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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.2386
                   VMWare ThinApp - Increased Privileges
                               14 July 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           VMware ThinApp
Publisher:         VMWare
Operating System:  Windows
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-22000  

Original Bulletin: 
   https://www.vmware.com/security/advisories/VMSA-2021-0015.html

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1. Impacted Products

VMware ThinApp

2. Introduction

A DLL hijacking vulnerability in VMware ThinApp was privately reported to VMware. Updates are available to remediate this vulnerability in affected VMware products.

3. VMware ThinApp update addresses a DLL hijacking vulnerability (CVE-2021-22000)

Description

VMware ThinApp contains a DLL hijacking vulnerability due to insecure loading of DLLs. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 6.8.

Known Attack Vectors

A malicious actor with non-administrative privileges may exploit this vulnerability to elevate privileges to administrator level on the Windows operating system having VMware ThinApp installed on it

Resolution

To remediate  CVE-2021-22000, apply the patches listed in the 'Fixed Version' column of the 'Resolution Matrix' found below. 

Workarounds

None.

Additional Documentation

None.

Notes

None.

Acknowledgements

VMware would like to thank Hou JingYi (@hjy79425575) of Qihoo 360 for reporting this issue to us.

Response Matrix
Product 	   Version 	Running On 	CVE Identifier 	CVSSv3 	Severity 	Fixed Version 	Workarounds 	Additional Documentation
VMware ThinApp 5.x      Windows     CVE-2021-22000  6.8     moderate    5.2.10          None            None

4. References

Fixed Version(s) and Release Notes:

https://my.vmware.com/en/web/vmware/downloads/info/slug/desktop_end_user_computing/vmware_thinapp/5_0

https://docs.vmware.com/en/VMware-ThinApp/5.2.10/rn/vmware_thinapp_5210_release_notes/index.html


Mitre CVE Dictionary Links:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22000


FIRST CVSSv3 Calculator:

https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L

5. Change Log

2021-07-13: VMSA-2021-0015

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