CVE-2024-10229: Google Chrome Auth Bypass Vulnerability

CVE-2024-10229 Overview

CVE-2024-10229 is a high-severity vulnerability affecting Google Chrome's Extensions component. This inappropriate implementation flaw allows a remote attacker to bypass site isolation protections via a specially crafted Chrome Extension. Site isolation is a critical security boundary in Chrome that prevents malicious websites from accessing data from other sites, making this bypass particularly concerning for enterprise environments and individual users alike.

Critical Impact

Remote attackers can bypass Chrome's site isolation security boundary through malicious extensions, potentially enabling cross-site data theft and unauthorized access to sensitive information from other browser contexts.

Affected Products

• Google Chrome versions prior to 130.0.6723.69
• All platforms running vulnerable Chrome versions (Windows, macOS, Linux)
• Chromium-based browsers that have not incorporated the security fix

Discovery Timeline

• October 22, 2024 - CVE-2024-10229 published to NVD
• October 25, 2024 - Last updated in NVD database

Technical Details for CVE-2024-10229

Vulnerability Analysis

This vulnerability stems from an inappropriate implementation in how Google Chrome handles Extensions interactions with site isolation mechanisms. Site isolation is designed to run each site in its own process, preventing malicious code from one site from accessing data belonging to another site. The flaw allows a crafted Chrome Extension to circumvent these protections, effectively breaking the security boundary that site isolation provides.

The attack requires user interaction—specifically, the victim must install or have installed a malicious extension. Once in place, the extension can exploit the implementation flaw to access cross-site data that should normally be protected by Chrome's process isolation architecture.

Root Cause

The root cause is an inappropriate implementation in the Chrome Extensions subsystem that fails to properly enforce site isolation boundaries. Extensions are granted elevated privileges within the browser, and this vulnerability represents a case where those privileges were not adequately constrained when interacting with site-isolated contexts.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker would need to:

1. Create a malicious Chrome Extension designed to exploit this implementation flaw
2. Distribute the extension through social engineering, malicious websites, or potentially by compromising legitimate extension distribution channels
3. Convince users to install the extension or exploit scenarios where extensions auto-update with malicious code
4. Once installed, the extension can bypass site isolation to access data from other origins

The vulnerability does not currently have known active exploits in the wild, and no exploit code has been publicly released. However, the technical details are tracked in the Chromium Issue Tracker Entry.

Detection Methods for CVE-2024-10229

Indicators of Compromise

• Unusual extension behavior accessing cross-origin data without legitimate reason
• Browser extensions with excessive permissions or suspicious permission requests
• Unexpected network traffic from browser processes attempting to access data across site boundaries
• Chrome extensions that were recently installed from untrusted sources

Detection Strategies

• Monitor installed Chrome extensions across the enterprise for unauthorized or suspicious additions
• Implement allowlisting policies for approved browser extensions
• Deploy endpoint detection solutions that can identify anomalous browser extension behavior
• Review browser telemetry for signs of cross-site data access violations

Monitoring Recommendations

• Enable Chrome browser management and extension reporting in enterprise environments
• Configure SentinelOne to monitor for suspicious browser process behavior and extension installations
• Audit Chrome extension installations regularly using browser management consoles
• Monitor for extensions requesting broad host permissions that could facilitate this attack

How to Mitigate CVE-2024-10229

Immediate Actions Required

• Update Google Chrome to version 130.0.6723.69 or later immediately
• Audit all installed browser extensions and remove any untrusted or unnecessary extensions
• Implement enterprise browser extension policies to restrict unauthorized extension installations
• Enable automatic updates for Chrome to ensure timely patching of future vulnerabilities

Patch Information

Google has addressed this vulnerability in Chrome version 130.0.6723.69. The security update was announced in the Google Chrome Desktop Update on October 22, 2024. Organizations should prioritize deploying this update across all managed endpoints.

Workarounds

• Restrict browser extension installations to approved extensions only using Chrome policies
• Disable or remove non-essential extensions until patching is complete
• Use browser isolation technologies for high-risk browsing activities
• Consider using Chrome's Enhanced Safe Browsing mode for additional protection

# Chrome Enterprise Policy Configuration Example
# Apply extension allowlist via Group Policy or Chrome management
# ExtensionInstallAllowlist: Only allow approved extension IDs
# ExtensionInstallBlocklist: Block all by default with "*"

# Registry path for Windows:
# HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome\ExtensionInstallBlocklist
# Set value "1" to "*" to block all extensions by default

# Then allowlist specific approved extensions:
# HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome\ExtensionInstallAllowlist
# Add approved extension IDs as numbered values