PT-2020-4395 · Vmware · Vmware Horizon Client

Published 2020-10-15 · Updated 2020-10-23 · CVE-2020-3991

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Name of the Vulnerable Software and Affected Versions: VMware Horizon Client for Windows versions 5.x before 5.5.0

Description: The issue is related to a denial-of-service condition due to a file system access control problem during installation. It may allow an attacker to overwrite certain admin privileged files through a symbolic link attack, resulting in a denial-of-service condition on the machine where the client is installed. The vulnerability is also associated with insufficient input validation.

Recommendations: For versions 5.x before 5.5.0, update to version 5.5.0 or later to resolve the issue. As a temporary workaround, consider restricting file system access during installation to minimize the risk of exploitation.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-04908

CVE-2020-3991

Affected Products

Vmware Horizon Client

References · 5

• https://vmware.com/security/advisories/VMSA-2020-0022.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-04908 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-3991 · Security Note
• https://osv.dev/vulnerability/CVE-2020-3991 · Vendor Advisory
• https://t.me/defcon_news/59430 · Telegram Post