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Security Bulletin: The PowerVM hypervisor can violate the isolation between peer VMs in certain scenarios

Security Bulletin


Summary

A specific sequence of VM management operations from the management console (HMC, Novalink, or PowerVC) can lead to a violation of the isolation between peer VMs.

Vulnerability Details

CVEID:   CVE-2021-38918
DESCRIPTION:   IBM PowerVM Hypervisor through a specific sequence of VM management operations could lead to a violation of the isolation between peer VMs.
CVSS Base score: 8.6
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/210019 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
PowerVM HypervisorFW860
PowerVM HypervisorFW1010
PowerVM HypervisorFW940
PowerVM HypervisorFW950

Remediation/Fixes

Customers with the products below should install FW860.A2(860_236), FW940.50(940_095), FW950.30(950_092), FW1010.01(1010_69) or newer to remediate this concern.

Power 8

1) IBM Power System S812 (8284-21A)

2) IBM Power System S822 (8284-22A)

3) IBM Power System S814 (8286-41A)

4) IBM Power System S824 (8286-42A)

5) IBM Power System E850 (8408-E8E)

6) IBM Power System E850C (8408-44E)

7) IBM Power System E870 (9119-MME)

8) IBM Power System E880 (9119-MHE)

9) IBM Power System E870C (9080-MME)

10) IBM Power System E880C (9080-MHE)

Power 9

1) IBM Power System S922 (9009-22A, 9009-22G)

2) IBM Power System H922 (9223-22H, 9223-22S)

3) IBM Power System S914 (9009-41A, 9009-41G)

4) IBM Power System S924 (9009-42A, 9009-42G)

5) IBM Power System H924 (9223-42H, 9223-42S)

6) IBM Power System E950 (9040-MR9)

7) IBM Power System E980 (9080-M98, 9080-M9S)

Power 10

1) IBM Power System E1080 (9080-HEX)

Workarounds and Mitigations

None

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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

Change History

02 Dec 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:
09 December 2021

UID

ibm16525032

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