Low

VMSA-2022-0016
3.8
2022-06-14
2022-06-14 (Initial Advisory)
CVE-2022-21123, CVE-2022-21125, CVE-2022-21166
VMware ESXi addresses DirectPath I/O (PCI-Passthrough) Information Leak vulnerabilities (CVE-2022-21123, CVE-2022-21125, CVE-2022-21166)

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1. Impacted Products
  • VMware ESXi
  • VMware Cloud Foundation
2. Introduction

Intel has disclosed multiple side-channel vulnerabilities that impact VMware products running on Intel processors. Patches and advanced settings are available to mitigate these vulnerabilities in affected VMware products.

3. DirectPath I/O (PCI-Passthrough) Information Leak vulnerabilities (CVE-2022-21123, CVE-2022-21125, CVE-2022-21166)

Description

VMware ESXi contains information leak vulnerabilities when DirectPath I/O (PCI-Passthrough) is utilized. VMware has evaluated the severity of these issues to be in the Low severity range with a maximum CVSSv3 base score of 3.8.

Known Attack Vectors

A malicious actor with administrative access to a virtual machine that has an attached DirectPath I/O (PCI-Passthrough) device can take advantage of a flaw in memory-mapped I/O (MMIO) fill buffers that may leak information stored in physical memory about the hypervisor or other virtual machines that reside on the same ESXi host if the host utilizes Intel processors.

Resolution


To mitigate CVE-2022-21123, CVE-2022-21125, and CVE-2022-21166, apply the patches listed in the 'Fixed Version' column of the 'Resolution Matrix' found below and enable the VMkernel.Boot.forceHyperthreadingMitigation advanced setting documented in KB88632. This mitigation enables the SCAv2 scheduler and will impose the same performance impact that was previously documented.

Workarounds

None.

Additional Documentation

A supplemental FAQ was created for additional clarification.

Notes

None.

Acknowledgements

None.

Response Matrix:

Product Version Running On CVE Identifier CVSSv3 Severity Fixed Version Workarounds Additional Documentation
ESXi
7.0
Any
CVE-2022-21123, CVE-2022-21125, CVE-2022-21166
low
None
ESXi
6.7
Any
CVE-2022-21123, CVE-2022-21125, CVE-2022-21166
low
None
ESXi
6.5
Any
CVE-2022-21123, CVE-2022-21125, CVE-2022-21166
low
None

Impacted Product Suites that Deploy Response Matrix Components:

Product Version Running On CVE Identifier CVSSv3 Severity Fixed Version Workarounds Additional Documentation
Cloud Foundation (ESXi)
4.x
Any
CVE-2022-21123, CVE-2022-21125, CVE-2022-21166
low
Patch Pending
None
Cloud Foundation (ESXi)
3.x
Any
CVE-2022-21123, CVE-2022-21125, CVE-2022-21166
low
None
4. References
5. Change Log

2022-06-14: VMSA-2022-0016
Initial security advisory.

6. Contact

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bugtraq@securityfocus.com  

fulldisclosure@seclists.org 

 

E-mail: security@vmware.com

PGP key at:

https://kb.vmware.com/kb/1055 

 

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