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Security Bulletin: This Power System update is being released to address CVE 2021-39296

Security Bulletin


Summary

POWER9: In response to a security issue with BMC's IPMI LAN+ interface, a new Power System firmware update is being released to address Common Vulnerabilities and Exposures issue number CVE 2021-39296.

Vulnerability Details

CVEID:   CVE-2021-39296
DESCRIPTION:   OpenBMC could allow a remote attacker to bypass security restrictions, caused by improper authentication validation by the netipmid (IPMI lan+) interface. By sending specially-crafted IPMI messages, an attacker could exploit this vulnerability to bypass authentication and gain full control of the system.
CVSS Base score: 10
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/208988 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s) Version(s)
8335-GTC OP910
8335-GTG OP910
8335-GTH OP920, OP930, OP940
8335-GTW OP910
8335-GTX OP940
9183-22X OP940
7063-CR2 OP940

Remediation/Fixes

Customers with the products below running OP910, install OP910.51
1) IBM Power System AC922 (8335-GTG)
Customers with the products below running OP910, install OP910.52.C
1) IBM Power System AC922 (8335-GTC, 8335-GTW)
Customers with the products below running OP920, OP930 or OP940, install OP940.22
1) IBM Power System AC922 (8335-GTH, 8335-GTX)
Customers with the products below running OP940, install OP940.22
1) IBM Power System IC922 (9183-22X)
Customers with the products below running OP940, install OP940.11
1) IBM Power Hardware Management Console System Firmware (7063-CR2)

Workarounds and Mitigations

Keep the management network separate from the public network.

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

The vulnerability was reported by Anton Kachalov.

Change History

29 Sep 2021: Initial Publication

*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:
05 October 2021

UID

ibm16495437