CVE-2024-48416
📋 TL;DR
This buffer overflow vulnerability in Edimax AC1200 routers allows attackers to execute arbitrary code by sending specially crafted requests to the web management interface. Attackers could potentially take full control of affected routers. All users of Edimax BR-6476AC routers with firmware version 1.06 are affected.
💻 Affected Systems
- Edimax AC1200 Wi-Fi 5 Dual-Band Router BR-6476AC
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise leading to persistent backdoor installation, network traffic interception, credential theft, and use as pivot point for attacking internal networks.
Likely Case
Router takeover enabling DNS hijacking, credential harvesting from connected devices, and botnet recruitment.
If Mitigated
Limited impact if router is behind firewall with restricted management interface access and regular monitoring.
🎯 Exploit Status
Exploitation requires access to router management interface. No public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for updated firmware
Vendor Advisory: http://edimax.com
Restart Required: Yes
Instructions:
1. Log into router web interface. 2. Navigate to firmware update section. 3. Download latest firmware from Edimax website. 4. Upload and apply firmware update. 5. Reboot router after update completes.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Restrict Management Interface Access
allLimit web interface access to trusted IP addresses only
🧯 If You Can't Patch
- Replace vulnerable router with supported model
- Place router behind firewall with strict inbound rules blocking management ports
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Status or Administration sectionCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is updated beyond 1.06 and test if /goform/fromSetLanDhcpsClientbinding endpoint behaves normally📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /goform/fromSetLanDhcpsClientbinding with abnormal payload sizes
- Router reboot events following suspicious requests
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Port scanning originating from router
SIEM Query:
source="router_logs" AND (uri="/goform/fromSetLanDhcpsClientbinding" AND content_length>1000)