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CVE-2025-6177: Privilege Escalation Vulnerability in MiniOS in Google ChromeOS

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Overview

This report covers the details of CVE-2025-6177, a high-severity privilege escalation vulnerability in MiniOS on Google ChromeOS. This vulnerability poses a significant threat to enrolled devices, potentially allowing a local attacker to gain root code execution. Addressing this issue is of paramount importance as it could lead to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-6177
Severity: High (CVSS 7.4)
Attack Vector: Local
Privileges Required: Low
User Interaction: Required
Impact: System Compromise and Potential Data Leakage

Affected Products

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Product | Affected Versions

Google ChromeOS | 16063.45.2 and potentially others

How the Exploit Works

The vulnerability lies in the debug shell (VT3 console) of MiniOS in Google ChromeOS. This debug shell is accessible through specific key combinations during the entry to developer mode and MiniOS access. An attacker can exploit this vulnerability to gain root code execution, even when the developer mode is blocked by device policy or Firmware Write Protect (FWMP).

Conceptual Example Code

This is a conceptual example of how the vulnerability might be exploited. In this case, the attacker would need physical access to the device to trigger the debug shell and root code execution:

# Attacker accesses the VT3 console
Ctrl+Alt+F2
# Attacker enters root shell
chronos
# Attacker exploits the vulnerability to gain root access
sudo /bin/bash

Mitigation Guidance

Users are advised to apply the vendor patch as soon as it becomes available. Until then, the use of Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) can serve as temporary mitigation. It’s also advised to restrict physical access to devices and disable unnecessary debug features.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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