CVE-2022-0097: Google Chrome DevTools RCE Vulnerability

CVE-2022-0097 Overview

CVE-2022-0097 is a sandbox escape vulnerability affecting Google Chrome's DevTools component. The inappropriate implementation in DevTools in Google Chrome prior to version 97.0.4692.71 allowed an attacker who convinced a user to install a malicious extension to potentially allow the extension to escape the sandbox via a crafted HTML page. This vulnerability represents a significant security risk as it undermines Chrome's fundamental security architecture designed to contain malicious code.

Critical Impact

Successful exploitation allows a malicious browser extension to escape Chrome's sandbox, potentially gaining access to system resources and executing arbitrary code outside the browser's protected environment.

Affected Products

• Google Chrome versions prior to 97.0.4692.71
• Fedora 34, 35, and 36 (via bundled Chrome packages)

Discovery Timeline

• 2022-01-04 - Google releases security patch in Chrome 97.0.4692.71
• 2022-02-12 - CVE CVE-2022-0097 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-0097

Vulnerability Analysis

This vulnerability stems from an inappropriate implementation within Chrome's DevTools functionality. The flaw creates a path for malicious browser extensions to break out of Chrome's sandbox—a critical security boundary designed to isolate web content and extensions from the underlying operating system.

The sandbox escape mechanism requires user interaction in the form of installing a malicious extension. Once installed, the extension can leverage the DevTools implementation flaw through a specially crafted HTML page to gain elevated privileges beyond what the extension should normally possess.

The attack requires network access to deliver the malicious content and depends on user interaction to install the compromised extension. The scope is changed, meaning the vulnerability impacts resources beyond its original security context—allowing attackers to potentially access confidential data, modify system files, or disrupt system availability outside the browser environment.

Root Cause

The root cause is classified as an inappropriate implementation issue within the DevTools component. While specific technical details have not been fully disclosed to protect users, the vulnerability exists in how DevTools handles certain operations when interacting with extensions. This implementation gap failed to properly enforce sandbox boundaries, creating an escape vector that malicious extensions could exploit.

Attack Vector

The attack vector operates through the network and requires user interaction:

1. Distribution: Attacker creates a malicious browser extension and distributes it (potentially through social engineering or compromised extension stores)
2. Installation: User is convinced to install the malicious extension
3. Trigger: The extension serves or navigates to a crafted HTML page designed to exploit the DevTools vulnerability
4. Escape: The vulnerability allows the extension to execute operations outside the sandbox boundary
5. Exploitation: Attacker gains access to system resources, potentially achieving code execution at the user's privilege level

The vulnerability mechanism involves the interaction between Chrome's extension APIs and DevTools. For technical implementation details, refer to the Chrome Bug Report #1117173 and the Chrome Blog Update documenting the security fix.

Detection Methods for CVE-2022-0097

Indicators of Compromise

• Unexpected browser extensions installed without user knowledge or consent
• Unusual DevTools activity or API calls from extension contexts
• Process spawning from Chrome that escapes expected sandbox boundaries
• Network connections initiated from extension processes to unknown command-and-control infrastructure

Detection Strategies

• Monitor for Chrome installations running versions below 97.0.4692.71
• Implement endpoint detection rules for unusual Chrome child process behavior
• Review installed browser extensions for unauthorized or suspicious entries
• Deploy behavioral analysis to detect sandbox escape attempts

Monitoring Recommendations

• Enable Chrome Enterprise reporting to track browser versions and extension inventories across the organization
• Configure SIEM alerts for Chrome process anomalies that indicate potential sandbox escapes
• Implement network monitoring for suspicious outbound connections from browser processes
• Regularly audit installed extensions against an organizational allowlist

How to Mitigate CVE-2022-0097

Immediate Actions Required

• Update Google Chrome to version 97.0.4692.71 or later immediately
• Audit all installed browser extensions and remove any that are unauthorized or suspicious
• Enable automatic updates for Chrome to ensure timely security patches
• Restrict extension installation to trusted sources only via enterprise policies

Patch Information

Google addressed this vulnerability in Chrome version 97.0.4692.71, released on January 4, 2022. The fix is included in the stable channel update documented in the Chrome Releases Blog. Fedora users should apply the relevant package updates announced through the Fedora Package Announcements for Fedora 34, 35, and 36.

Workarounds

• Disable or restrict browser extension installation via Chrome Enterprise policies until patching is complete
• Use ExtensionInstallBlocklist policy to prevent installation of untrusted extensions
• Enable Chrome's Enhanced Safe Browsing to provide additional protection against malicious extensions
• Consider implementing browser isolation solutions for high-risk users until updates are deployed

# Chrome Enterprise Policy Configuration Example
# Add to Chrome policy registry or managed preferences

# Block all extensions except those explicitly allowed
ExtensionInstallBlocklist = ["*"]

# Allow only specific trusted extensions by ID
ExtensionInstallAllowlist = ["extension_id_1", "extension_id_2"]

# Force automatic updates
AutoUpdateCheckPeriodMinutes = 60