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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
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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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