CVE-2022-30127
📋 TL;DR
This vulnerability in Microsoft Edge (Chromium-based) allows attackers to execute code with elevated privileges by exploiting a race condition (CWE-362). It affects users running vulnerable versions of Microsoft Edge on Windows systems. Successful exploitation could lead to system compromise.
💻 Affected Systems
- Microsoft Edge (Chromium-based)
📦 What is this software?
Edge Chromium by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining SYSTEM-level privileges, allowing installation of malware, data theft, and persistent access.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install unwanted software, or access restricted system resources.
If Mitigated
Limited impact with proper patch management and user account controls in place, potentially reduced to denial of service.
🎯 Exploit Status
Exploitation requires race condition timing and local access. No publicly available exploit code was identified at disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Microsoft Edge version 102.0.1245.33 and later
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-30127
Restart Required: Yes
Instructions:
1. Open Microsoft Edge. 2. Click Settings (three dots) → Help and feedback → About Microsoft Edge. 3. Browser will automatically check for and install updates. 4. Restart Edge when prompted. For enterprise deployments, use Microsoft Edge update channels or Microsoft Endpoint Configuration Manager.
🔧 Temporary Workarounds
Disable Microsoft Edge via Group Policy
windowsTemporarily disable Microsoft Edge while awaiting patch deployment
gpedit.msc → Computer Configuration → Administrative Templates → Windows Components → Microsoft Edge → 'Allow Microsoft Edge to start and load the Start and New Tab page at Windows startup, and each time Microsoft Edge is closed' → Disabled
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized Edge execution
- Use standard user accounts instead of administrative accounts for daily operations
🔍 How to Verify
Check if Vulnerable:
Open Microsoft Edge → Settings → Help and feedback → About Microsoft Edge. Check if version is below 102.0.1245.33.Check Version:
On Windows command line: "reg query "HKEY_CURRENT_USER\Software\Microsoft\Edge\BLBeacon" /v version"Verify Fix Applied:
Confirm Microsoft Edge version is 102.0.1245.33 or higher in About Microsoft Edge page.📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs: Security event 4688 (process creation) showing Edge spawning unexpected child processes
- Application logs showing Edge crashes or unexpected behavior
Network Indicators:
- Unusual outbound connections from Edge process to unexpected destinations
SIEM Query:
Process creation where parent process contains 'msedge.exe' and command line contains suspicious parameters or child process is unexpected system utility