CVE-2024-48420
📋 TL;DR
This buffer overflow vulnerability in Edimax AC1200 routers allows attackers to execute arbitrary code by sending specially crafted requests to the /goform/getWifiBasic endpoint. All users of Edimax BR-6476AC router version 1.06 are affected, potentially giving attackers full control of the device.
💻 Affected Systems
- Edimax AC1200 Wi-Fi 5 Dual-Band Router BR-6476AC
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, credential theft, network traffic interception, and lateral movement to internal systems.
Likely Case
Router takeover allowing attackers to modify DNS settings, intercept traffic, or use the router as a pivot point for further attacks.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access and strong authentication requirements.
🎯 Exploit Status
Exploitation requires network access to the router's web interface but no authentication. Buffer overflow exploitation requires specific technical knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with vendor for updated firmware
Vendor Advisory: http://edimax.com
Restart Required: Yes
Instructions:
1. Log into router admin 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 administration
allPrevents external attackers from accessing the vulnerable endpoint
Restrict web interface access
allLimit access to router admin interface to trusted IP addresses only
🧯 If You Can't Patch
- Replace vulnerable router with updated model
- Place router behind firewall with strict inbound rules
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is 1.06, device is vulnerable.Check Version:
Check via router web interface or SSH if availableVerify Fix Applied:
Verify firmware version has been updated to a version higher than 1.06📡 Detection & Monitoring
Log Indicators:
- Multiple failed requests to /goform/getWifiBasic
- Unusual POST requests with large payloads to router interface
Network Indicators:
- Unusual traffic patterns from router to external IPs
- DNS changes not initiated by administrator
SIEM Query:
source="router_logs" AND (uri="/goform/getWifiBasic" OR method="POST" AND size>1000)