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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0623 IBM Security Bulletin: Vulnerability in the Linux kernel affects IBM SAN Volume Controller, IBM Storwize, IBM Spectrum Virtualize and IBM FlashSystem products (CVE-2018-5391) 28 February 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM SAN Volume Controller Publisher: IBM Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-5391 Reference: ESB-2018.3640 ESB-2018.3590 ESB-2018.3563 ESB-2018.3473 ESB-2018.3377 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=ibm10872368 - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability in the Linux kernel affects IBM SAN Volume Controller, IBM Storwize, IBM Spectrum Virtualize and IBM FlashSystem products (CVE-2018-5391) Product: SAN Volume Controller Operating system(s): Appliance Reference #: 0872368 Security Bulletin Summary A vulnerability in the Linux Kernel affects IBM SAN Volume Controller, IBM Storwize V7000, V5000, V3700 and V3500, IBM Spectrum Virtualize Software, IBM Spectrum Virtualize for Public Cloud and IBM FlashSystem V9000 and 9100 family products. Vulnerability Details CVEID: CVE-2018-5391 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by the improper handling of the reassembly of fragmented IPv4 and IPv6 packets by the IP implementation. By sending specially crafted IP fragments with random offsets, a remote attacker could exploit this vulnerability to exhaust all available CPU resources and cause a denial of service. CVSS Base Score: 7.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/ 148388 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) Affected Products and Versions IBM SAN Volume Controller IBM Storwize V7000 IBM Storwize V5000 IBM Storwize V3700 IBM Storwize V3500 IBM FlashSystem V9000 IBM FlashSystem 9100 Family IBM Spectrum Virtualize Software IBM Spectrum Virtualize for Public Cloud All products are affected when running supported version 7.5. Remediation/Fixes IBM recommends that you fix this vulnerability by upgrading affected versions of IBM SAN Volume Controller, IBM Storwize V7000, V5000, V3700 and V3500, IBM Spectrum Virtualize Software, IBM Spectrum Virtualize for Public Cloud and IBM FlashSystem V9000 and 9100 family to the following code levels or higher: 7.8.1.8 8.1.3.5 8.2.0.4 8.2.1.2 Latest IBM SAN Volume Controller Code Latest IBM Storwize V7000 Code Latest IBM Storwize V5000 Code Latest IBM Storwize V3700 Code Latest IBM Storwize V3500 Code Latest IBM FlashSystem V9000 Code Latest IBM FlashSystem 9100 Family Code Latest IBM Spectrum Virtualize Software Latest IBM Spectrum Virtualize for Public Cloud For unsupported versions of the above products, IBM recommends upgrading to a fixed, supported version of code. Workarounds and Mitigations Although IBM recommends that you install a level of code with a fix for this vulnerability, you can mitigate, although not eliminate, your risk until you have done so by ensuring that all users who have access to the system are authenticated by another security system such as a firewall. 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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXHdjMGaOgq3Tt24GAQjnfRAAlUBxY1HBndGtTOu7kq2QnjdDNaSEuG5r 4N8vvJDAH4X5Hm38k6tbnWOqTE1FXHRFNZBjlZaVPZYV31ehBldXzHgeAWd7U0TR NJSVJMfpQZ8xLDBLzBkwGhHnZ3TOZWsVjL5qYy81up9QpKnLtdP8rUsVwmClHMPs e7rZkDz2ubT6D3QgcfiPF5xdRnFYLT9QnXWQK94fJfmYaDR+tBueiIM/TaQDsb01 ANJP/1P0ZIRKKDnRHlFfX0ZvBTpE4pSLvEcKA3dc080DLgDIXlESGNssr9Ln2xNY MYoAFZlLkyc/7OSFPhorE61JiSZ656YvKe0VX/HYDNhilMr51TclXwRTML7ZE7w8 m5OajG/JWB4lTa2fwQ/0r26iu0krrjTjpuG2LEuMzwv0/EvtYu07oCBMxnOuapOd qaeLQBq8KSzhuuPBlilBCpx01G2sZrSczUj8UBX1BkB/20NHrIVAc3YEJfjEJJ9E 0Vx79bctdOdrOTWDJZdaGaD4EKdhVnpCt/vDnZJopq5EN/iw1UGAm0OsNfOncn8E DFPbFGpVKR024bRJXxkGeuEvhSKwpg43a5XtaV73s52zpzQssshZ5hOuMAfKDT1n KPO51Vukt2wEzN6EOLhlys9EnyrO+r/UJUCWX4Gx1u9PQ+WkdlNeH+kin49rE96w 5SNAsBlLWUY= =3/jM -----END PGP SIGNATURE-----