Moderate
1. Impacted Products
- VMware Horizon Server
- VMware Horizon Client for Windows
2. Introduction
Multiple vulnerabilities in VMware Horizon Server and Horizon Client for Windows were privately reported to VMware. Updates are available to remediate these vulnerabilities in affected VMware products.
3a. VMware Horizon Server Cross Site Scripting (XSS) vulnerability (CVE-2020-3997)
Description
VMware Horizon Server does not correctly validate user input. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 4.1.
Known Attack Vectors
Successful exploitation of this issue may allow an attacker to inject malicious script which will be executed.
Resolution
To remediate CVE-2020-3997 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 mobius07 for reporting this issue to us.
Response Matrix
| Product | Version | Running On | CVE Identifier | CVSSv3 | Severity | Fixed Version | Workarounds | Additional Documentation |
|
Horizon Server
|
7.x
|
Any
|
CVE-2020-3997
|
moderate
|
7.10.3 or 7.13.0
|
None
|
None
|
|
|
Horizon Server
|
8.x
|
N/A
|
N/A
|
N/A
|
N/A
|
Unaffected
|
N/A
|
N/A
|
3b. VMware Horizon Client for Windows information disclosure vulnerability (CVE-2020-3998)
Description
VMware Horizon Server does not correctly validate user input. VMware has evaluated the severity of this issue to be in the Low severity range with a maximum CVSSv3 base score of 3.3.
Known Attack Vectors
A malicious attacker with local privileges on the machine where Horizon Client for Windows is installed may be able to retrieve hashed credentials if the client crashes.
Resolution
To remediate CVE-2020-3998 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 Yann Souchon and Quentin 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-2020-3998
|
low
|
5.5.0
|
None
|
None
|
4. References
Fixed Version(s) and Release Notes:
Horizon Server
Downloads and Documentation:
https://docs.vmware.com/en/VMware-Horizon-7/index.html
Horizon Client for Windows 5.5.0
Downloads and Documentation:
https://my.vmware.com/en/web/vmware/downloads/details?downloadGroup=CART21FQ3_WIN_550&productId=863&rPId=53321
https://docs.vmware.com/en/VMware-Horizon-Client/index.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3997
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3998
FIRST CVSSv3 Calculator:
CVE-2020-3997 - https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
CVE-2020-3998 - https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
5. Change Log
2020-10-22 VMSA-2020-0024
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.