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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0518 IBM Security Bulletin: This Power System update is being released to address CVE-2018-8931 20 February 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Power System Publisher: IBM Operating System: Network Appliance Impact/Access: Access Privileged Data -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-8931 Reference: ESB-2018.3166 ESB-2018.2889 ESB-2017.1624 ESB-2017.1388 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=ibm10869128 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: This Power System update is being released to address CVE-2018-8931 Document information More support for: Power 9 Systems Software version: OP910 Operating system(s): BMC, Firmware Reference #: 0869128 Modified date: 18 February 2019 Summary Power8/Power9: In response to a security bypass vulnerability, a new Power System firmware update is being released to address Common Vulnerabilities and Exposures issue number CVE-2018-8931. The P8 and P9 Processors have a "Self Boot Engine" (SBE) that is used to initialize the processor before Primary Boot Firmware takes over the IPL. The SBE's code is stored on two SBE Seeproms per processor. Code running as Host on a system has access to these SBE Seeproms prior to being write locked by host firmware and can theoretically corrupt the SBE code stored on them. Changes were made to negate this possible corruption. Vulnerability Details CVEID: CVE-2018-8931 DESCRIPTION: The AMD Ryzen, Ryzen Pro, and Ryzen Mobile processor chips have insufficient access control for the Secure Processor, aka RYZENFALL-1. CVSS Base Score: 6.0 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/ 140293 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H) The firmware update can be obtained from FixCentral by specifying the Product and fix level as specified in this Remediation section. Affected Products and Versions Firmware releases FW810, FW830, FW840, FW860 are affected - if in OPAL mode. P9 OpenPOWER release OP910 is affected. Remediation/Fixes Customers with the products below, install FW860.60 1) IBM Power System S812(8284-21A) 2) IBM Power System S822(8284-22A) 3) IBM Power System S814(8286-41A) 4) IBM Power System S824(8286-42A) 5) IBM Power System S812L(8247-21L) 6) IBM Power System S822L(8247-22L) 7) IBM Power System S824L(8247-42L) Customers with the products below running OP910, install the OP910.30 1) IBM Power System AC922 (8335-GTG) Note: After updating to the OP910.30 firmware level, it is necessary to do a manual check to validate that the SBE image is correct. Follow the steps in section "7.1 SBE Validation Steps " of the "description" to complete the check before trying to boot and use the system on the new firmware level. *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. Cross reference information Product Component Platform Version Edition Power 8 Systems Firmware FW810, FW830, FW840, FW860 - --------------------------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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXGzGLmaOgq3Tt24GAQjF6w/+MgfU3QsD3Cqsd/6nN8hucXljbLZ4Ujer kUW80s/+S4JsWD5b6Wec489r3QsUFsuOtxmdEacnw4c8InjqakQ6edXmEbyPdbxG bEQcqN9Ty8soSP2VSqe8E8ZVWI4jg5K0KTOrBfwtTkbUQelvzV5grjQgqTdbif4d dY/31tH/hOPk04LOMQGNTQ8RbQgTlOk8qWihlJovGuZaCfEJY8r0FhtFGD95LYVE 8kp65l2DrUX0kBOBSjAvuzpWxLSYNAUpf3oNlNxQ3tWbV17tH2gVZQApfqS+bDgv KP+pJIeftzB0wkOGOxEeqP1S8D+fwGyKVy+K4xq8OlbHvamMEV2Qu6yHepQhWKIL tp+5RuogYBGTnpnfS+9JGgfQv/IfAcQhUiE/ImWwKm+MXsQdb/53PHHyVHaKYRQN PwVaKJBmWboG0ZLaaQa7qzKC+AS5I3zw1PA5/oPx0iuE9eQ5y0xL6ODcM/WKQP1S sRTrwfqE8gqeyvEDnCnv48oxahuiapH0+idHXax+jVk7aCbRb8fcQdBSukp61B8c eMWTwNn+/F5OqqjHV59tbyBOxx2gMD6UcmbcuQFAxbqXpelTVtPehB1b8Qm8cXJQ JyTLnLi/wbqu/PabnULTFZL36wXLvnuQVncP7EFSltLL1Bp0mhQNFgxadFwPP9sD OGXaTVX++Dg= =HOjH -----END PGP SIGNATURE-----