CVE-2024-7532: Google Chrome Buffer Overflow Vulnerability

CVE-2024-7532 Overview

CVE-2024-7532 is a critical out-of-bounds memory access vulnerability in the ANGLE (Almost Native Graphics Layer Engine) component of Google Chrome. This vulnerability exists in versions prior to 127.0.6533.99 and allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. ANGLE is a graphics engine abstraction layer used by Chrome to translate OpenGL ES API calls to platform-specific hardware-accelerated graphics APIs, making this a significant attack surface for browser-based exploitation.

Critical Impact

Remote attackers can exploit heap corruption through malicious web pages, potentially achieving arbitrary code execution with the privileges of the Chrome browser process.

Affected Products

• Google Chrome versions prior to 127.0.6533.99
• Chromium-based browsers using vulnerable ANGLE component
• All platforms where Google Chrome is deployed (Windows, macOS, Linux)

Discovery Timeline

• August 6, 2024 - CVE-2024-7532 published to NVD
• August 12, 2024 - Last updated in NVD database

Technical Details for CVE-2024-7532

Vulnerability Analysis

This vulnerability is classified under CWE-787 (Out-of-bounds Write), indicating that the ANGLE component improperly handles memory boundaries during graphics rendering operations. The flaw occurs when processing specially crafted WebGL or graphics content, allowing attackers to write data beyond the allocated buffer boundaries in the heap.

The attack requires user interaction—specifically, a victim must navigate to a malicious webpage containing the crafted HTML content. Once triggered, the out-of-bounds memory access can corrupt heap metadata or adjacent memory structures, creating opportunities for further exploitation.

The vulnerability enables an attacker to potentially achieve confidentiality, integrity, and availability impacts on the affected system. Successful exploitation could lead to information disclosure, arbitrary code execution, or denial of service conditions depending on how the corrupted memory is subsequently used by the application.

Root Cause

The root cause of CVE-2024-7532 lies in insufficient bounds checking within the ANGLE graphics layer when processing certain graphics operations. ANGLE translates OpenGL ES calls to platform-native graphics APIs (DirectX on Windows, OpenGL on macOS/Linux), and during this translation process, specific input conditions can cause the component to access memory outside allocated buffer boundaries.

The heap corruption potential arises from the way Chrome's memory allocator manages ANGLE's graphics buffers. When out-of-bounds access occurs, it can overwrite heap management structures or data belonging to other allocations, creating an exploitable memory corruption primitive.

Attack Vector

The attack is network-based and requires user interaction. An attacker can craft a malicious HTML page containing WebGL content or other graphics elements designed to trigger the vulnerability. When a victim browses to this page using a vulnerable version of Google Chrome:

1. The malicious content is parsed and rendered by Chrome
2. ANGLE processes the graphics operations
3. Insufficient bounds checking allows out-of-bounds memory access
4. Heap corruption occurs, potentially allowing arbitrary code execution

The vulnerability can be delivered through various web-based attack vectors including malicious advertisements, compromised websites, or phishing links. For technical details on the specific trigger conditions, refer to the Chromium Issue Tracker Entry.

Detection Methods for CVE-2024-7532

Indicators of Compromise

• Unexpected Chrome browser crashes, particularly when rendering graphics-intensive content
• Chrome crash dumps showing memory corruption in ANGLE-related modules (libGLESv2.dll, libEGL.dll)
• Unusual network connections from Chrome processes following visits to suspicious websites
• Memory access violations or heap corruption errors in Chrome's renderer process

Detection Strategies

• Monitor Chrome version deployments across the enterprise and flag instances running versions prior to 127.0.6533.99
• Deploy endpoint detection solutions capable of identifying memory corruption exploitation patterns in browser processes
• Implement web filtering to block known malicious domains distributing browser exploits
• Review browser crash reports for patterns indicating heap corruption in graphics components

Monitoring Recommendations

• Enable Chrome's built-in crash reporting and security event logging
• Configure SIEM rules to correlate browser crashes with preceding network connections to suspicious domains
• Monitor for child process spawning from Chrome renderer processes that deviate from normal patterns
• Track system calls from browser processes that may indicate post-exploitation activity

How to Mitigate CVE-2024-7532

Immediate Actions Required

• Update Google Chrome to version 127.0.6533.99 or later immediately
• Enable automatic updates for all Chrome installations in the enterprise
• Audit current Chrome versions deployed across all endpoints
• Consider temporary use of alternative browsers if immediate patching is not possible

Patch Information

Google has addressed this vulnerability in Chrome version 127.0.6533.99. The fix implements proper bounds checking in the ANGLE component to prevent out-of-bounds memory access. Organizations should prioritize deployment of this update given the critical severity rating assigned by Chromium security team.

For detailed patch information, see the Google Chrome Stable Update.

Workarounds

• Disable WebGL in Chrome via chrome://flags/#disable-webgl as a temporary mitigation
• Implement strict content security policies to limit exposure to untrusted web content
• Use enterprise browser policies to restrict access to potentially malicious websites
• Deploy network-level protections to filter malicious web content before it reaches endpoints

# Chrome Enterprise Policy - Disable WebGL (Windows Registry)
# HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome
# WebGLAllowed = 0 (DWORD)

# Or via Chrome command line flag for testing:
chrome.exe --disable-webgl