CVE-2024-49099
📋 TL;DR
This vulnerability in Windows Wireless Wide Area Network Service (WwanSvc) allows an authenticated attacker to read sensitive information from system memory. It affects Windows systems with WWAN capabilities, potentially exposing credentials or other sensitive data to local users.
💻 Affected Systems
- Windows Wireless Wide Area Network Service
📦 What is this software?
Windows 10 1809 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker could read sensitive information like credentials, encryption keys, or other protected data from kernel memory, leading to privilege escalation or lateral movement.
Likely Case
A local authenticated user could read limited sensitive information from memory, potentially exposing some system data but unlikely to cause immediate system compromise.
If Mitigated
With proper access controls and network segmentation, the impact is limited to information disclosure within the local system context.
🎯 Exploit Status
Requires local authenticated access and knowledge of memory structures. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: July 2024 security updates (KB5040442 for Windows 11, KB5040437 for Windows 10, etc.)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49099
Restart Required: Yes
Instructions:
1. Open Windows Update Settings. 2. Click 'Check for updates'. 3. Install the July 2024 security updates. 4. Restart the system when prompted.
🔧 Temporary Workarounds
Disable WWAN Service
windowsDisable the Wireless Wide Area Network Service if not needed
sc config WwanSvc start= disabled
sc stop WwanSvc
🧯 If You Can't Patch
- Restrict local user access to systems with WWAN capabilities
- Implement network segmentation to limit lateral movement from compromised systems
🔍 How to Verify
Check if Vulnerable:
Check if WwanSvc service is running and system has July 2024 patches installedCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify July 2024 security updates are installed via 'winver' or 'systeminfo' command📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to WwanSvc
- Multiple failed attempts to access protected memory regions
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
EventID=4688 AND ProcessName LIKE '%wwansvc%' AND CommandLine CONTAINS 'memory'