CVE-2024-4331: Google Chrome Use After Free Vulnerability

CVE-2024-4331 Overview

CVE-2024-4331 is a use-after-free vulnerability discovered in the Picture In Picture component of Google Chrome prior to version 124.0.6367.118. This memory corruption flaw allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. The vulnerability is classified as high severity by the Chromium security team and poses significant risk to users who visit malicious websites.

Use-after-free vulnerabilities occur when a program continues to use a memory location after it has been freed, leading to undefined behavior that attackers can exploit. In this case, the Picture In Picture feature—which allows users to watch videos in a floating window while browsing other content—contains a flaw in its memory management that can be triggered through specially crafted HTML content.

Critical Impact

Remote attackers can exploit heap corruption through malicious HTML pages, potentially achieving arbitrary code execution with the privileges of the browser process.

Affected Products

• Google Chrome versions prior to 124.0.6367.118
• Fedora 38 (affected through bundled Chromium)
• Fedora 39 (affected through bundled Chromium)
• Fedora 40 (affected through bundled Chromium)

Discovery Timeline

• 2024-05-01 - CVE-2024-4331 published to NVD
• 2024-12-20 - Last updated in NVD database

Technical Details for CVE-2024-4331

Vulnerability Analysis

This use-after-free vulnerability (CWE-416) exists within the Picture In Picture implementation in Chromium's rendering engine. The flaw occurs when the browser improperly manages the lifecycle of objects associated with the Picture In Picture feature.

The vulnerability can be triggered remotely over the network and requires user interaction—specifically, a victim must navigate to a malicious webpage containing the crafted HTML payload. Once triggered, the vulnerability allows an attacker to corrupt heap memory, which can lead to arbitrary code execution within the context of the Chrome browser process.

The attack does not require any privileges or authentication, making it accessible to any attacker who can convince a user to visit a malicious page. Successful exploitation could allow an attacker to execute arbitrary code, access sensitive information, or cause denial of service.

Root Cause

The root cause is improper memory management in the Picture In Picture component. When certain operations are performed on Picture In Picture windows, the code fails to properly track object lifetimes, resulting in a dangling pointer. Subsequent use of this freed memory location can corrupt heap structures and potentially allow an attacker to gain control of program execution.

This type of vulnerability is common in complex browser codebases where multiple components interact with shared objects, and the timing of object creation and destruction must be carefully synchronized.

Attack Vector

The attack vector is network-based, requiring user interaction. An attacker must host or inject malicious HTML content that triggers the vulnerable code path in the Picture In Picture implementation. The attack scenario typically involves:

1. Attacker creates a malicious webpage with crafted HTML/JavaScript that manipulates the Picture In Picture API
2. Victim navigates to the malicious page or is redirected there
3. The crafted content triggers the use-after-free condition
4. Heap corruption occurs, potentially allowing code execution

The vulnerability can be exploited through various delivery mechanisms including phishing emails with malicious links, compromised advertisements (malvertising), or watering hole attacks on frequently visited websites.

Detection Methods for CVE-2024-4331

Indicators of Compromise

• Unexpected browser crashes when viewing Picture In Picture content
• Anomalous memory access patterns in Chrome processes
• Suspicious network connections originating from browser processes after visiting unknown websites
• Chrome crash reports indicating heap corruption in Picture In Picture related code paths

Detection Strategies

• Monitor for Chrome crash reports containing references to Picture In Picture components or heap corruption
• Implement network monitoring to detect connections to known malicious domains serving browser exploits
• Deploy endpoint detection solutions capable of identifying memory corruption exploitation techniques
• Review browser telemetry for unusual Picture In Picture API usage patterns

Monitoring Recommendations

• Enable Chrome crash reporting and monitor for patterns indicating exploitation attempts
• Configure SentinelOne Singularity XDR to detect suspicious browser process behavior and memory anomalies
• Monitor web proxy logs for access to newly registered domains or known exploit kit infrastructure
• Implement browser extension policies to restrict access to potentially malicious websites

How to Mitigate CVE-2024-4331

Immediate Actions Required

• Update Google Chrome to version 124.0.6367.118 or later immediately
• Enable automatic updates in Chrome to ensure timely patching of future vulnerabilities
• Verify all Chromium-based browsers in the environment are updated (Edge, Brave, Opera, etc.)
• For Fedora users, apply the latest security updates through the package manager

Patch Information

Google has released Chrome version 124.0.6367.118 which addresses this vulnerability. The fix was announced in the Google Chrome Desktop Update on April 30, 2024.

For detailed technical information about the vulnerability, refer to the Chromium Issue Tracker Entry.

Fedora users should update their systems using the standard package management tools, as security updates have been released for Fedora 38, 39, and 40.

Workarounds

• If immediate patching is not possible, consider using an alternative browser temporarily
• Implement web filtering to block access to untrusted or suspicious websites
• Enable Chrome's Site Isolation feature for additional protection against exploitation
• Consider disabling Picture In Picture functionality via enterprise policies until patching is complete

# Update Chrome on Linux systems
# For Debian/Ubuntu-based systems
sudo apt update && sudo apt upgrade google-chrome-stable

# For Fedora systems
sudo dnf update chromium

# Verify Chrome version after update
google-chrome --version
# Should show version 124.0.6367.118 or later