CVE-2024-6101: Google Chrome V8 RCE Vulnerability

CVE-2024-6101 Overview

CVE-2024-6101 is an inappropriate implementation vulnerability in the V8 JavaScript engine used by Google Chrome prior to version 126.0.6478.114. This flaw allows a remote attacker to perform out-of-bounds memory access via a crafted HTML page. The vulnerability was rated as High severity by the Chromium security team.

Critical Impact
Remote attackers can exploit this V8 engine vulnerability to access memory outside intended boundaries, potentially leading to information disclosure, arbitrary code execution, or browser compromise through malicious web content.

Affected Products

Google Chrome versions prior to 126.0.6478.114
Chromium-based browsers using vulnerable V8 engine versions
Fedora Linux packages containing affected Chrome/Chromium builds

Discovery Timeline

June 20, 2024 - CVE-2024-6101 published to NVD
November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2024-6101

Vulnerability Analysis

This vulnerability stems from an inappropriate implementation within V8, Google Chrome's high-performance JavaScript and WebAssembly engine. V8 is responsible for compiling and executing JavaScript code, making it a critical attack surface for browser security. The flaw allows attackers to craft malicious HTML pages that trigger out-of-bounds memory access when processed by the vulnerable V8 engine.

Out-of-bounds memory access vulnerabilities in JavaScript engines are particularly dangerous because they can bypass browser sandbox protections and potentially allow attackers to read sensitive data from memory or achieve arbitrary code execution within the browser context. The network-based attack vector means victims only need to visit a malicious webpage for exploitation to occur.

Root Cause

The root cause is classified under CWE-358 (Improperly Implemented Security Check for Standard) and relates to improper security check implementation in the V8 engine. The vulnerability exists due to insufficient boundary validation when V8 processes certain JavaScript operations, allowing memory access beyond allocated buffers. This type of implementation flaw in the JavaScript engine can occur during JIT (Just-In-Time) compilation optimizations or during runtime execution of specially crafted scripts.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker must convince a victim to navigate to a malicious website containing specially crafted HTML and JavaScript code. When the victim's browser renders the page, the malicious code exploits the V8 implementation flaw to access memory outside of permitted boundaries.

The exploitation scenario typically involves:

Attacker creates a malicious webpage with crafted JavaScript
Victim visits the webpage using a vulnerable Chrome version
V8 engine processes the malicious JavaScript
Out-of-bounds memory access occurs during execution
Attacker gains unauthorized memory access, potentially leading to code execution

Since no verified code examples are available for this vulnerability, technical details can be found in the Chromium Issue Tracker Entry once the security restriction period has passed.

Detection Methods for CVE-2024-6101

Indicators of Compromise

Unexpected browser crashes or hangs when visiting specific websites
Chrome crash reports indicating V8 engine failures or memory access violations
Unusual JavaScript execution patterns detected by endpoint protection solutions
Memory corruption signatures in browser process dumps

Detection Strategies

Monitor for Chrome versions below 126.0.6478.114 across enterprise environments
Implement browser version compliance checking through endpoint management tools
Deploy web content filtering to block known malicious domains exploiting V8 vulnerabilities
Enable Chrome's enhanced protection mode for real-time threat detection

Monitoring Recommendations

Review Chrome crash telemetry for V8-related failures indicating potential exploitation attempts
Monitor network traffic for connections to suspicious domains serving crafted JavaScript payloads
Configure SIEM alerts for browser process anomalies such as unexpected memory access patterns
Track browser update compliance metrics to identify vulnerable installations

How to Mitigate CVE-2024-6101

Immediate Actions Required

Update Google Chrome to version 126.0.6478.114 or later immediately
Enable automatic Chrome updates to ensure timely security patches
Review and update Chromium-based browsers and applications that embed the V8 engine
Consider temporary isolation of systems that cannot be immediately updated

Patch Information

Google addressed this vulnerability in the Chrome stable channel update released on June 18, 2024. The fix is included in Chrome version 126.0.6478.114 and all subsequent releases. Detailed patch information is available in the Google Chrome Desktop Update announcement.

Fedora Linux users should apply the security updates announced in the Fedora package announcements to ensure their Chromium packages are updated to patched versions.

Workarounds

Use alternative browsers temporarily if Chrome cannot be updated immediately
Implement web filtering to block access to untrusted or suspicious websites
Enable Chrome's Site Isolation feature for additional process-level protection
Disable JavaScript on untrusted sites using browser extensions as a temporary measure

bash

# Verify Chrome version on Linux/macOS
google-chrome --version
# Expected output should be 126.0.6478.114 or higher

# Force Chrome update check (run Chrome with update flag)
google-chrome --check-for-update-interval=1