Buffer overflow in Parallels Desktop
CVE-2021-31420
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.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (35.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Parallels Desktop — versions 16.1.0-48950
- Parallels Parallels_desktop — versions 16.1.0-48950
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-2021-31420?
- CVE-2021-31420 is a high-severity vulnerability in Parallels Desktop, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2021-04-29.
- How severe is CVE-2021-31420?
- High severity. CVSS v3 base score is 8.8 out of 10.