What is CVE-2021-31422?

CVE-2021-31422 is a high-severity vulnerability in Parallels Desktop, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2021-04-29.

How severe is CVE-2021-31422?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Parallels Desktop

CVE-2021-31422

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.1-49141. 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 e1000e virtual device. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-12527.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.003 (22.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Parallels Desktop — versions 16.1.1-49141
Parallels Parallels_desktop — versions 16.1.1-49141

Weakness classification (CWE)

References

zdi-disclosures@trendmicro.com (x_refsource_MISC, Vendor Advisory)
zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-31422?: CVE-2021-31422 is a high-severity vulnerability in Parallels Desktop, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2021-04-29.
How severe is CVE-2021-31422?: High severity. CVSS v3 base score is 7.5 out of 10.