CVE-2024-39273
📋 TL;DR
This vulnerability allows attackers to perform man-in-the-middle attacks to push arbitrary firmware updates to Wavlink AC3000 routers. Attackers can completely compromise affected devices by installing malicious firmware. All users of affected Wavlink AC3000 routers with vulnerable firmware are at risk.
💻 Affected Systems
- Wavlink AC3000 M33A8
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover with persistent backdoor installation, allowing attackers to intercept all network traffic, steal credentials, and use the device as a pivot point into internal networks.
Likely Case
Attackers on the same network segment can push malicious firmware to compromise the router, gaining control over network traffic and connected devices.
If Mitigated
With proper network segmentation and monitoring, impact is limited to isolated network segments with detection of unauthorized firmware update attempts.
🎯 Exploit Status
Requires man-in-the-middle position but no authentication. Exploitation is straightforward once network position is achieved.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Wavlink website for firmware updates
2. Download latest firmware
3. Access router admin interface
4. Navigate to firmware update section
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable automatic firmware updates
allPrevent automatic firmware checks that could be intercepted
Network segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace affected devices with patched alternatives
- Implement strict network monitoring for firmware update attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface. If version is V5030.210505 or earlier, device is vulnerable.Check Version:
Check router web interface at 192.168.10.1 or configured IP, navigate to System Status or Firmware InformationVerify Fix Applied:
Verify firmware version has been updated to a version later than V5030.210505📡 Detection & Monitoring
Log Indicators:
- Unexpected firmware update attempts
- HTTP requests to firmware update endpoints from unusual sources
Network Indicators:
- HTTP traffic to router firmware update endpoints from unexpected IPs
- Unusual firmware download patterns
SIEM Query:
source_ip IN (router_management_ips) AND (url CONTAINS 'firmware' OR url CONTAINS 'update') AND NOT user_agent CONTAINS 'expected_update_agent'