Moderate
1. Impacted Products
- VMware Horizon DaaS (Horizon DaaS)
2. Introduction
A broken authentication vulnerability affecting VMware Horizon DaaS was privately reported to VMware. Updates are available to address this vulnerability in affected VMware product.
3. Broken authentication vulnerability (CVE-2020-3977)
Description
Horizon DaaS contains a broken authentication vulnerability due to a flaw in the way it handled the first factor authentication. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 6.3.
Known Attack Vectors
Successful exploitation of this issue may allow an attacker to bypass two-factor authentication process.
Note: In order to exploit this issue, an attacker must have a legitimate account on Horizon DaaS.
Resolution
To remediate CVE-2020-3977 apply the patches listed in the 'Fixed Version' column of the 'Response Matrix' below.
Workarounds
None.
Additional Documentation
None.
Notes
In order to exploit this issue, an attacker must have a legitimate account on Horizon DaaS.
Acknowledgements
VMware would like to thank David Roccasalva of Privasec for reporting this issue to us.
Response Matrix
| Product | Version | Running On | CVE Identifier | CVSSv3 | Severity | Fixed Version | Workarounds | Additional Documentation |
|
Horizon DaaS
|
9.x
|
Any
|
CVE-2020-3977
|
N/A
|
N/A
|
not affected
|
N/A
|
N/A
|
|
Horizon DaaS
|
7.x, 8.x
|
Any
|
CVE-2020-3977
|
moderate
|
None
|
None
|
**This update applies to 8.0.1 only. Please see the download link for more information.
4. References
Fixed Version(s) and Release Notes:
Horizon DaaS 8.0.1 Update 1
Downloads and Documentation:
https://my.vmware.com/web/vmware/downloads/details?downloadGroup=HORIZON_DAAS_801&productId=743&rPId=36148
https://docs.vmware.com/en/VMware-Horizon-DaaS/services/rn/Horizon-DaaS-801-Release-Notes.html#rollup
Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3977
FIRST CVSSv3 Calculator:
https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5. Change Log
2020-09-22 VMSA-2020-0021
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.