PT-2021-19302 · Parallels · Parallels Desktop

Published 2021-04-21 · Updated 2021-05-10 · CVE-2021-31422

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Parallels Desktop version 16.1.1-49141

Description This issue allows local attackers to escalate privileges on affected installations. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this issue. The specific flaw exists within the e1000e virtual device, resulting from the lack of proper locking when performing operations on an object. An attacker can leverage this issue to escalate privileges and execute arbitrary code in the context of the hypervisor.

Recommendations For Parallels Desktop version 16.1.1-49141, at the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Time Of Check To Time Of Use

Improper Locking

Weakness Enumeration

CWE-367

CWE-667

Related Identifiers

CVE-2021-31422

ZDI-21-430

Affected Products

Parallels Desktop

References · 4

• https://kb.parallels.com/en/125013 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31422 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-430 · Security Note
• https://osv.dev/vulnerability/CVE-2021-31422 · Vendor Advisory