What is CVE-2021-31428?

CVE-2021-31428 is a high-severity vulnerability in Parallels Desktop, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2021-04-29.

How severe is CVE-2021-31428?

High severity. CVSS v3 base score is 8.2 out of 10.

Buffer overflow in Parallels Desktop

CVE-2021-31428

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.5-47309. 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 IDE virtual device. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13186.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (36.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Parallels Desktop — versions 15.1.5-47309
Parallels Parallels_desktop — versions 15.1.5-47309

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

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-2021-31428?: CVE-2021-31428 is a high-severity vulnerability in Parallels Desktop, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2021-04-29.
How severe is CVE-2021-31428?: High severity. CVSS v3 base score is 8.2 out of 10.