CVE-2024-7018
📋 TL;DR
A heap buffer overflow vulnerability in Chrome's PDF renderer allows remote attackers to execute arbitrary code or cause denial of service via specially crafted PDF files. This affects all Chrome users on vulnerable versions who open malicious PDFs.
💻 Affected Systems
- Google Chrome
- Chromium-based browsers
📦 What is this software?
Chrome by Google
Google Chrome is the world's most popular web browser, used by over 3 billion users globally across Windows, macOS, Linux, Android, and iOS platforms. As a Chromium-based browser developed by Google, Chrome dominates the browser market with approximately 65% market share, making it a critical compon...
Learn more about Chrome →⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or ransomware deployment.
Likely Case
Browser crash (denial of service) or limited memory corruption leading to instability.
If Mitigated
No impact if patched or if PDFs are opened in sandboxed environments.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious PDF). Chrome's sandbox provides some mitigation against full system compromise.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 124.0.6367.78
Vendor Advisory: https://issues.chromium.org/issues/333414305
Restart Required: Yes
Instructions:
1. Open Chrome. 2. Click menu (three dots) → Help → About Google Chrome. 3. Chrome will automatically check for and install updates. 4. Click 'Relaunch' to restart Chrome with the patched version.
🔧 Temporary Workarounds
Disable Chrome PDF Viewer
allForce PDFs to open in external applications instead of Chrome's built-in PDF renderer.
chrome://settings/content/pdfDocuments → Toggle 'Download PDF files instead of automatically opening them in Chrome'
Use PDF Viewer Extension
allInstall a third-party PDF viewer extension that doesn't use Chrome's vulnerable PDF component.
🧯 If You Can't Patch
- Block PDF file downloads at network perimeter or email gateways.
- Educate users to avoid opening PDFs from untrusted sources.
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: chrome://settings/help. If version is below 124.0.6367.78, system is vulnerable.Check Version:
On Windows: "C:\Program Files\Google\Chrome\Application\chrome.exe" --version
On macOS: /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version
On Linux: google-chrome --versionVerify Fix Applied:
Confirm Chrome version is 124.0.6367.78 or higher via chrome://settings/help.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with PDF-related stack traces
- Unexpected Chrome process terminations when opening PDFs
Network Indicators:
- PDF file downloads from suspicious sources
- Unusual PDF file sizes or structures
SIEM Query:
source="chrome_crash_logs" AND (process="chrome" OR process="chrome_renderer") AND message="*pdf*" AND severity="CRITICAL"