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

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".

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

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.

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.

Document Location

Worldwide

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Document Information

Modified date:
20 May 2020

UID

ibm10881209