Security Bulletin: A vulnerability has been identified in IBM Spectrum Scale where the use of Local Read Only Cache (LROC) may result in directory corruption and undetected data corruption in regular files.
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.
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 V22.214.171.124 thru V126.96.36.199
IBM Spectrum Scale V188.8.131.52 thru V184.108.40.206
IBM Spectrum Scale V220.127.116.11 thru V18.104.22.168
For IBM Spectrum Scale V22.214.171.124 thru 126.96.36.199, apply V188.8.131.52 available from FixCentral at:
For IBM Spectrum Scale V184.108.40.206 thru V220.127.116.11, apply V18.104.22.168 available from FixCentral at:
For IBM Spectrum Scale V22.214.171.124 (GPFS) thru V126.96.36.199, apply V188.8.131.52 available from FixCentral at:
If you cannot apply the latest level of service, contact IBM Service for an efix:
- For IBM Spectrum Scale V184.108.40.206 thru V220.127.116.11, reference APAR IJ10565
- For IBM Spectrum Scale V18.104.22.168 thru V22.214.171.124, reference APAR IJ10573
- For IBM Spectrum Scale V126.96.36.199 thru V188.8.131.52, 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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*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.
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
More support for:
IBM Spectrum Scale
Software version: 4.1.1, 4.2.0, 4.2.1, 4.2.2, 4.2.3, 5.0.0
Operating system(s): AIX, Linux
Reference #: 0793719
Modified date: 03 January 2019