CVE-2023-4349
📋 TL;DR
This is a use-after-free vulnerability in Google Chrome's Device Trust Connectors that allows remote attackers to potentially exploit heap corruption via a crafted HTML page. Attackers could execute arbitrary code or cause browser crashes. All users running vulnerable Chrome versions 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 →Fedora by Fedoraproject
⚠️ 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 code execution in browser sandbox
If Mitigated
No impact if Chrome is updated to patched version or if exploit attempts are blocked by security controls
🎯 Exploit Status
Exploitation requires user to visit malicious webpage. No public exploit code is known, but the vulnerability is actively being researched.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 116.0.5845.96 and later
Vendor Advisory: https://chromereleases.googleblog.com/2023/08/stable-channel-update-for-desktop_15.html
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
🔧 Temporary Workarounds
Disable JavaScript
allTemporarily disable JavaScript to prevent exploitation via malicious web pages
chrome://settings/content/javascript → Block
Use browser sandboxing
allRun Chrome in sandboxed environment to limit potential damage
🧯 If You Can't Patch
- Restrict access to untrusted websites using web filtering
- Implement application whitelisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in menu → Help → About Google Chrome. If version is below 116.0.5845.96, system is vulnerable.Check Version:
google-chrome --version (Linux) or chrome://version (all platforms)Verify Fix Applied:
Confirm Chrome version is 116.0.5845.96 or higher after update📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports
- Unexpected process termination events
- Security event logs showing exploit attempts
Network Indicators:
- Requests to known malicious domains hosting exploit code
- Unusual outbound connections from Chrome processes
SIEM Query:
source="chrome" AND (event_type="crash" OR process_name="chrome.exe" AND action="terminated")🔗 References
- https://chromereleases.googleblog.com/2023/08/stable-channel-update-for-desktop_15.html
- https://crbug.com/1458303
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2DMXHPRUGBUDNHZCZCIVMWAUIEXEGMGT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OCFEK63FUHFXZH5MSG6TNQOXMQWM4M5S/
- https://security.gentoo.org/glsa/202401-34
- https://www.debian.org/security/2023/dsa-5479
- https://chromereleases.googleblog.com/2023/08/stable-channel-update-for-desktop_15.html
- https://crbug.com/1458303
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2DMXHPRUGBUDNHZCZCIVMWAUIEXEGMGT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OCFEK63FUHFXZH5MSG6TNQOXMQWM4M5S/
- https://security.gentoo.org/glsa/202401-34
- https://www.debian.org/security/2023/dsa-5479
