CVE-2024-3157: Google Chrome Privilege Escalation Flaw

CVE-2024-3157 Overview

CVE-2024-3157 is an out-of-bounds memory access vulnerability in the Compositing component of Google Chrome prior to version 123.0.6312.122. This flaw allows a remote attacker who has already compromised the GPU process to potentially perform a sandbox escape via specific UI gestures. The vulnerability represents a significant security risk as it enables attackers to break out of Chrome's multi-process sandboxing architecture, which is designed to isolate and contain compromised processes.

Critical Impact

A successful exploit could allow an attacker who has compromised the GPU process to escape Chrome's sandbox, potentially gaining elevated access to the underlying system and executing arbitrary code outside the browser's security boundaries.

Affected Products

• Google Chrome versions prior to 123.0.6312.122
• Fedora 38 (via Chromium packages)
• Fedora 39 (via Chromium packages)
• Fedora 40 (via Chromium packages)

Discovery Timeline

• April 10, 2024 - CVE-2024-3157 published to NVD
• March 27, 2025 - Last updated in NVD database

Technical Details for CVE-2024-3157

Vulnerability Analysis

This vulnerability is classified as CWE-787 (Out-of-bounds Write), a memory corruption issue that occurs when the application writes data outside the boundaries of allocated memory buffers. In the context of Chrome's Compositing component, this flaw manifests in how the browser handles GPU-accelerated rendering operations.

The Compositing component in Chrome is responsible for combining multiple layers of content into a single visual output, leveraging GPU acceleration for performance. When an attacker has already compromised the GPU process—a less privileged process within Chrome's multi-process architecture—they can trigger this out-of-bounds memory access through specific UI gestures. This memory corruption primitive can then be leveraged to escape the GPU process sandbox.

Chrome employs a multi-process architecture where the GPU process operates with limited privileges compared to the main browser process. However, this vulnerability allows an attacker to bridge that privilege gap by corrupting memory in a way that enables code execution outside the sandbox constraints.

Root Cause

The root cause of CVE-2024-3157 lies in improper bounds checking within the Compositing component when processing certain rendering operations. The vulnerability occurs when specific UI gestures trigger memory operations that write data beyond the allocated buffer boundaries. This out-of-bounds write can corrupt adjacent memory structures, potentially including security-critical data used for sandbox enforcement.

The Compositing layer handles complex rendering tasks involving multiple visual layers, and insufficient validation of memory access patterns during these operations creates the exploitable condition. When combined with a compromised GPU process, an attacker can craft specific UI interactions that trigger the vulnerable code path.

Attack Vector

The attack requires multiple stages to achieve full exploitation:

1. Initial GPU Process Compromise: The attacker must first compromise the GPU process through a separate vulnerability or attack vector
2. UI Gesture Manipulation: From the compromised GPU process, the attacker triggers specific UI gestures that reach the vulnerable Compositing code
3. Memory Corruption: The out-of-bounds memory access corrupts critical data structures
4. Sandbox Escape: The corrupted memory state is leveraged to break out of the GPU process sandbox

This vulnerability requires user interaction through the specific UI gestures needed to trigger the vulnerable code path. The attack is network-accessible, meaning a malicious webpage could potentially be crafted to execute this attack chain if combined with an initial GPU process compromise.

Detection Methods for CVE-2024-3157

Indicators of Compromise

• Abnormal GPU process behavior or unexpected process crashes in Chrome
• Unusual memory access patterns originating from the browser GPU process
• Evidence of child processes spawned from Chrome with unexpected privileges
• Signs of sandbox escape attempts in browser process monitoring logs
• Chrome crash reports indicating memory corruption in Compositing-related components

Detection Strategies

• Monitor Chrome process hierarchies for unexpected process relationships or privilege escalation
• Implement endpoint detection rules for suspicious GPU process behavior patterns
• Deploy browser-based telemetry to detect abnormal rendering operations
• Configure crash dump analysis to identify memory corruption signatures consistent with CWE-787

Monitoring Recommendations

• Enable Chrome's built-in crash reporting and analyze reports for Compositing-related failures
• Implement process integrity monitoring on endpoints to detect sandbox escape attempts
• Deploy network security monitoring to identify potentially malicious webpages targeting this vulnerability
• Monitor for Chrome version deployments to ensure timely patching across the enterprise

How to Mitigate CVE-2024-3157

Immediate Actions Required

• Update Google Chrome to version 123.0.6312.122 or later immediately
• Enable automatic Chrome updates across all managed endpoints
• Review and update Chromium-based browsers on Fedora 38, 39, and 40 systems
• Consider temporarily restricting access to untrusted websites until patching is complete
• Audit enterprise browser deployments to identify vulnerable Chrome versions

Patch Information

Google has addressed this vulnerability in Chrome version 123.0.6312.122, released as part of the stable channel update on April 10, 2024. The fix corrects the bounds checking issue in the Compositing component to prevent the out-of-bounds memory access.

For detailed patch information, refer to the Google Chrome Stable Update announcement. Technical details about the specific fix can be found in the Chromium Issue Tracker Entry.

Fedora users should apply the relevant security updates:

• Fedora 38 Package Update
• Fedora 39 Package Update
• Fedora 40 Package Update

Workarounds

• If immediate patching is not possible, consider using alternative browsers temporarily for sensitive operations
• Implement web content filtering to restrict access to untrusted or high-risk websites
• Deploy endpoint protection solutions capable of detecting sandbox escape attempts
• Enable site isolation features in Chrome enterprise policies to add additional process separation
• Consider disabling GPU acceleration via Chrome flags (--disable-gpu) as a temporary mitigation, though this will impact rendering performance

# Verify Chrome version on Linux systems
google-chrome --version

# Force Chrome update check
google-chrome --check-for-update-interval=0

# Fedora package update commands
sudo dnf update chromium --refresh