PT-2021-20702 · Parallels · Parallels Desktop

Jack Dates · Published 2021-08-03 · Updated 2021-10-28 · CVE-2021-34855

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

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

Description: This issue allows local attackers to disclose sensitive information 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 initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other issues 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

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

CVE-2021-34855

ZDI-21-939

Affected Products

Parallels Desktop

References · 6

• https://kb.parallels.com/125013 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-939 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-34855 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34855 · Vendor Advisory
• https://t.me/cibsecurity/31160 · Telegram Post
• https://t.me/cvenotify/22527 · Telegram Post