CVE-2023-37250 : What You Need to Know

A security vulnerability has been identified in Unity Parsec that could allow local attackers to escalate privileges. Here's what you need to know about CVE-2023-37250.

Understanding CVE-2023-37250

This section will provide an overview of the CVE-2023-37250 vulnerability in Unity Parsec.

What is CVE-2023-37250?

The CVE-2023-37250 vulnerability in Unity Parsec is a Time-of-Check Time-of-Use (TOCTOU) race condition that allows local attackers to escalate privileges to SYSTEM if Parsec was installed in "Per User" mode. The issue arises from Parsec Loader versions through 8, with Parsec Loader 9 being the fixed version.

The Impact of CVE-2023-37250

The impact of CVE-2023-37250 is the potential privilege escalation to SYSTEM level for local attackers who exploit the TOCTOU race condition in Unity Parsec.

Technical Details of CVE-2023-37250

In this section, we will delve into the technical details of the CVE-2023-37250 vulnerability.

Vulnerability Description

Unity Parsec's TOCTOU race condition allows the intentional launching of DLLs from a user-owned directory without proper integrity verification, leading to privilege escalation.

Affected Systems and Versions

The vulnerability affects Unity Parsec Loader versions through 8 when installed in "Per User" mode. Parsec Loader 9 has addressed this issue.

Exploitation Mechanism

Local attackers can exploit the TOCTOU race condition by manipulating DLLs in a user-owned directory to achieve privilege escalation.

Mitigation and Prevention

This section covers the steps to mitigate and prevent the CVE-2023-37250 vulnerability.

Immediate Steps to Take

Update Unity Parsec to version 9 to mitigate the vulnerability.
Avoid running Parsec in "Per User" mode to lower the risk of privilege escalation.

Long-Term Security Practices

Regularly monitor Unity Parsec for security updates and apply them promptly.
Conduct security assessments to identify and address potential vulnerabilities in Parsec installations.

Patching and Updates

Install security patches and updates released by Unity for Parsec to ensure that known vulnerabilities are addressed promptly.