CVE-2025-2783
📋 TL;DR
This vulnerability in Google Chrome's Mojo IPC system on Windows allows remote attackers to escape the browser sandbox via a malicious file. Users running affected Chrome versions on Windows are at risk. Successful exploitation could lead to full system compromise.
💻 Affected Systems
- Google Chrome
- Chromium-based browsers
📦 What is this software?
Chrome by Google
Google Chrome is the world's most popular web browser, used by over 3 billion users globally across Windows, macOS, Linux, Android, and iOS platforms. As a Chromium-based browser developed by Google, Chrome dominates the browser market with approximately 65% market share, making it a critical compon...
Learn more about Chrome →⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the Windows machine, installing malware, stealing credentials, and accessing all user data.
Likely Case
Malicious actor gains elevated privileges to execute arbitrary code outside Chrome's sandbox, potentially installing ransomware, spyware, or other persistent threats.
If Mitigated
With proper controls like application whitelisting and network segmentation, impact is limited to isolated systems with potential data loss but no lateral movement.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). CISA has added this to Known Exploited Vulnerabilities catalog, indicating active exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 134.0.6998.177 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/03/stable-channel-update-for-desktop_25.html
Restart Required: No
Instructions:
1. Open Chrome. 2. Click three-dot menu → Help → About Google Chrome. 3. Chrome will automatically check for and install updates. 4. Relaunch Chrome if prompted.
🔧 Temporary Workarounds
Disable automatic file downloads
allConfigure Chrome to ask before downloading files to prevent automatic execution of malicious files.
chrome://settings/content/automaticDownloads → Toggle off 'Automatic downloads'
🧯 If You Can't Patch
- Restrict user permissions to prevent execution of arbitrary code
- Implement application control/whitelisting to block unauthorized executables
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: Open Chrome → Click three-dot menu → Help → About Google Chrome. If version is below 134.0.6998.177, you are vulnerable.Check Version:
chrome://version/Verify Fix Applied:
Confirm Chrome version is 134.0.6998.177 or higher using the same About Google Chrome page.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with Mojo-related errors
- Unexpected process creation from chrome.exe
- Windows Event Logs showing unusual privilege escalation
Network Indicators:
- Unusual outbound connections from Chrome processes
- Downloads of suspicious file types from untrusted sources
SIEM Query:
Process Creation where (ParentImage contains 'chrome.exe' OR Image contains 'chrome.exe') AND CommandLine contains unusual parameters