CVE-2024-3156: Google Chrome V8 RCE Vulnerability

CVE-2024-3156 Overview

CVE-2024-3156 is a high-severity vulnerability affecting Google Chrome's V8 JavaScript engine. The vulnerability stems from an inappropriate implementation in V8 that allows a remote attacker to potentially perform out-of-bounds memory access via a crafted HTML page. This flaw was classified by Chromium security with a High severity rating.

V8 is the JavaScript and WebAssembly engine powering Google Chrome and other Chromium-based browsers. Out-of-bounds memory access vulnerabilities in V8 are particularly dangerous as they can potentially lead to information disclosure, code execution, or browser sandbox escapes when exploited in conjunction with other vulnerabilities.

Critical Impact

Remote attackers can exploit this vulnerability to perform out-of-bounds memory access, potentially leading to sensitive data exposure, arbitrary code execution, or browser compromise through maliciously crafted web pages.

Affected Products

• Google Chrome versions prior to 123.0.6312.105
• Chromium-based browsers using vulnerable V8 engine versions
• Fedora Linux packages containing affected Chrome versions

Discovery Timeline

• 2024-04-06 - CVE-2024-3156 published to NVD
• 2025-11-04 - Last updated in NVD database

Technical Details for CVE-2024-3156

Vulnerability Analysis

This vulnerability is classified under CWE-125 (Out-of-Bounds Read), indicating a memory safety issue within Chrome's V8 JavaScript engine. The flaw occurs due to inappropriate implementation in V8's memory handling routines, allowing crafted JavaScript code embedded in HTML pages to trigger out-of-bounds memory access operations.

The attack requires user interaction—specifically, a victim must navigate to or be redirected to a malicious web page containing the exploit payload. Once triggered, the vulnerability can read memory beyond the intended buffer boundaries, potentially exposing sensitive information or causing memory corruption that could be leveraged for further exploitation.

Given the network-based attack vector with low complexity and no privileges required, this vulnerability poses significant risk to users browsing untrusted websites. The potential for high impact on confidentiality, integrity, and availability makes this a serious security concern that warrants immediate patching.

Root Cause

The root cause of CVE-2024-3156 lies in an inappropriate implementation within V8's memory management code. V8 performs complex Just-In-Time (JIT) compilation and optimization of JavaScript code, which requires careful bounds checking during memory operations. The flaw indicates that certain code paths in V8 failed to properly validate memory access boundaries before performing read operations, allowing specially crafted JavaScript to access memory regions outside allocated buffers.

Attack Vector

The attack vector for CVE-2024-3156 is network-based and requires user interaction. An attacker would craft a malicious HTML page containing JavaScript designed to trigger the vulnerable code path in V8. The exploitation scenario typically follows this pattern:

1. Attacker hosts or injects malicious JavaScript into a web page
2. Victim navigates to the malicious page or is redirected via phishing, malvertising, or compromised websites
3. The browser's V8 engine processes the crafted JavaScript
4. The inappropriate implementation allows out-of-bounds memory access
5. Attacker gains access to sensitive memory contents or achieves code execution

The vulnerability can be triggered through various delivery mechanisms including compromised websites, malicious advertisements, phishing emails with links, or watering hole attacks targeting specific user groups.

Detection Methods for CVE-2024-3156

Indicators of Compromise

• Unusual browser crashes or instability when visiting specific websites
• Unexpected memory consumption spikes in Chrome renderer processes
• JavaScript errors related to ArrayBuffer or TypedArray operations in browser console logs
• Network connections to suspicious domains following browser activity
• Chrome crash reports indicating V8-related memory access violations

Detection Strategies

• Monitor Chrome version inventory across the organization and flag systems running versions prior to 123.0.6312.105
• Implement web content filtering to block access to known malicious domains hosting V8 exploits
• Deploy endpoint detection and response (EDR) solutions capable of detecting anomalous browser process behavior
• Review browser crash dumps for V8-related memory corruption signatures
• Utilize network security monitoring to identify suspicious JavaScript delivery patterns

Monitoring Recommendations

• Enable Chrome's built-in crash reporting to identify potential exploitation attempts
• Monitor endpoint telemetry for unusual Chrome process behavior including memory anomalies
• Track access to untrusted or newly registered domains that could serve exploit payloads
• Implement logging for browser extension installations and JavaScript execution policies
• Configure SIEM alerts for patterns consistent with browser-based exploitation attempts

How to Mitigate CVE-2024-3156

Immediate Actions Required

• Update Google Chrome to version 123.0.6312.105 or later immediately across all managed systems
• Enable automatic updates in Chrome to ensure timely patching of future vulnerabilities
• Verify Chromium-based browsers (Edge, Brave, Opera, etc.) are also updated to patched versions
• Implement browser isolation technologies for high-risk users accessing untrusted web content
• Consider temporarily restricting access to untrusted websites until patching is complete

Patch Information

Google has released a security update addressing this vulnerability in Chrome version 123.0.6312.105. The fix is documented in the Chrome Releases Blog Post. Additional technical details regarding the issue can be found in the Chromium Issue Tracker Entry.

For Fedora Linux users, updated packages have been released through the Fedora package announcement channels. Ensure your package manager is configured to receive and apply these security updates.

Workarounds

• Enable site isolation in Chrome to limit the impact of potential V8 exploits
• Use browser extensions that block JavaScript execution on untrusted sites (e.g., NoScript)
• Configure enterprise policies to restrict Chrome functionality on sensitive systems
• Implement network-level filtering to block access to known malicious domains
• Consider using alternative browsers temporarily until patching is complete on critical systems

# Verify Chrome version on Linux/macOS
google-chrome --version

# Force Chrome update check
# Navigate to chrome://settings/help in the browser

# Enterprise deployment - verify patch status
# Check version is >= 123.0.6312.105