PT-2021-20709 · Parallels · Parallels Desktop

Grigoritchy + 1 · Published 2021-08-25 · Updated 2022-10-27 · CVE-2021-34864

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Parallels Desktop version 16.1.3

Description: This issue allows local attackers to escalate privileges on affected installations. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this issue. The specific flaw exists within the WinAppHelper component, resulting from the lack of proper access control. An attacker can leverage this issue to escalate privileges and execute arbitrary code in the context of the hypervisor.

Recommendations: For Parallels Desktop version 16.1.3, at the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2021-34864

ZDI-21-1000

Affected Products

Parallels Desktop

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-34864 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-1000 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34864 · Vendor Advisory
• https://t.me/cibsecurity/31167 · Telegram Post