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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0337 IBM Spectrum Scale for IBM Elastic Storage Server is affected by the use of Local Read Only Cache (LROC) which may result in directory corruption and undetected data corruption in regular files. 6 February 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Elastic Storage Server Publisher: IBM Operating System: Linux variants Impact/Access: Provide Misleading Information -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-1993 Original Bulletin: https://www.ibm.com/support/docview.wss?uid=ibm10794443 - --------------------------BEGIN INCLUDED TEXT-------------------- IBM Spectrum Scale for IBM Elastic Storage Server is affected by the use of Local Read Only Cache (LROC) which may result in directory corruption and undetected data corruption in regular files. Product: IBM Elastic Storage Server Software version: All Versions Operating system(s): Linux Reference #: 0794443 Security Bulletin Summary The Elastic Storage Server is affected by a vulnerability in IBM Spectrum Scale where 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 the invalidation of this LROC data to be skipped. This could lead to stale or incorrect data being recalled from LROC, with potential for the corruption of files and directories 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 The Elastic Storage Server 5.3 thru 5.3.1.1 The Elastic Storage Server 5.0.0 thru 5.2.4 The Elastic Storage Server 4.5.0 thru 4.6.0 The Elastic Storage Server 4.0.0 thru 4.0.6 Remediation/Fixes For IBM Elastic Storage Server V5.0.0. thru 5.3.1.1, apply V5.3.2.0 available from FixCentral at: https://www-945.ibm.com/support/fixcentral/swg/selectFixesparent= Software%20defined%20storage&product=ibm/StorageSoftware/ IBM+Elastic+Storage+Server+(ESS)&release=5.3.0&platform=All&function=all For IBM Elastic Storage Server V5.0.0. thru 5.2.4.0, apply V5.2.5 available from FixCentral at: https://www-945.ibm.com/support/fixcentral/swg/selectFixesparent= Software%20defined%20storage&product=ibm/StorageSoftware/ IBM+Elastic+Storage+Server+(ESS)&release=5.2.0&platform=All&function=all If you are unable to upgrade to ESS 5.3.2.0 or 5.2.5, please contact IBM Service to obtain an efix: - - For IBM Elastic Storage Server 5.3-5.3.1.1, reference APAR IJ10565 - - For IBM Elastic Storage Server 5.0 - 5.2.4.0, reference APAR IJ10573 - - For IBM Elastic Storage Server 4.0.0 - 4.6.0, 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 Elastic Storage Server code with a fix, you can avoid this vulnerability by not enabling Local Read Only (LROC) feature in IBM Spectrum Scale. Get Notified about Future Security Bulletins Subscribe to My Notifications to be notified of important product support alerts like this. Reference Complete CVSS v3 Guide On-line Calculator v3 Related Information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog *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 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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