Important
1. Impacted Products
- VMware Horizon Client for Windows
2. Introduction
A privilege escalation vulnerability affecting VMware Horizon Client for Windows was privately reported to VMware. Updates are available to address this vulnerability in affected VMware products.
3. VMware Horizon Client for Windows privilege escalation vulnerability
Description
VMware Horizon Client for Windows contains a privilege escalation vulnerability due to folder permission configuration and unsafe loading of libraries. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 8.4.
Known Attack Vectors
A local user on the system where the software is installed may exploit this issue to run commands as any user.
Resolution
To remediate CVE-2020-3961 apply the patches listed in the 'Fixed Version' column of the 'Response Matrix' below.
Workarounds
None.
Additional Documentation
None.
Notes
None.
Acknowledgements
VMware would like to thank Nuttakorn Tungpoonsup and Ammarit Thongthua of Secure D Center Research Team, Secure D Center Co.,Ltd. and Cybersecurity Researcher, Sittikorn Sangrattanapitak for reporting this issue to us.
Response Matrix
| Product | Version | Running On | CVE Identifier | CVSSv3 | Severity | Fixed Version | Workarounds | Additional Documentation |
|
Horizon Client for Windows
|
5.x and prior
|
Windows
|
CVE-2020-3961
|
important
|
5.4.3
|
None
|
None
|
4. References
Fixed Version(s) and Release Notes:
VMware Horizon Client 5.4.3
Downloads and Documentation:
https://my.vmware.com/web/vmware/info/slug/desktop_end_user_computing/vmware_horizon_clients/5_0
https://docs.vmware.com/en/VMware-Horizon-Client/index.html
Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3961
FIRST CVSSv3 Calculator:
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
5. Change Log
2020-06-09 VMSA-2020-0013
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
E-mail: security@vmware.com
PGP key at:
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
Copyright 2020 VMware Inc. All rights reserved.