CVE-2023-4427
📋 TL;DR
This vulnerability allows a remote attacker to perform out-of-bounds memory reads in Chrome's V8 JavaScript engine by tricking users into visiting a malicious HTML page. It affects all users of Google Chrome versions prior to 116.0.5845.110. The attacker could potentially read sensitive memory contents.
💻 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
Information disclosure leading to memory content leakage, which could include sensitive data like passwords, session tokens, or encryption keys stored in memory.
Likely Case
Information disclosure of random memory contents, potentially leading to further exploitation or system information leakage.
If Mitigated
No impact if Chrome is fully patched or if users avoid untrusted websites.
🎯 Exploit Status
Exploit requires user to visit malicious webpage. Public proof-of-concept available on Packet Storm.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 116.0.5845.110 and later
Vendor Advisory: https://chromereleases.googleblog.com/2023/08/chrome-desktop-stable-update.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 update.
🔧 Temporary Workarounds
Disable JavaScript
allTemporarily disable JavaScript to prevent exploitation via malicious web pages
chrome://settings/content/javascript → Block
Use Site Isolation
allEnable site isolation to limit impact of memory access vulnerabilities
chrome://flags/#enable-site-per-process → Enable
🧯 If You Can't Patch
- Restrict access to untrusted websites using web filtering or proxy controls
- Implement application whitelisting to prevent unauthorized Chrome execution
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: If version is less than 116.0.5845.110, system is vulnerable.Check Version:
google-chrome --version (Linux) or chrome://version (all platforms)Verify Fix Applied:
Verify Chrome version is 116.0.5845.110 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with V8-related errors
- Unusual memory access patterns in system logs
Network Indicators:
- Requests to known malicious domains hosting exploit code
- Unusual outbound connections after visiting suspicious sites
SIEM Query:
source="chrome" AND (event_type="crash" OR error_message="V8")🔗 References
- http://packetstormsecurity.com/files/174951/Chrome-ReduceJSLoadPropertyWithEnumeratedKey-Out-Of-Bounds-Access.html
- https://chromereleases.googleblog.com/2023/08/chrome-desktop-stable-update.html
- https://crbug.com/1470668
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/27NR3KG553CG6LGPMP6SHWEVHTYPL6RC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KUQ7CTX3W372X3UY56VVNAHCH6H2F4X3/
- https://security.gentoo.org/glsa/202401-34
- https://www.debian.org/security/2023/dsa-5483
- http://packetstormsecurity.com/files/174951/Chrome-ReduceJSLoadPropertyWithEnumeratedKey-Out-Of-Bounds-Access.html
- https://chromereleases.googleblog.com/2023/08/chrome-desktop-stable-update.html
- https://crbug.com/1470668
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/27NR3KG553CG6LGPMP6SHWEVHTYPL6RC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KUQ7CTX3W372X3UY56VVNAHCH6H2F4X3/
- https://security.gentoo.org/glsa/202401-34
- https://www.debian.org/security/2023/dsa-5483
