CVE-2023-51962
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AX1803 routers by exploiting a stack overflow in the setIptvInfo function. Attackers can send specially crafted requests to the iptv.stb.mode parameter, potentially gaining full control of affected devices. This affects users running vulnerable firmware versions.
💻 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, lateral movement to other devices, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device for DDoS attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
The vulnerability is in a web interface function and requires no authentication. Public technical details exist.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
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. Reboot router.
🔧 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 devices with patched or alternative models
- Implement strict network access controls to limit exposure
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status or About pageCheck Version:
No CLI command - check via web interface at http://router_ipVerify Fix Applied:
Verify firmware version is updated beyond v1.0.0.1📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to setIptvInfo endpoint
- Multiple failed login attempts followed by successful exploitation
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns suggesting device compromise
SIEM Query:
source_ip="router_ip" AND (uri_path="/goform/setIptvInfo" OR user_agent="malicious_payload")