CVE-2024-48418
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary shell commands on Edimax AC1200 routers by injecting special characters into DDNS configuration parameters. It affects users of the BR-6476AC router with firmware version 1.06 who have web interface access. Successful exploitation gives attackers full control of the router.
💻 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 allowing attacker to intercept all network traffic, install persistent backdoors, pivot to internal network devices, and use router as attack platform.
Likely Case
Router takeover enabling traffic monitoring, DNS hijacking, credential theft from connected devices, and disruption of network services.
If Mitigated
Limited impact if router is behind firewall with restricted web interface access and strong authentication.
🎯 Exploit Status
Exploitation requires web interface access and knowledge of command injection techniques. No public exploit code available at time of analysis.
🛠️ 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 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 DDNS Service
allTurn off Dynamic DNS functionality to remove vulnerable endpoint
Restrict Web Interface Access
allLimit web interface access to trusted IP addresses only
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Disable remote management and ensure web interface is only accessible from internal network
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Status or Administration sectionCheck Version:
Login to router web interface and check firmware version in system informationVerify Fix Applied:
Verify firmware version is updated beyond 1.06 and test DDNS functionality with special characters📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/fromSetDDNS with special characters
- Multiple failed authentication attempts followed by DDNS requests
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- DNS queries to suspicious domains from router
SIEM Query:
source="router" AND (uri="/goform/fromSetDDNS" AND (payload CONTAINS "|" OR payload CONTAINS ";" OR payload CONTAINS "`"))