CVE-2024-43558
📋 TL;DR
This vulnerability in the Windows Mobile Broadband Driver allows an attacker to cause a denial of service (system crash/BSOD) by sending specially crafted network packets. It affects Windows systems with mobile broadband hardware or drivers installed. Attackers need local network access to exploit this vulnerability.
💻 Affected Systems
- Windows Mobile Broadband Driver
📦 What is this software?
Windows 10 1809 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 21h2 by Microsoft
Windows 11 21h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash requiring reboot, potentially disrupting critical services on affected systems.
Likely Case
Temporary denial of service affecting mobile broadband connectivity until system reboot.
If Mitigated
Minimal impact with proper network segmentation and patching in place.
🎯 Exploit Status
Exploitation requires sending specially crafted packets to the vulnerable driver, which can be done from the local network without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific KB numbers
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43558
Restart Required: Yes
Instructions:
1. Open Windows Update Settings
2. Click 'Check for updates'
3. Install all available security updates
4. Restart the system when prompted
🔧 Temporary Workarounds
Disable Mobile Broadband Adapter
windowsTemporarily disable mobile broadband hardware to prevent exploitation
Device Manager > Network adapters > Right-click mobile broadband adapter > Disable device
Network Segmentation
allIsolate systems with mobile broadband adapters from untrusted networks
🧯 If You Can't Patch
- Segment affected systems from untrusted networks
- Disable mobile broadband adapters if not required for operations
🔍 How to Verify
Check if Vulnerable:
Check if system has mobile broadband hardware/drivers installed via Device Manager > Network adaptersCheck Version:
wmic os get caption, version, buildnumberVerify Fix Applied:
Verify Windows Update history shows the relevant security update installed📡 Detection & Monitoring
Log Indicators:
- System crash/BSOD events in Event Viewer
- Unexpected driver crashes in System logs
Network Indicators:
- Unusual network traffic to mobile broadband interfaces
- Multiple connection attempts to mobile broadband ports
SIEM Query:
EventID=41 OR EventID=1001 OR Source='Kernel-Power' OR Source='BugCheck'