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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3217 Power System update addresses CVE-2019-4169 23 August 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Power 9 Systems Publisher: IBM Operating System: Network Appliance Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-4169 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=ibm10881209 - --------------------------BEGIN INCLUDED TEXT-------------------- This Power System update is being released to address CVE-2019-4169 Product: Power 9 Systems Software version: OP910, OP920 Operating system(s): BMC, Firmware Reference #: 0881209 Security Bulletin Summary POWER9: In response to an IPMI implementation error, a new Power System firmware update is being released to address Common Vulnerabilities and Exposures issue number CVE 2019-4169. Vulnerability Details CVEID: CVE-2019-4169 DESCRIPTION: IBM Open Power Firmware could allow access to BMC via IPMI using default OpenBMC password even after BMC password was changed away from the default password. CVSS Base Score: 8.1 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/ 158702 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N) 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 P9 OpenPOWER releases OP910 and OP920 are affected. Remediation/Fixes Customers with the products below running OP920, install the OP920.20 1) IBM Power System AC922 (8335-GTH) 2) IBM Power System AC922 (8335-GTX) Customers with the products below running OP910, install the OP910.31 1) IBM Power System AC922 (8335-GTC) 2) IBM Power System AC922 (8335-GTG) 3) IBM Power System AC922 (8335-GTW) Workarounds and Mitigations Disabling IPMI local area network (LAN) access via IPMI inband commands will mitigate the vulnerability until the fix can be applied. Run the following IPMI inband command to disable IPMI LAN access: "ipmitool lan set 1 access off". Run the following IPMI inband command to reenable IPMI LAN access: "ipmitool lan set 1 access on". Acknowledgement The vulnerability was reported to IBM by Thilo Maurer. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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). 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