CVE-2023-51971
📋 TL;DR
CVE-2023-51971 is a critical stack overflow vulnerability in Tenda AX1803 routers that allows remote attackers to execute arbitrary code by sending specially crafted requests to the adv.iptv.stbpvid parameter. This affects all users running vulnerable firmware versions of the Tenda AX1803 router. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- Tenda AX1803
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network traffic interception, and lateral movement to connected devices.
Likely Case
Router takeover allowing attackers to modify DNS settings, intercept traffic, or deploy malware to connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access and regular firmware updates are applied.
🎯 Exploit Status
The vulnerability is in a web interface parameter and requires no authentication, making exploitation straightforward.
🛠️ 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 for AX1803
3. Access router admin interface
4. Navigate to firmware update section
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable remote administration
allPrevent external access to router web interface
Restrict WAN access
allConfigure firewall to block external access to router management interface
🧯 If You Can't Patch
- Replace affected router with different model
- Isolate router in separate network segment with strict firewall rules
🔍 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 or SSH if enabled: cat /proc/versionVerify 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 router web interface
- Multiple failed login attempts followed by successful access
- Unexpected firmware modification logs
Network Indicators:
- Unusual outbound connections from router
- DNS hijacking patterns
- Traffic redirection to suspicious IPs
SIEM Query:
source="router_logs" AND (uri="*adv.iptv.stbpvid*" OR method="POST" AND status="200" AND uri="/goform/*")