CVE-2021-34857

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 a write past the end of an allocated buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13601.

CVSS v3.0 8.8 HIGH
CVSS v2.0 4.6 MEDIUM

8.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

4.6^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.zerodayinitiative.com/advisories/ZDI-21-940/	Third Party Advisory VDB Entry
https://kb.parallels.com/125013	Patch Vendor Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:parallels:parallels_desktop:16.1.3:*:*:*:*:macos:*:*

Information

Published : 2021-10-25 10:15

Updated : 2021-10-27 10:47

NVD link : CVE-2021-34857

Mitre link : CVE-2021-34857

JSON object : View

CWE

CWE-787

Out-of-bounds Write

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Products Affected

parallels

parallels_desktop

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