VMSA-2020-0021

Moderate

Advisory ID: VMSA-2020-0021

CVSSv3 Range: 6.3

Issue Date: 2020-09-22

Updated On: 2020-09-22 (Initial Advisory)

CVE(s): CVE-2020-3977

Synopsis: Horizon DaaS update addresses a broken authentication vulnerability (CVE-2020-3977)

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	6.3	moderate	8.0.1 Update 1**	None	None