CVE-2024-35580
📋 TL;DR
CVE-2024-35580 is a critical stack buffer overflow vulnerability in Tenda AX1806 routers that allows remote attackers to execute arbitrary code or cause denial of service. Attackers can exploit this by sending specially crafted requests to the vulnerable formSetIptv function. This affects all users of Tenda AX1806 routers with the vulnerable firmware version.
💻 Affected Systems
- Tenda AX1806
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, credential theft, network pivoting, and persistent backdoor installation.
Likely Case
Router crash causing denial of service, potentially requiring physical reset and disrupting network connectivity.
If Mitigated
Limited impact if network segmentation isolates routers and strict access controls prevent external exploitation.
🎯 Exploit Status
The vulnerability requires sending crafted HTTP requests to the router's web interface. Public technical details exist, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. Download the latest firmware for AX1806. 3. Log into router admin interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install the 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 to trusted network
🧯 If You Can't Patch
- Implement strict firewall rules to block external access to router web interface (ports 80/443)
- Monitor router logs for unusual HTTP requests to formSetIptv endpoint
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status. If version is exactly v1.0.0.1, the device is vulnerable.Check Version:
Log into router web interface and navigate to System Status page, or check via SSH if enabled: cat /proc/versionVerify Fix Applied:
After updating firmware, verify the version has changed from v1.0.0.1 to a newer version.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing 'adv.iptv.stbpvid' parameter with unusually long values
- Router crash/reboot logs
- Failed authentication attempts to web interface
Network Indicators:
- Unusual HTTP POST requests to router IP on port 80/443
- Traffic patterns suggesting port scanning of router interfaces
SIEM Query:
source="router_logs" AND ("adv.iptv.stbpvid" OR "formSetIptv") AND (content_length>100 OR status_code=500)