CVE-2024-0519: Google Chrome V8 RCE Vulnerability

CVE-2024-0519 Overview

CVE-2024-0519 is an out-of-bounds memory access vulnerability in V8, the JavaScript and WebAssembly engine used by Google Chrome. This memory corruption flaw exists in Chrome versions prior to 120.0.6099.224 and allows a remote attacker to potentially exploit heap corruption through a specially crafted HTML page. When successfully exploited, this vulnerability can lead to arbitrary code execution within the context of the browser process, compromising the confidentiality, integrity, and availability of affected systems.

Critical Impact

This vulnerability is actively exploited in the wild and has been added to CISA's Known Exploited Vulnerabilities (KEV) catalog. Organizations should prioritize immediate patching as threat actors are leveraging this flaw for real-world attacks targeting users who visit malicious websites.

Affected Products

• Google Chrome versions prior to 120.0.6099.224
• Fedora Project Fedora 38 and 39 (via bundled Chromium)
• Couchbase Server (embedded Chromium components)

Discovery Timeline

• 2024-01-16 - CVE-2024-0519 published to NVD
• 2025-10-24 - Last updated in NVD database

Technical Details for CVE-2024-0519

Vulnerability Analysis

This vulnerability stems from improper bounds checking within Google Chrome's V8 JavaScript engine. V8 is responsible for parsing, compiling, and executing JavaScript code within the browser. The flaw involves out-of-bounds memory access that can be triggered when processing maliciously crafted JavaScript within an HTML page. When the engine processes specific code patterns, it fails to properly validate array indices or object property accesses, leading to memory reads or writes beyond allocated buffer boundaries.

The exploitation of this vulnerability can result in heap corruption, which attackers can leverage to achieve arbitrary code execution. By carefully crafting the malicious payload, an attacker can manipulate memory layout to gain control over program execution flow. This type of vulnerability in a JavaScript engine is particularly dangerous because it can be exploited simply by convincing a user to visit a malicious webpage—no additional user interaction is required beyond the initial page visit.

Root Cause

The root cause of CVE-2024-0519 is an out-of-bounds memory access condition (CWE-125: Out-of-bounds Read and CWE-787: Out-of-bounds Write) in the V8 engine's memory handling routines. This occurs when V8 processes certain JavaScript constructs that bypass normal boundary validation checks. The V8 engine's optimizing compiler may generate code that accesses memory outside the intended bounds of arrays or typed arrays, especially under specific JIT (Just-In-Time) compilation scenarios where bounds checks may be optimized away incorrectly.

Attack Vector

The attack vector for this vulnerability is network-based and requires user interaction. An attacker must entice a victim to visit a specially crafted webpage containing malicious JavaScript code. The attack sequence follows this pattern:

1. The attacker hosts or injects malicious JavaScript into a webpage
2. The victim navigates to the compromised or malicious website
3. The Chrome browser's V8 engine processes the malicious JavaScript
4. The crafted code triggers the out-of-bounds memory access condition
5. Heap corruption occurs, potentially allowing the attacker to execute arbitrary code
6. The attacker gains code execution within the Chrome renderer process

No authentication is required, and the attack can be delivered through phishing emails, malicious advertisements, compromised legitimate websites, or watering hole attacks. For detailed technical information, see the Chromium Bug Report #1517354.

Detection Methods for CVE-2024-0519

Indicators of Compromise

• Unexpected Chrome renderer process crashes or high memory consumption patterns
• Network traffic to suspicious domains hosting JavaScript-heavy content
• Browser process executing unexpected child processes or making anomalous system calls
• Memory dump artifacts showing V8 heap corruption signatures

Detection Strategies

• Monitor endpoint telemetry for Chrome processes exhibiting abnormal memory access patterns
• Deploy browser version auditing to identify unpatched Chrome installations across the enterprise
• Implement network-based detection rules for known malicious JavaScript patterns targeting V8
• Utilize SentinelOne's behavioral AI to detect post-exploitation activities following browser compromise

Monitoring Recommendations

• Enable Chrome's built-in crash reporting and monitor for V8-related crashes
• Implement centralized browser management to track and enforce version compliance
• Configure SIEM alerts for unusual Chrome process behavior including unexpected DLL loads or process spawning
• Review web proxy logs for access to domains associated with known exploitation attempts

How to Mitigate CVE-2024-0519

Immediate Actions Required

• Update Google Chrome to version 120.0.6099.224 or later immediately across all endpoints
• Verify Chrome auto-update functionality is enabled and functioning properly
• Apply Fedora security updates for affected Fedora 38 and 39 systems
• Review Couchbase Server deployments and apply vendor security patches from Couchbase Security Alerts
• Consider temporarily restricting access to untrusted websites on critical systems until patching is complete

Patch Information

Google has released Chrome version 120.0.6099.224 which addresses this vulnerability along with other security fixes. The update is available through Chrome's automatic update mechanism and can be manually triggered by navigating to chrome://settings/help. Organizations should reference the Google Blog Chrome Update for official release notes. Fedora users should apply updates via the standard package management system as documented in the Fedora Package Announcement and Fedora Security Update Notice.

Workarounds

• Enable Site Isolation in Chrome to limit the impact of renderer process compromise
• Implement browser security policies via Group Policy or MDM to restrict JavaScript execution on untrusted sites
• Deploy web content filtering to block access to known malicious domains
• Consider using Chrome's JIT-less mode (--js-flags=--jitless) for high-security environments, though this may impact performance

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

# Force Chrome update check (Windows)
# Navigate to chrome://settings/help or run:
# "C:\Program Files\Google\Chrome\Application\chrome.exe" --check-for-update-interval=1

# Fedora update commands
sudo dnf update chromium --refresh