CVE-2021-0066
📋 TL;DR
This vulnerability allows an unauthenticated attacker with local access to a system to escalate privileges by exploiting improper input validation in Intel Wi-Fi firmware. It affects systems with Intel PROSet/Wireless Wi-Fi firmware across multiple operating systems and Killer Wi-Fi in Windows 10 and 11. Attackers could gain elevated system privileges without authentication.
💻 Affected Systems
- Intel PROSet/Wireless Wi-Fi firmware
- Killer Wi-Fi
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative privileges, enabling installation of persistent malware, data theft, and lateral movement within the network.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install additional tools, and access sensitive system resources.
If Mitigated
Limited impact with proper network segmentation and endpoint protection, though local privilege escalation remains possible.
🎯 Exploit Status
Requires local access to the system but no authentication. Exploitation involves firmware-level manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Intel driver versions 22.40.0 and later for Windows, various firmware updates for other platforms
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00539.html
Restart Required: Yes
Instructions:
1. Download latest Intel Wi-Fi driver from Intel website or Windows Update. 2. Install the driver update. 3. Restart the system. 4. For Killer Wi-Fi, ensure latest drivers from Intel or OEM are installed.
🔧 Temporary Workarounds
Disable vulnerable Wi-Fi adapter
windowsTemporarily disable the affected Wi-Fi adapter to prevent exploitation
netsh interface set interface "Wi-Fi" admin=disable
Use wired network only
allDisable Wi-Fi functionality and use wired Ethernet connections
🧯 If You Can't Patch
- Implement strict network segmentation to limit lateral movement
- Deploy endpoint detection and response (EDR) solutions to monitor for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Intel Wi-Fi driver version in Device Manager (Windows) or using 'lspci -v' and firmware version checks (Linux). Compare against patched versions.Check Version:
Windows: Get-WmiObject Win32_PnPSignedDriver | Where-Object {$_.DeviceName -like "*Wi-Fi*"} | Select-Object DeviceName, DriverVersionVerify Fix Applied:
Verify driver version is 22.40.0 or later for Windows, or check firmware version against Intel's patched versions for other platforms.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- Wi-Fi driver/firmware modification attempts
- Suspicious local system access patterns
Network Indicators:
- Unusual local network traffic from previously low-privileged accounts
SIEM Query:
EventID=4688 AND (ProcessName LIKE "%wlan%" OR ProcessName LIKE "%wifi%") AND NewProcessName LIKE "%cmd%" OR NewProcessName LIKE "%powershell%")