This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.0-48950. 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 validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-12220.
Published 2021-04-29 17:15:09
Updated 2021-05-06 19:11:40
View at NVD,   CVE.org
Vulnerability category: Execute code

Products affected by CVE-2021-31420

Exploit prediction scoring system (EPSS) score for CVE-2021-31420

0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 24 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-31420

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.6
MEDIUM AV:L/AC:L/Au:N/C:P/I:P/A:P
3.9
6.4
NIST
8.8
HIGH CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
2.0
6.0
Zero Day Initiative
8.8
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
2.0
6.0
NIST

CWE ids for CVE-2021-31420

  • A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
    Assigned by: zdi-disclosures@trendmicro.com (Primary)

References for CVE-2021-31420

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