Vulnerability · Published Apr 29, 2021 · Assigned by zdi
CVE-2021-31420
High 8.8
In plain English
A high-severity stack buffer overflow in Desktop from Parallels. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
Weakness: CWE-121 · Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- https://kb.parallels.com/en/125013 x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-428/ x_refsource_MISC