PT-2021-17348 · Parallels · Parallels Desktop

Ezrak1E · Published 2021-02-24 · Updated 2022-09-27 · CVE-2021-27242

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 16.0.1-48919

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 Toolgate component. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this issue to escalate privileges and execute code in the context of the hypervisor.

Recommendations: For Parallels Desktop version 16.0.1-48919, consider disabling the Toolgate component as a temporary workaround until a patch is available. Restrict access to the Toolgate component to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-27242

ZDI-21-209

Affected Products

Parallels Desktop

References · 6

• https://zerodayinitiative.com/advisories/ZDI-21-209 · Security Note
• https://kb.parallels.com/en/125013 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27242 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27242 · Vendor Advisory
• https://t.me/cvenotify/29290 · Telegram Post
• https://t.me/cvenotify/36836 · Telegram Post