CVE-2021-34856

Published on: 10/25/2021 12:00:00 AM UTC

Last Modified on: 10/27/2021 05:46:00 PM UTC

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Certain versions of Parallels Desktop from Parallels contain the following vulnerability:

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.3 (49160). An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the virtio-gpu virtual device. 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 vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13581.

  • CVE-2021-34856 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as HIGH severity.
  • Affected Vendor/Software: URL Logo Parallels - Desktop version 16.1.3 (49160)

CVSS3 Score: 8.8 - HIGH

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
LOCAL LOW LOW NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
CHANGED HIGH HIGH HIGH

CVSS2 Score: 4.6 - MEDIUM

Access
Vector
Access
Complexity
Authentication
LOCAL LOW NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL PARTIAL PARTIAL

CVE References

Description Tags Link
KB Parallels: Parallels Desktop Security Updates kb.parallels.com
text/html
URL Logo MISC kb.parallels.com/125013
ZDI-21-938 | Zero Day Initiative www.zerodayinitiative.com
text/html
URL Logo MISC www.zerodayinitiative.com/advisories/ZDI-21-938/

Related QID Numbers

  • 375792 Parallels Desktop Privilege Escalation Multiple Vulnerabilities(ZDI-CAN-13544,ZDI-CAN-13581,ZDI-CAN-13592,ZDI-CAN-13601)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationParallelsParallels Desktop16.1.3AllAllAll
  • cpe:2.3:a:parallels:parallels_desktop:16.1.3:*:*:*:*:macos:*:*:

Discovery Credit

Ben McBride

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-34856 : This vulnerability allows local attackers to escalate privileges on affected installations of Para… twitter.com/i/web/status/1… 2021-10-25 17:15:52
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