PT-2021-20712 · Parallels · Parallels Desktop

Reno Robert · Published 2021-09-08 · Updated 2022-01-31 · CVE-2021-34868

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 16.1.3-49160

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 an uncontrolled memory allocation. An attacker can leverage this issue to escalate privileges and execute arbitrary code in the context of the hypervisor.

Recommendations: For Parallels Desktop version 16.1.3-49160, consider disabling the Toolgate component until a patch is available. Restrict access to the Toolgate component to minimize the risk of exploitation. Avoid using user-supplied data in the affected component until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2021-34868

ZDI-21-1056

Affected Products

Parallels Desktop

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-34868 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-1056 · Security Note
• https://kb.parallels.com/125013 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34868 · Vendor Advisory
• https://t.me/cibsecurity/36240 · Telegram Post