CVE-2023-4070 – This vulnerability is a type confusion flaw in ... (How to Fix)

Q: What is the severity of CVE-2023-4070?

CVE-2023-4070 has a CVSS score of 8.1 (HIGH). This vulnerability is a type confusion flaw in Chrome's V8 JavaScript engine that allows attackers to perform arbitrary memory read/write operations. Attackers can exploit this by tricking users into visiting a malicious webpage, potentially leading to remote code execution. All users running vulnerable versions of Chrome are affected.

📋 TL;DR

This vulnerability is a type confusion flaw in Chrome's V8 JavaScript engine that allows attackers to perform arbitrary memory read/write operations. Attackers can exploit this by tricking users into visiting a malicious webpage, potentially leading to remote code execution. All users running vulnerable versions of Chrome are affected.

💻 Affected Systems

Products:

Google Chrome
Chromium-based browsers

Versions: Versions prior to 115.0.5790.170

Operating Systems: Windows, Linux, macOS, Android

Default Config Vulnerable: ⚠️ Yes

Notes: All default Chrome configurations are vulnerable. Chromium-based browsers like Edge, Brave, etc. may also be affected if using vulnerable V8 versions.

📦 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 complete system compromise, data theft, ransomware deployment, or persistent backdoor installation.

🟠

Likely Case

Browser compromise allowing session hijacking, credential theft, cryptocurrency mining, or installation of additional malware.

🟢

If Mitigated

Limited impact if browser sandboxing works properly, potentially just browser crash or tab isolation breach.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires user interaction (visiting malicious page). The bug report suggests reliable exploitation is possible.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 115.0.5790.170 and later

Vendor Advisory: https://chromereleases.googleblog.com/2023/08/stable-channel-update-for-desktop.html

Restart Required: Yes

Instructions:

1. Open Chrome menu > Help > About Google Chrome. 2. Chrome will automatically check for updates and install if available. 3. Click 'Relaunch' to restart Chrome with the patched version.

🔧 Temporary Workarounds

Disable JavaScript

all

Temporarily disable JavaScript execution in Chrome to prevent exploitation

chrome://settings/content/javascript > Block

Use Site Isolation

all

Ensure site isolation is enabled for additional protection

chrome://flags/#site-isolation-trial-opt-out > Disabled

🧯 If You Can't Patch

Use alternative browsers temporarily
Implement network filtering to block malicious websites

🔍 How to Verify

Check if Vulnerable:

Check Chrome version: chrome://version and compare to vulnerable range

Check Version:

google-chrome --version (Linux) or check chrome://version

Verify Fix Applied:

Verify Chrome version is 115.0.5790.170 or higher

📡 Detection & Monitoring

Log Indicators:

Chrome crash reports with V8-related errors
Unusual process spawning from Chrome

Network Indicators:

Connections to known malicious domains serving exploit code

SIEM Query:

process_name:"chrome.exe" AND (event_id:1000 OR event_id:1001) AND message:"V8"

📊 Metadata

CVE ID: CVE-2023-4070

CVSS v3 Score: 8.1 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CWE: CWE-843

Published: August 3, 2023

Last Updated: November 21, 2024

🔗 References

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🔗 Related Vulnerabilities

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