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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-GTCOP910
8335-GTGOP910
8335-GTHOP920, OP930, OP940
8335-GTWOP910
8335-GTXOP940
9183-22XOP940
7063-CR2OP940

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.

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

The vulnerability was reported to IBM 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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

[{"Business Unit":{"code":"BU009","label":"Systems - Server"},"Product":{"code":"AC922","label":"Power 9 AC922"},"Component":"BMC","Platform":[{"code":"PF050","label":"BMC"}],"Version":"OP910, OP940","Edition":""}]

Document Information

Modified date:
02 December 2021

UID

ibm16495437

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