Important

VMSA-2021-0025.1
7.1
2021-11-10
2021-11-15
CVE-2021-22048
VMware vCenter Server updates address a privilege escalation vulnerability (CVE-2021-22048)

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1. Impacted Products
  • VMware vCenter Server (vCenter Server)
  • VMware Cloud Foundation (Cloud Foundation)
2. Introduction

A privilege escalation vulnerability in VMware Center Server was privately reported to VMware. Workarounds are available to remediate this vulnerability in the affected VMware products.

3. VMware vCenter Server IWA privilege escalation vulnerability (CVE-2021-22048)

Description

The vCenter Server contains a privilege escalation vulnerability in the IWA (Integrated Windows Authentication) authentication mechanism. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 7.1.

Known Attack Vectors

A malicious actor with non-administrative access to vCenter Server may exploit this issue to elevate privileges to a higher privileged group. 

Resolution

None.

Workarounds

Workaround for CVE-2021-22048 is to switch to AD over LDAPS authentication OR Identity Provider Federation for AD FS (vSphere 7.0 only) from Integrated Windows Authentication (IWA) as documented in the KB listed in the 'Workarounds' column of the 'Response Matrix' below.

Additional Documentation

None.

Notes

None.

Acknowledgements

VMware would like to thank Yaron Zinar and Sagi Sheinfeld of Crowdstrike for reporting this issue to us.

Response Matrix

Product Version Running On CVE Identifier CVSSv3 Severity Fixed Version Workarounds Additional Documentation
vCenter Server
7.0
Any
CVE-2021-22048
important
Patch pending
None
vCenter Server
6.7
Any
CVE-2021-22048
important
Patch Pending
None
vCenter Server
6.5
Any
CVE-2021-22048
important
Patch Pending
None

Impacted Product Suites that Deploy Response Matrix Components:

Product Version Running On CVE Identifier CVSSv3 Severity Fixed Version Workarounds Additional Documentation
Cloud Foundation (vCenter Server)
4.x
Any
CVE-2021-22048
important
Patch pending
None
Cloud Foundation (vCenter Server)
3.x
Any
CVE-2021-22048
important
Patch Pending
None
4. References
5. Change Log

2021-11-10 VMSA-2021-0025
Initial security advisory.

 

2021-11-15 VMSA-2021-0025.1

Added vCenter Server 6.5 in the Response Matrix.

 

 

 

6. Contact

E-mail list for product security notifications and announcements:

https://lists.vmware.com/mailman/listinfo/security-announce 

 

This Security Advisory is posted to the following lists:  

security-announce@lists.vmware.com  

bugtraq@securityfocus.com  

fulldisclosure@seclists.org 

 

E-mail: security@vmware.com

PGP key at:

https://kb.vmware.com/kb/1055 

 

VMware Security Advisories

https://www.vmware.com/security/advisories 

 

VMware Security Response Policy

https://www.vmware.com/support/policies/security_response.html 

 

VMware Lifecycle Support Phases

https://www.vmware.com/support/policies/lifecycle.html 

 

VMware Security & Compliance Blog  

https://blogs.vmware.com/security 

 

Twitter

https://twitter.com/VMwareSRC

 

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