CVE-2020-6463
📋 TL;DR
CVE-2020-6463 is a use-after-free vulnerability in ANGLE (Almost Native Graphics Layer Engine) component of Google Chrome that could allow remote attackers to execute arbitrary code or cause heap corruption. Attackers can exploit this by tricking users into visiting a malicious HTML page. All Chrome users prior to version 81.0.4044.122 are affected.
💻 Affected Systems
- Google Chrome
- Chromium-based browsers
📦 What is this software?
Backports Sle by Opensuse
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
Fedora by Fedoraproject
Leap by Opensuse
Leap by Opensuse
Ubuntu Linux by Canonical
Ubuntu Linux by Canonical
Ubuntu Linux by Canonical
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with system-level privileges, potentially leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Browser crash (denial of service) or limited code execution within Chrome's sandbox, potentially allowing data exfiltration or further exploitation.
If Mitigated
No impact if Chrome is fully patched or if exploit attempts are blocked by security controls.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious page) but no authentication. CVSS 8.8 indicates high exploitability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 81.0.4044.122 and later
Vendor Advisory: https://chromereleases.googleblog.com/2020/04/stable-channel-update-for-desktop_21.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 WebGL
allDisables ANGLE component by turning off WebGL acceleration
chrome://flags → Search 'WebGL' → Set 'WebGL 2.0' to Disabled
Enable Site Isolation
allLimits impact by isolating websites in separate processes
chrome://flags → Search 'Site Isolation' → Enable 'Strict site isolation'
🧯 If You Can't Patch
- Use browser extensions that block JavaScript execution on untrusted sites
- Implement network filtering to block known malicious domains hosting exploit code
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: if below 81.0.4044.122, system is vulnerable.Check Version:
chrome://version (on Chrome) or google-chrome --version (command line)Verify Fix Applied:
Confirm Chrome version is 81.0.4044.122 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with ANGLE-related errors
- Unexpected Chrome process termination
Network Indicators:
- HTTP requests to domains hosting HTML with WebGL/Canvas content
- Unusual outbound connections after visiting HTML pages
SIEM Query:
source="chrome" AND (event="crash" OR error="ANGLE" OR error="use-after-free")🔗 References
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00032.html
- https://chromereleases.googleblog.com/2020/04/stable-channel-update-for-desktop_21.html
- https://crbug.com/1065186
- https://lists.debian.org/debian-lts-announce/2020/07/msg00027.html
- https://lists.debian.org/debian-lts-announce/2020/08/msg00006.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQYH5OK7O4BU6E37WWG5SEEHV65BFSGR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WLFZ5N4EK6I4ZJP5YSKLLVN3ELXEB4XT/
- https://security.gentoo.org/glsa/202007-60
- https://security.gentoo.org/glsa/202007-64
- https://usn.ubuntu.com/4443-1/
- https://www.debian.org/security/2020/dsa-4714
- https://www.debian.org/security/2020/dsa-4736
- https://www.debian.org/security/2020/dsa-4740
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00032.html
- https://chromereleases.googleblog.com/2020/04/stable-channel-update-for-desktop_21.html
- https://crbug.com/1065186
- https://lists.debian.org/debian-lts-announce/2020/07/msg00027.html
- https://lists.debian.org/debian-lts-announce/2020/08/msg00006.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQYH5OK7O4BU6E37WWG5SEEHV65BFSGR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WLFZ5N4EK6I4ZJP5YSKLLVN3ELXEB4XT/
- https://security.gentoo.org/glsa/202007-60
- https://security.gentoo.org/glsa/202007-64
- https://usn.ubuntu.com/4443-1/
- https://www.debian.org/security/2020/dsa-4714
- https://www.debian.org/security/2020/dsa-4736
- https://www.debian.org/security/2020/dsa-4740
