CVE-2023-1220 – This vulnerability is a heap buffer overflow in... (How to Fix)

Q: What is the severity of CVE-2023-1220?

CVE-2023-1220 has a CVSS score of 8.8 (HIGH). This vulnerability is a heap buffer overflow in Chrome's UMA (User Metrics Analysis) component that allows a remote attacker who has already compromised the renderer process to potentially exploit heap corruption. Attackers could execute arbitrary code or cause denial of service. All users running vulnerable Chrome versions are affected.

📋 TL;DR

This vulnerability is a heap buffer overflow in Chrome's UMA (User Metrics Analysis) component that allows a remote attacker who has already compromised the renderer process to potentially exploit heap corruption. Attackers could execute arbitrary code or cause denial of service. All users running vulnerable Chrome versions are affected.

💻 Affected Systems

Products:

Google Chrome
Chromium-based browsers

Versions: Prior to 111.0.5563.64

Operating Systems: Windows, macOS, Linux, Android, iOS

Default Config Vulnerable: ⚠️ Yes

Notes: Requires renderer process compromise first, but Chrome's multi-process architecture makes this feasible through other vulnerabilities.

📦 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.

🟠

Likely Case

Browser crash/denial of service or limited sandbox escape leading to additional privilege escalation.

🟢

If Mitigated

Browser crash with no further impact if sandbox holds and exploit fails.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploit requires chaining with renderer compromise vulnerability. Public PoC exists on Packet Storm.

🛠️ 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 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 JavaScript

all

Prevents execution of malicious JavaScript that could trigger the vulnerability

chrome://settings/content/javascript → Block

Enable Site Isolation

all

Enhances sandboxing between sites to limit impact

chrome://flags/#enable-site-per-process → Enable

🧯 If You Can't Patch

Restrict browser usage to trusted websites only
Implement application whitelisting to block Chrome execution

🔍 How to Verify

Check if Vulnerable:

Check Chrome version in About Google Chrome page. If version is below 111.0.5563.64, system is vulnerable.

Check Version:

On Windows: "chrome://version/" in browser; On Linux/macOS: google-chrome --version

Verify Fix Applied:

Confirm Chrome version is 111.0.5563.64 or higher in About Google Chrome page.

📡 Detection & Monitoring

Log Indicators:

Chrome crash reports with exception codes like STATUS_HEAP_CORRUPTION
Unexpected Chrome process termination events

Network Indicators:

Unusual outbound connections from Chrome processes post-crash

SIEM Query:

source="chrome_crash_reports" AND (exception_code="0xc0000374" OR process_name="chrome.exe")

📊 Metadata

CVE ID: CVE-2023-1220

CVSS v3 Score: 8.8 (HIGH)

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

CWE: CWE-787

Published: March 7, 2023

Last Updated: November 21, 2024

🔗 References

📤 Share & Export

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🔗 Related Vulnerabilities

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