CVE-2024-35571
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AX1806 routers via a stack overflow in the formSetIptv function. Attackers can exploit this by sending specially crafted requests to the iptv.stb.mode parameter. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- Tenda AX1806
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to router takeover, network traffic interception, lateral movement to connected devices, and persistent backdoor installation.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the router as a pivot point for further attacks.
If Mitigated
Denial of service if exploit fails or is detected by security controls, with potential for temporary service disruption.
🎯 Exploit Status
Detailed technical analysis and proof-of-concept are publicly available. Exploitation requires sending crafted HTTP requests to the router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware. 3. Access router web interface. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Wait for router to reboot.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Network segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace affected routers with different models
- Implement strict firewall rules to block access to router management interface from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at 192.168.0.1 or 192.168.1.1, navigate to System Status or About pageCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is no longer v1.0.0.1 after update📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to formSetIptv endpoint
- Large payloads sent to iptv.stb.mode parameter
- Router crash or reboot logs
Network Indicators:
- HTTP requests with oversized iptv.stb.mode parameters
- Traffic to router management interface from unexpected sources
SIEM Query:
source="router_logs" AND (uri="/goform/formSetIptv" OR parameter="iptv.stb.mode") AND size>1000