Important

VMSA-2021-0013
7.8
2021-06-22
2021-06-22 (Initial Advisory)
CVE-2021-21999
VMware Tools, VMRC and VMware App Volumes update addresses a local privilege escalation vulnerability (CVE-2021-21999)

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1. Impacted Products
  • VMware Tools for Windows
  • VMware Remote Console for Windows (VMRC for Windows)
  • VMware App Volumes
2. Introduction

A local privilege escalation vulnerability in VMware Tools for Windows, VMRC for Windows and VMware App Volumes was privately reported to VMware. Updates are available to remediate this vulnerability in affected VMware products.

3. VMware Tools, VMRC and VMware App Volumes update addresses a local privilege escalation vulnerability (CVE-2021-21999)

Description

VMware Tools for Windows, VMRC for Windows and VMware App Volumes contain a local privilege escalation vulnerability. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 7.8.

Known Attack Vectors

An attacker with normal access to a virtual machine may exploit this issue by placing a malicious file renamed as `openssl.cnf' in an unrestricted directory which would allow code to be executed with elevated privileges.

Resolution

To remediate CVE-2021-21999 apply the patches listed in the 'Fixed Version' column of the 'Response Matrix' found below.

Workarounds

None.

Additional Documentation

None.

Notes

None.

Acknowledgements

VMware would like to thank Zeeshan Shaikh (@bugzzzhunter) from NotSoSecure working with Trend Micro Zero Day Initiative and Hou JingYi (@hjy79425575) of Qihoo 360 for reporting this vulnerability to us.

Response Matrix

Product Version Running On CVE Identifier CVSSv3 Severity Fixed Version Workarounds Additional Documentation
VMware Tools
11.3.0
Any
CVE-2021-21999
N/A
N/A
Unaffected
N/A
N/A
VMware Tools
11.x.y
Windows
CVE-2021-21999
7.8
important
11.2.6
None
None
VMware Tools
10.x.y
Any
CVE-2021-21999
N/A
N/A
Unaffected
N/A
N/A
VMRC for Windows
12.x
Windows
CVE-2021-21999
7.8
important
12.0.1
None
None
App Volumes
4
Windows
CVE-2021-21999
7.8
important
2103
None
None
App Volumes
2.x
Windows
CVE-2021-21999
7.8
important
2.18.10
None
None
4. References
5. Change Log

2021-06-22 VMSA-2021-0013
Initial security advisory.

6. Contact

E-mail list for product security notifications and announcements:

https://lists.vmware.com/cgi-bin/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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