply V4.2.3.12 available from FixCentral at:
https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=4.2.3&platform=All&function=all
For IBM Spectrum Scale V4.1.0.0 (GPFS) thru V4.1.1.21, apply V4.1.1.22 available from FixCentral at:
https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%2Bdefined%2Bstorage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=4.1.1&platform=All&function=all
If you cannot apply the latest level of service, contact IBM Service for an efix:
- For IBM Spectrum Scale V5.0.0.0 thru V5.0.2.0, reference APAR IJ10565
- For IBM Spectrum Scale V4.2.0.0 thru V4.2.3.11, reference APAR IJ10573
- For IBM Spectrum Scale V4.1.1.0 thru V4.1.1.21, reference APAR IJ11409
To contact IBM Service, see http://www.ibm.com/planetwide/
Workarounds and Mitigations
Work-around : Although IBM recommends that you install a level of IBM Spectrum Scale code with a fix, you can avoid this vulnerability by not enabling Local Read Only (LROC) feature in IBM Spectrum Scale.
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References
*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.
Internal Use Only
PR - 127498
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Document Information
Modified date:
03 January 2019
UID
ibm10793719