PT-2021-17349 · Parallels · Parallels Desktop

Ezrak1E · Published 2021-02-24 · Updated 2021-04-01 · CVE-2021-27243

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. The flaw exists within the Toolgate component due to the lack of proper validation of user-supplied data, resulting in an integer overflow before allocating a buffer. This can be leveraged to escalate privileges and execute arbitrary code in the context of the hypervisor.

Recommendations: For Parallels Desktop version 16.0.1-48919, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2021-27243

ZDI-21-210

Affected Products

Parallels Desktop

References · 4

• https://zerodayinitiative.com/advisories/ZDI-21-210 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-27243 · Security Note
• https://kb.parallels.com/en/125013 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-27243 · Vendor Advisory