CVE-2024-6774
📋 TL;DR
This is a use-after-free vulnerability in Google Chrome's screen capture feature that allows remote attackers to potentially exploit heap corruption. Attackers can trigger this by convincing users to perform specific UI gestures on a crafted HTML page. All Chrome users prior to version 126.0.6478.182 are affected.
💻 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 malware installation.
Likely Case
Browser crash (denial of service) or limited information disclosure from memory corruption.
If Mitigated
Browser crash with no data loss if sandboxing and other Chrome security features work as intended.
🎯 Exploit Status
Requires user interaction (specific UI gestures) but no authentication. Exploit reliability may vary.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 126.0.6478.182
Vendor Advisory: https://chromereleases.googleblog.com/2024/07/stable-channel-update-for-desktop.html
Restart Required: Yes
Instructions:
1. Open Chrome. 2. Click three-dot menu → 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 screen capture permissions
allPrevent websites from accessing screen capture functionality
chrome://settings/content/screenCapture
Use browser extensions to block malicious sites
allInstall security extensions that block known malicious domains
🧯 If You Can't Patch
- Restrict user access to untrusted websites via web filtering
- Implement application allowlisting to prevent unauthorized browser execution
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in Settings → About Chrome. If version is below 126.0.6478.182, you are vulnerable.Check Version:
On Windows: chrome://version/ | On Linux: google-chrome --version | On macOS: /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --versionVerify Fix Applied:
Confirm Chrome version is 126.0.6478.182 or higher in Settings → About Chrome.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports
- Unexpected process termination events
- Security event logs showing browser exploitation attempts
Network Indicators:
- Traffic to known malicious domains hosting exploit code
- Unusual outbound connections from Chrome processes
SIEM Query:
source="chrome_logs" AND (event="crash" OR event="process_termination") AND version<"126.0.6478.182"