CVE-2021-34867 — HIGH (8.2)

Vulnerability Description

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 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 vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13672.

CVSS Score

8.2

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Parallels	Parallels	16.1.3-49160

Related Weaknesses (CWE)

CWE-789

References

https://kb.parallels.com/125013Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1055/Third Party AdvisoryVDB Entry
https://kb.parallels.com/125013Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1055/Third Party AdvisoryVDB Entry

FAQ

What is CVE-2021-34867?

CVE-2021-34867 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 ...

How severe is CVE-2021-34867?

CVE-2021-34867 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-34867?

Check the references section above for vendor advisories and patch information. Affected products include: Parallels Parallels.