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Security Bulletin: This Power System update is being released to address CVE-2019-4169

Security Bulletin


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 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.


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".

Get Notified about Future Security Bulletins




The vulnerability was reported to IBM by Thilo Maurer.

*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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location


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Document Information

Modified date:
07 December 2021