CVE-2025-2783: Google Chrome Mojo Sandbox Escape RCE Flaw

CVE-2025-2783 Overview

Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to version 134.0.6998.177 allowed a remote attacker to perform a sandbox escape via a malicious file. (Chromium security severity: High)

Critical Impact
This vulnerability permits a remote attacker to execute arbitrary code outside the intended permissions of a sandboxed environment, posing a significant threat of security breaches.

Affected Products

Google Chrome
Microsoft Windows

Discovery Timeline

2025-03-26 - CVE CVE-2025-2783 published to NVD
2025-10-24 - Last updated in NVD database

Technical Details for CVE-2025-2783

Vulnerability Analysis

This vulnerability results from improper handle management within the Mojo component in Chrome. A remote attacker can exploit this flaw by crafting a malicious file that, when processed, allows the attacker to escape the sandboxed environment. The sandbox escape potentially leads to execution of arbitrary code with elevated privileges.

Root Cause

The root cause is attributed to an incorrect handle being provided under unspecified circumstances within the Mojo IPC stack, which facilitates inter-process communications.

Attack Vector

Network

javascript

// Example exploitation code (sanitized)
function exploit() {
    let maliciousFile = createMaliciousMojoHandle();
    sendToChrome(maliciousFile);
}

Detection Methods for CVE-2025-2783

Indicators of Compromise

Unexpected Chrome process crashes
Sandbox escape attempts recorded in logs
Anomalous network requests from Chrome

Detection Strategies

Utilize Endpoint Detection and Response (EDR) solutions like SentinelOne Singularity that monitor system processes and network activity for potential misuse of IPC mechanisms.

Monitoring Recommendations

Enable detailed logging in Chrome to capture suspicious activity
Regularly review network traffic originating from Chrome

How to Mitigate CVE-2025-2783

Immediate Actions Required

Update Google Chrome to the latest version
Monitor network traffic for anomalies
Implement application whitelist policies

Patch Information

Google has released a patch in version 134.0.6998.177 to address this vulnerability. Users are advised to upgrade to the patched version immediately.

Workarounds

Restrict execution of untrusted files from network locations and consider enforcing strict Content Security Policies (CSP).

bash

# Example Linux system configuration to prevent execution from /tmp
chmod 700 /tmp