CVE-2023-51958
📋 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.stb.port parameter. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- Tenda AX1803
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise leading to complete router takeover, credential theft, network traffic interception, and lateral movement into connected devices.
Likely Case
Remote code execution allowing attackers to install malware, create backdoors, or use the router as part of a botnet.
If Mitigated
If properly segmented and monitored, impact limited to router compromise without lateral movement to other systems.
🎯 Exploit Status
Public technical details available showing buffer overflow exploitation via HTTP requests to the vulnerable parameter.
🛠️ 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. Upload via router admin interface 4. Reboot router
🔧 Temporary Workarounds
Disable remote administration
allPrevent external access to router management interface
Network segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace vulnerable router with different model
- Implement strict firewall rules blocking access to router management interface from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is v1.0.0.1, device is vulnerable.Check Version:
Check via router web interface at 192.168.0.1 or 192.168.1.1Verify Fix Applied:
Verify firmware version has been updated to a version newer than v1.0.0.1📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to router management interface
- Multiple failed buffer overflow attempts in router logs
Network Indicators:
- Unexpected traffic patterns from router
- Router making unusual outbound connections
SIEM Query:
source_ip="router_ip" AND (http_method="POST" AND uri_contains="iptv")