CVE-2023-0129: Google Chrome Buffer Overflow Vulnerability

CVE-2023-0129 Overview

CVE-2023-0129 is a heap buffer overflow vulnerability in the Network Service component of Google Chrome prior to version 109.0.5414.74. This memory corruption flaw allows an attacker who convinces a user to install a malicious extension to potentially exploit heap corruption via a crafted HTML page and specific user interactions. The vulnerability was assigned a Chromium security severity rating of High.

Critical Impact

Successful exploitation of this heap buffer overflow vulnerability could allow attackers to achieve arbitrary code execution, potentially leading to complete system compromise through browser-based attacks.

Affected Products

• Google Chrome versions prior to 109.0.5414.74
• Chromium-based browsers using vulnerable Network Service components
• All platforms running affected Chrome versions (Windows, macOS, Linux)

Discovery Timeline

• 2023-01-10 - CVE-2023-0129 published to NVD
• 2025-05-05 - Last updated in NVD database

Technical Details for CVE-2023-0129

Vulnerability Analysis

This vulnerability is classified as CWE-787 (Out-of-Bounds Write), a type of memory corruption flaw that occurs when a program writes data past the end or before the beginning of an allocated memory buffer. In the context of Chrome's Network Service, this heap buffer overflow can be triggered through specific interactions with a crafted HTML page when a malicious browser extension is installed.

The Network Service in Chrome handles network requests and responses, making it a critical component for browser security. When processing certain data structures, improper bounds checking allows an attacker to overflow the heap buffer, potentially corrupting adjacent memory regions.

Root Cause

The root cause lies in insufficient bounds validation within the Network Service component when handling specific network-related operations. The heap buffer overflow occurs because the code fails to properly verify that data being written fits within the allocated buffer boundaries. This enables an attacker to write beyond the intended memory region, leading to heap corruption.

Attack Vector

The attack requires user interaction on two levels: first, the victim must be convinced to install a malicious browser extension, and second, they must visit or interact with a crafted HTML page. The attack vector is network-based, as the malicious payload is delivered through web content.

The exploitation chain involves:

1. Distribution and installation of a malicious Chrome extension
2. User navigation to an attacker-controlled or compromised webpage
3. Triggering specific interactions that cause the Network Service to process malicious data
4. Heap buffer overflow leading to memory corruption
5. Potential arbitrary code execution in the browser context

The vulnerability is documented in Chromium Bug Report #1382033 with additional technical details available through the official security advisories.

Detection Methods for CVE-2023-0129

Indicators of Compromise

• Unexpected Chrome crashes or instability when visiting specific websites
• Presence of unauthorized or suspicious browser extensions
• Abnormal memory usage patterns in Chrome's Network Service process
• Browser process spawning unexpected child processes or network connections

Detection Strategies

• Monitor for Chrome versions prior to 109.0.5414.74 across the enterprise environment
• Implement endpoint detection rules for heap corruption indicators in browser processes
• Review installed browser extensions for unauthorized or suspicious entries
• Deploy network monitoring to detect connections to known malicious infrastructure
• Utilize SentinelOne's behavioral AI to detect anomalous browser process behavior

Monitoring Recommendations

• Enable Chrome's built-in crash reporting to identify potential exploitation attempts
• Monitor system logs for signs of memory corruption or process crashes
• Implement centralized browser extension management and auditing
• Track browser version compliance across endpoints using asset management tools

How to Mitigate CVE-2023-0129

Immediate Actions Required

• Update Google Chrome to version 109.0.5414.74 or later immediately
• Audit and remove any unauthorized or suspicious browser extensions
• Enable automatic updates for Google Chrome across all managed endpoints
• Review browser extension policies to restrict installation of unverified extensions

Patch Information

Google has addressed this vulnerability in Chrome version 109.0.5414.74. The official security update details are available in the Google Chrome Stable Channel Update announcement. Linux distributions have also released corresponding security advisories, including Gentoo Security Advisory GLSA-202305-10 and GLSA-202311-11.

Workarounds

• Implement browser extension whitelisting to prevent installation of unauthorized extensions
• Use enterprise browser policies to disable extension installation from untrusted sources
• Enable Site Isolation in Chrome for additional process-level protection
• Consider using application sandboxing solutions to limit browser process capabilities
• Deploy SentinelOne endpoint protection with behavioral analysis for real-time threat detection

# Chrome enterprise policy configuration for extension management
# Add to Chrome policies to restrict extension installations

# On Linux: /etc/opt/chrome/policies/managed/extension_policy.json
{
  "ExtensionInstallBlocklist": ["*"],
  "ExtensionInstallAllowlist": ["approved_extension_id_1", "approved_extension_id_2"],
  "ExtensionInstallSources": ["https://trusted-source.example.com/*"]
}