CVE-2023-1215
📋 TL;DR
This vulnerability is a type confusion flaw in Chrome's CSS engine that allows a remote attacker to trigger heap corruption by tricking the browser into misinterpreting data types. Attackers can exploit this via a malicious HTML page, potentially leading to arbitrary code execution. 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 →⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the same privileges as the Chrome process, potentially leading to full system compromise, data theft, or ransomware deployment.
Likely Case
Browser crash (denial of service) or limited memory corruption that could be leveraged for sandbox escape or information disclosure.
If Mitigated
With proper controls like Chrome's sandbox, exploitation would be contained to the browser process, preventing full system compromise.
🎯 Exploit Status
Exploitation requires user interaction (visiting a malicious page) but no authentication. Type confusion vulnerabilities often require significant expertise to weaponize reliably.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 111.0.5563.64 and later
Vendor Advisory: https://chromereleases.googleblog.com/2023/03/stable-channel-update-for-desktop.html
Restart Required: Yes
Instructions:
1. Open Chrome. 2. Click the three-dot menu. 3. Go to Help > About Google Chrome. 4. Chrome will automatically check for and install updates. 5. Click 'Relaunch' to restart Chrome with the patched version.
🔧 Temporary Workarounds
Disable JavaScript
allPrevents execution of malicious scripts that could trigger the vulnerability
chrome://settings/content/javascript
Use Site Isolation
allEnables Chrome's Site Isolation feature to limit impact of memory corruption
chrome://flags/#enable-site-per-process
🧯 If You Can't Patch
- Use alternative browsers until patching is possible
- Implement network filtering to block malicious websites and ads
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in Settings > About Chrome. If version is below 111.0.5563.64, system is vulnerable.Check Version:
google-chrome --versionVerify Fix Applied:
Confirm Chrome version is 111.0.5563.64 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports
- Unexpected process terminations
- Memory access violation errors
Network Indicators:
- Connections to suspicious domains serving HTML/CSS content
- Unusual outbound traffic from Chrome processes
SIEM Query:
source="chrome" AND (event_type="crash" OR message="access violation" OR message="heap corruption")