CVE-2024-3834: Google Chrome Use After Free Vulnerability

CVE-2024-3834 Overview

CVE-2024-3834 is a use-after-free vulnerability in the Downloads component of Google Chrome prior to version 124.0.6367.60. This memory corruption flaw allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. The vulnerability was classified with high severity by the Chromium security team due to its potential for complete system compromise.

Critical Impact

This use-after-free vulnerability enables remote attackers to achieve heap corruption through maliciously crafted web content, potentially leading to arbitrary code execution within the browser context.

Affected Products

• Google Chrome versions prior to 124.0.6367.60
• Chromium-based browsers using affected components
• Fedora Linux distributions with vulnerable Chrome/Chromium packages

Discovery Timeline

• 2024-04-17 - CVE-2024-3834 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-3834

Vulnerability Analysis

This use-after-free vulnerability (CWE-416) exists in the Downloads component of Google Chrome. Use-after-free conditions occur when a program continues to reference memory after it has been freed. In this case, the Downloads functionality improperly manages memory objects, allowing an attacker to access or manipulate memory regions that have already been deallocated.

The vulnerability requires user interaction—a victim must visit a malicious webpage containing the crafted HTML payload. Once triggered, the heap corruption can be leveraged to gain control over program execution, potentially allowing the attacker to execute arbitrary code with the privileges of the browser process.

Root Cause

The root cause lies in improper lifecycle management of memory objects within Chrome's Downloads component. When handling download operations, the browser fails to properly track object references, leading to a scenario where freed memory is subsequently accessed. This temporal memory safety violation creates an exploitable condition where attacker-controlled data can overwrite critical program structures.

Attack Vector

The attack is network-based and requires user interaction. An attacker must craft a malicious HTML page that triggers the vulnerable code path in the Downloads component. When a victim visits the attacker-controlled webpage, the crafted content exploits the use-after-free condition to corrupt heap memory. Successful exploitation could allow:

• Arbitrary code execution within the browser sandbox
• Potential sandbox escape when combined with other vulnerabilities
• Complete compromise of user data and browser session

The vulnerability can be exploited through typical attack scenarios such as phishing emails containing malicious links, compromised websites serving malicious content, or malvertising campaigns.

Detection Methods for CVE-2024-3834

Indicators of Compromise

• Unexpected Chrome browser crashes during download operations or when visiting untrusted websites
• Anomalous memory consumption patterns in Chrome processes, particularly the renderer or download handler processes
• Suspicious HTML pages with complex JavaScript manipulating download-related browser APIs
• Network traffic to known malicious domains serving exploit kits targeting browser vulnerabilities

Detection Strategies

• Monitor browser version inventory across endpoints to identify systems running Chrome versions prior to 124.0.6367.60
• Deploy endpoint detection rules that identify memory corruption exploitation patterns such as heap spray indicators
• Implement browser telemetry analysis to detect abnormal behavior in download operations
• Use SentinelOne's behavioral AI to detect exploitation attempts through anomalous process behavior

Monitoring Recommendations

• Enable Chrome's built-in crash reporting and monitor for patterns indicating exploitation attempts
• Deploy network security monitoring to detect connections to known malicious infrastructure
• Implement application allowlisting to prevent unauthorized code execution from browser processes
• Monitor for unusual child processes spawned by Chrome that could indicate post-exploitation activity

How to Mitigate CVE-2024-3834

Immediate Actions Required

• Update Google Chrome to version 124.0.6367.60 or later immediately across all systems
• Enable automatic browser updates to ensure timely deployment of security patches
• Educate users about the risks of visiting untrusted websites until patches are applied
• Consider implementing browser isolation technologies for high-risk users

Patch Information

Google has released Chrome version 124.0.6367.60 that addresses this vulnerability. The fix was announced in the Google Chrome Stable Channel Update on April 16, 2024. Additional technical details can be found in the Chromium Issue Tracker Entry.

Fedora Linux users should apply updates as documented in the following advisories:

• Fedora Package Announcement
• Fedora Package Security Update

Workarounds

• Restrict access to untrusted websites through web filtering until the patch can be applied
• Consider temporarily disabling Chrome's download functionality via enterprise policies if feasible
• Implement network-level controls to block known exploit delivery domains
• Use browser isolation solutions to contain potential exploitation attempts

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

# Force Chrome update check (Windows PowerShell)
# Navigate to chrome://settings/help to trigger update

# Enterprise deployment: Use Group Policy or Chrome Enterprise policies
# to enforce minimum browser version requirements