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
Workarounds and Mitigations
Keep the management network separate from the public network.
Get Notified about Future Security Bulletins
References
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
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Document Information
Modified date:
02 December 2021
UID
ibm16495437