CVE-2023-51960
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AX1803 routers via a stack overflow in the formGetIptv function. Attackers can exploit this by sending specially crafted requests to the iptv.city.vlan parameter. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- Tenda AX1803
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, and lateral movement to other devices on the network.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as part of a botnet.
If Mitigated
Limited impact if the router is behind a firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
The vulnerability is in a web interface function and requires no authentication. Public technical details are available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: No
Instructions:
Check Tenda's official website for firmware updates. If available, download and flash the latest firmware through the router's web interface.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to the router's web management interface
Network segmentation
allIsolate the router from critical internal networks
🧯 If You Can't Patch
- Replace the router with a different model that receives security updates
- Place the router behind a firewall that blocks all inbound access to its management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface. If version is exactly v1.0.0.1, the device is vulnerable.Check Version:
Check via router web interface at 192.168.0.1 or 192.168.1.1 (default addresses)Verify Fix Applied:
Verify firmware version has been updated to a version later than v1.0.0.1📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to formGetIptv endpoint
- Large payloads in iptv.city.vlan parameter
Network Indicators:
- Exploit attempts to router management port (typically 80/443)
- Unusual outbound connections from router
SIEM Query:
source_ip=router_ip AND (uri_path CONTAINS 'formGetIptv' OR parameter_name='iptv.city.vlan' AND parameter_size>1000)