CVE-2020-6383
📋 TL;DR
This vulnerability is a type confusion flaw in Chrome's V8 JavaScript engine that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. It affects users running Google Chrome versions prior to 80.0.3987.116. Successful exploitation could lead to arbitrary code execution in the context of the browser.
💻 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...
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⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or ransomware deployment through the browser context.
Likely Case
Arbitrary code execution within the browser sandbox, potentially leading to session hijacking, credential theft, or installation of malware.
If Mitigated
Limited impact due to Chrome's sandboxing, potentially resulting in browser crash or denial of service.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious website). Public proof-of-concept exists in bug tracker.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 80.0.3987.116 and later
Vendor Advisory: https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_18.html
Restart Required: Yes
Instructions:
1. Open Chrome settings 2. Click 'About Chrome' 3. Allow Chrome to update automatically 4. Restart browser when prompted
🔧 Temporary Workarounds
Disable JavaScript
allTemporarily disable JavaScript execution in Chrome to prevent exploitation
chrome://settings/content/javascript
Use Site Isolation
allEnable site isolation to limit impact of potential exploitation
chrome://flags/#enable-site-per-process
🧯 If You Can't Patch
- Restrict browser usage to trusted websites only
- Implement network filtering to block malicious domains
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in settings. If version is below 80.0.3987.116, system is vulnerable.Check Version:
chrome://version/Verify Fix Applied:
Verify Chrome version is 80.0.3987.116 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports
- Unusual process creation from chrome.exe
Network Indicators:
- Connections to known malicious domains serving exploit code
SIEM Query:
source="chrome" AND (event_type="crash" OR process_name="chrome.exe" AND parent_process!="explorer.exe")🔗 References
- https://access.redhat.com/errata/RHSA-2020:0738
- https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_18.html
- https://crbug.com/1051017
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP/
- https://www.debian.org/security/2020/dsa-4638
- https://access.redhat.com/errata/RHSA-2020:0738
- https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_18.html
- https://crbug.com/1051017
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP/
- https://www.debian.org/security/2020/dsa-4638
