Google Chrome Mojo IPC Insufficient Data Validation Sandbox Escape Vulnerability (CVE-2022-3075)

1. Vulnerability Overview & Root Cause

This vulnerability (CVE-2022-3075) is an insufficient data validation issue (CWE-20) within the Mojo IPC (Inter-Process Communication) framework of Google Chrome. Chromium's architecture relies on isolating untrusted renderer processes inside a sandbox. To perform privileged operations, these renderers communicate with the browser process via Mojo. Due to inadequate validation of incoming Mojo messages, a compromised renderer process can send malformed data that triggers memory corruption or logical flaws in the browser process.

2. Exploitation Mechanics & Attack Scenario

To exploit this vulnerability, an attacker must first compromise the renderer process, typically by exploiting a separate rendering engine vulnerability via a malicious web page. Once control over the renderer is established, the attacker sends specially crafted Mojo IPC messages to the browser process. Because the browser process fails to properly validate this input, the attacker can trigger out-of-bounds behavior, escaping the sandbox boundaries and executing arbitrary code with the privileges of the browser process on the host OS.

3. Infrastructure & Business Impact

As a vulnerability listed in the CISA KEV (Known Exploited Vulnerabilities) catalog, this flaw has been actively exploited in the wild. Successful exploitation allows complete compromise of the user's workstation upon visiting a malicious website. This poses a severe threat to enterprise environments, potentially leading to initial access for ransomware deployment, credential theft, and lateral movement within internal networks.