CVE-2021-34855 — MEDIUM (6.5)

Vulnerability Description

This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 16.1.3 (49160). An attacker must first obtain the ability to execute low-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 initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13592.

CVSS Score

6.5

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Parallels	Parallels Desktop	16.1.3

Related Weaknesses (CWE)

CWE-908

References

https://kb.parallels.com/125013PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-939/Third Party AdvisoryVDB Entry
https://kb.parallels.com/125013PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-939/Third Party AdvisoryVDB Entry

FAQ

What is CVE-2021-34855?

CVE-2021-34855 is a vulnerability with a CVSS score of 6.5 (MEDIUM). This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 16.1.3 (49160). An attacker must first obtain the ability to execute low-priv...

How severe is CVE-2021-34855?

CVE-2021-34855 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-34855?

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