VMSA-2021-0006

Important

Advisory ID:
VMSA-2021-0006

CVSSv3 Range:
7.5

Issue Date:
2021-04-19

Updated On:
2021-04-19 (Initial Advisory)

CVE(s):
CVE-2021-21981

Synopsis:
VMware NSX-T updates address a privilege escalation vulnerability (CVE-2021-21981)

1. Impacted Products

VMware NSX-T

2. Introduction

A privilege escalation vulnerability in VMware NSX-T was privately reported to VMware. Updates are available to remediate this vulnerability in affected VMware product.

3. Privilege escalation vulnerability (CVE-2021-21981)

Description

VMware NSX-T contains a privilege escalation vulnerability due to an issue with RBAC (Role based access control) role assignment. VMware has evaluated this issue to be ‘Important’ severity with a maximum CVSSv3 base score of 7.5.

Known Attack Vectors

Successful exploitation of this issue may allow attackers with local guest user account to assign privileges higher than their own permission level. 

Resolution

To remediate CVE-2021-21981 apply the patches listed in the ‘Fixed Version’ column of the ‘Response Matrix’ found below.

Workarounds

Workarounds for CVE-2021-21981 have been listed in the ‘Workarounds’ column of the ‘Response Matrix’ below.

Additional Documentation

None.

Notes

[1] To exploit this issue, NSX Enterprise administrator must activate the local guest user account. It is not activated by default. [2] This issue affects only version 3.1.1. Other versions are not affected.

Acknowledgements

None.

Response Matrix

Product
Version
Running On
CVE Identifier
CVSSv3
Severity
Fixed Version
Workarounds
Additional Documentation

NSX-T [1]

3.1.1 [2]

Any

CVE-2021-21981

7.5

important

3.1.2

KB83047

None

4. References

VMware NSX-T 3.1.2 Downloads and Documentation:https://my.vmware.com/en/web/vmware/downloads/details?downloadGroup=NSX-T-312&productId=982&rPId=64728https://docs.vmware.com/en/VMware-NSX-T-Data-Center/index.html
 
Mitre CVE Dictionary Links:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21981
 
FIRST CVSSv3 Calculator: CVE-2021-21981: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

5. Change Log

2021-04-19 VMSA-2021-0006 Initial security advisory.

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

 
Copyright 2021 VMware Inc. All rights reserved.  VMware Security AdvisoryRead More