CVE-2023-33143
📋 TL;DR
This vulnerability in Microsoft Edge (Chromium-based) allows attackers to gain elevated privileges on affected systems. It affects users running vulnerable versions of Microsoft Edge on Windows systems. Successful exploitation could enable attackers to execute arbitrary code with higher privileges than intended.
💻 Affected Systems
- Microsoft Edge (Chromium-based)
📦 What is this software?
Edge Chromium by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains SYSTEM-level privileges, enabling complete system compromise, data theft, and persistent backdoor installation.
Likely Case
Attacker gains elevated user privileges, enabling lateral movement, credential theft, and installation of additional malware.
If Mitigated
With proper patch management and least privilege principles, impact is limited to isolated browser compromise without system-wide escalation.
🎯 Exploit Status
Requires user interaction (visiting malicious website) and specific conditions to trigger privilege escalation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 114.0.1823.37 and later
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-33143
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.
🔧 Temporary Workarounds
Disable Edge via Group Policy
windowsTemporarily disable Microsoft Edge while awaiting patch deployment
gpedit.msc → Computer Configuration → Administrative Templates → Windows Components → Microsoft Edge → Set 'Allow Microsoft Edge to start and load the Start and New Tab page at Windows startup, and each time Microsoft Edge is closed' to Disabled
Use alternative browser
allSwitch to alternative browser until Edge is patched
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized Edge execution
- Configure Edge to run in sandboxed mode with reduced privileges
🔍 How to Verify
Check if Vulnerable:
Open Edge → Settings → About Microsoft Edge → Check if version is below 114.0.1823.37Check Version:
msedge --versionVerify Fix Applied:
Open Edge → Settings → About Microsoft Edge → Confirm version is 114.0.1823.37 or higher📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs: Security logs showing unexpected privilege escalation
- Edge crash reports with suspicious memory patterns
Network Indicators:
- Unusual outbound connections from Edge process
- Traffic to known exploit hosting domains
SIEM Query:
source="Windows Security" EventID=4688 ProcessName="msedge.exe" AND NewProcessName contains "SYSTEM" OR "Administrator"