CVE-2022-0466: Google Chrome RCE Vulnerability

CVE-2022-0466 Overview

CVE-2022-0466 is a critical sandbox escape vulnerability affecting Google Chrome's Extensions Platform. The flaw stems from an inappropriate implementation that allows an attacker who has convinced a user to install a malicious extension to potentially escape the browser's sandbox through a crafted HTML page. This vulnerability undermines one of Chrome's core security mechanisms—the sandbox—which is designed to isolate potentially malicious web content from the underlying operating system.

Critical Impact

Successful exploitation enables attackers to escape Chrome's sandbox isolation, potentially gaining access to the underlying system with elevated privileges beyond the browser's confined environment.

Affected Products

• Google Chrome versions prior to 98.0.4758.80
• All platforms running vulnerable Chrome versions (Windows, macOS, Linux)
• Chromium-based browsers using affected codebase

Discovery Timeline

• 2022-02-01 - Google releases security patch in Chrome version 98.0.4758.80
• 2022-04-05 - CVE-2022-0466 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-0466

Vulnerability Analysis

This vulnerability exists in the Extensions Platform component of Google Chrome, which manages browser extension functionality. The inappropriate implementation allows a malicious extension to leverage a crafted HTML page to break out of Chrome's sandbox environment.

Chrome's sandbox architecture is a fundamental security boundary that restricts the privileges of rendered web content and extensions. When this boundary is compromised, an attacker can potentially execute code with elevated privileges outside the browser's confined environment, accessing system resources that should be protected from web-based threats.

The attack requires user interaction—specifically, convincing a user to install a malicious browser extension. Once installed, the extension can serve or load a specially crafted HTML page that exploits the implementation flaw to escape the sandbox.

Root Cause

The root cause is an inappropriate implementation in Chrome's Extensions Platform. While specific technical details are restricted (classified as NVD-CWE-noinfo), the vulnerability relates to how the Extensions Platform handles certain operations that should be confined within the sandbox boundary. This implementation gap creates a pathway for sandbox escape when processing malicious HTML content from a rogue extension.

Attack Vector

The attack proceeds through a network-based vector requiring user interaction:

1. Social Engineering Phase: The attacker must first convince a victim to install a malicious Chrome extension, potentially through phishing, fake extension stores, or by compromising legitimate extension update mechanisms.

2. Payload Delivery: Once installed, the malicious extension serves or directs the browser to load a specially crafted HTML page.

3. Sandbox Escape: The crafted HTML page exploits the inappropriate implementation in the Extensions Platform to break out of Chrome's sandbox isolation.

4. Post-Exploitation: With sandbox escape achieved, the attacker potentially gains access to the underlying operating system with elevated privileges, enabling further malicious activities such as data theft, persistence mechanisms, or lateral movement.

The vulnerability is particularly dangerous because it combines the inherent trust users place in browser extensions with a mechanism to bypass Chrome's most critical security boundary.

Detection Methods for CVE-2022-0466

Indicators of Compromise

• Unusual Chrome extension installations, particularly from unknown or untrusted sources
• Unexpected processes spawned by Chrome with elevated privileges or unusual parent-child process relationships
• Chrome extension directories containing suspicious or obfuscated JavaScript/HTML files
• Network traffic to known malicious domains associated with malicious extension campaigns

Detection Strategies

• Monitor for Chrome extensions installed from outside the official Chrome Web Store
• Implement endpoint detection rules to identify processes attempting to escape browser sandbox boundaries
• Deploy browser extension whitelisting policies to prevent unauthorized extension installations
• Analyze Chrome extension manifest files for excessive or suspicious permission requests

Monitoring Recommendations

• Enable Chrome's Enhanced Safe Browsing to help detect potentially malicious extensions
• Monitor system logs for unusual process creation patterns originating from Chrome processes
• Implement network monitoring to detect command-and-control traffic associated with browser-based attacks
• Use SentinelOne's behavioral AI to detect anomalous browser process activities indicative of sandbox escape attempts

How to Mitigate CVE-2022-0466

Immediate Actions Required

• Update Google Chrome to version 98.0.4758.80 or later immediately
• Audit all installed browser extensions and remove any that are unnecessary or from untrusted sources
• Implement enterprise browser management policies to control extension installations
• Educate users about the risks of installing browser extensions from untrusted sources

Patch Information

Google has addressed this vulnerability in Chrome version 98.0.4758.80, released in February 2022. The fix is documented in the Google Chrome Desktop Update. Organizations should ensure all Chrome installations are updated to this version or later. Technical details about the fix can be tracked via Chromium Bug Report #1115460.

Workarounds

• Disable or restrict browser extension installations through Chrome enterprise policies until patching is complete
• Implement application whitelisting to prevent unauthorized extension sideloading
• Use Chrome's built-in extension management to disable all non-essential extensions
• Consider using browser isolation solutions to contain potential browser-based attacks

# Chrome Enterprise Policy - Restrict Extension Installations
# Add to Chrome policy configuration (Windows Registry or macOS plist)
# Block all extensions except explicitly allowed ones

# Windows Registry path:
# HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome

# Set ExtensionInstallBlocklist to block all:
# ExtensionInstallBlocklist = ["*"]

# Set ExtensionInstallAllowlist for approved extensions only:
# ExtensionInstallAllowlist = ["approved_extension_id_1", "approved_extension_id_2"]