CVE-2024-6779: Google Chrome V8 RCE Vulnerability

CVE-2024-6779 Overview

CVE-2024-6779 is an out-of-bounds memory access vulnerability in V8, Google Chrome's JavaScript and WebAssembly engine. This flaw exists in versions of Google Chrome prior to 126.0.6478.182 and allows a remote attacker to potentially escape the browser sandbox through a specially crafted HTML page. The vulnerability has been classified with high severity by the Chromium security team.

Critical Impact

This vulnerability enables potential sandbox escape, allowing attackers to break out of Chrome's security boundary and execute code with elevated privileges on the underlying system. Successful exploitation could lead to complete system compromise.

Affected Products

• Google Chrome versions prior to 126.0.6478.182
• All platforms running vulnerable Chrome versions (Windows, macOS, Linux)
• Chromium-based browsers that incorporate the vulnerable V8 engine

Discovery Timeline

• 2024-07-16 - CVE-2024-6779 published to NVD
• 2025-03-20 - Last updated in NVD database

Technical Details for CVE-2024-6779

Vulnerability Analysis

This vulnerability stems from improper memory bounds checking within Google Chrome's V8 JavaScript engine. V8 is responsible for parsing, compiling, and executing JavaScript and WebAssembly code within the browser. The out-of-bounds memory access flaw allows attackers to read or write memory outside the intended boundaries of allocated buffers.

The vulnerability is particularly severe because it can be leveraged to escape Chrome's sandbox—a critical security mechanism designed to isolate web content from the underlying operating system. A successful sandbox escape means that malicious code running within a compromised renderer process can break free and interact directly with the host system, potentially achieving full system compromise.

The attack requires user interaction (visiting a malicious webpage), but once triggered, the scope of impact extends beyond the vulnerable component, affecting confidentiality, integrity, and availability of the target system.

Root Cause

The root cause of CVE-2024-6779 lies in insufficient bounds validation within V8's memory handling routines. The vulnerability is associated with two CWE classifications:

• CWE-787 (Out-of-bounds Write): The code writes data past the end or before the beginning of an intended buffer
• CWE-125 (Out-of-bounds Read): The code reads data past the end or before the beginning of an intended buffer

These memory safety issues occur when V8 processes specially crafted JavaScript or WebAssembly code, leading to memory corruption that can be weaponized for arbitrary code execution or information disclosure.

Attack Vector

The attack vector for CVE-2024-6779 is network-based and requires user interaction. An attacker would need to:

1. Create a malicious HTML page containing specially crafted JavaScript or WebAssembly code designed to trigger the out-of-bounds memory access in V8
2. Lure a victim to visit the malicious page through phishing, malvertising, or compromised legitimate websites
3. Upon page load, the malicious code executes within the browser, exploiting the memory corruption vulnerability
4. If successful, the attacker escapes the browser sandbox and gains access to the underlying system with the privileges of the Chrome process

The vulnerability's network accessibility and potential for sandbox escape make it particularly dangerous for drive-by download attacks targeting enterprise and consumer users alike. For detailed technical information, refer to the Chromium Issue Tracker Entry.

Detection Methods for CVE-2024-6779

Indicators of Compromise

• Unusual Chrome renderer process crashes or unexpected termination patterns
• Chrome processes attempting to access files or resources outside typical sandbox boundaries
• Anomalous memory consumption patterns in Chrome's V8 isolate processes
• Suspicious network connections originating from Chrome processes to unknown external hosts

Detection Strategies

• Monitor for Chrome versions below 126.0.6478.182 across the enterprise using asset management tools
• Deploy endpoint detection rules to identify unusual child process spawning from Chrome renderer processes
• Implement web content filtering to block access to known malicious domains serving exploit code
• Configure browser crash reporting and analyze dumps for V8-related memory corruption signatures

Monitoring Recommendations

• Enable Chrome's built-in crash reporting to capture and analyze crash telemetry for V8 anomalies
• Implement network monitoring to detect unusual outbound connections following browser exploitation attempts
• Configure SIEM rules to correlate multiple Chrome crash events with subsequent suspicious system activity
• Deploy SentinelOne's browser protection capabilities to detect and block sandbox escape attempts in real-time

How to Mitigate CVE-2024-6779

Immediate Actions Required

• Update Google Chrome to version 126.0.6478.182 or later immediately across all managed systems
• Enable automatic Chrome updates to ensure timely deployment of security patches
• Review and restrict browser permissions where feasible to limit potential impact of exploitation
• Consider implementing browser isolation solutions for high-risk users or when accessing untrusted content

Patch Information

Google has addressed this vulnerability in Chrome version 126.0.6478.182. Organizations should prioritize updating to this version or later. The stable channel update details are available in the Google Chrome Desktop Update announcement.

For enterprise deployments, administrators can use Chrome Browser Cloud Management or Group Policy (Windows) to enforce browser updates. Verify patch deployment using the following command:

# Check Chrome version on Windows (PowerShell)
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.FileVersion

# Check Chrome version on macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Check Chrome version on Linux
google-chrome --version

Workarounds

• Implement network-level controls to block access to suspicious or unvetted websites pending patch deployment
• Consider temporarily using alternative browsers for accessing untrusted content while patching is in progress
• Enable Chrome's Site Isolation feature (chrome://flags/#enable-site-per-process) if not already active to provide additional defense-in-depth
• Deploy web application firewalls with JavaScript inspection capabilities to detect and block malicious payloads

# Configuration example for enterprise Chrome deployment
# GPO or Chrome policy to enforce minimum version and auto-updates

# Windows Registry (deploy via GPO)
# HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update
# AutoUpdateCheckPeriodMinutes = 60
# UpdateDefault = 1 (Always allow updates)

# macOS managed preferences (com.google.Keystone)
# defaults write com.google.Keystone updatePolicies -dict-add global -dict UpdateDefault -int 1