CVE-2024-3882
📋 TL;DR
This is a critical stack-based buffer overflow vulnerability in Tenda W30E routers that allows remote attackers to execute arbitrary code by manipulating the 'page' parameter in the fromRouteStatic function. Attackers can exploit this without authentication to potentially take full control of affected devices. All users of Tenda W30E routers running version 1.0.1.25(633) are affected.
💻 Affected Systems
- Tenda W30E
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, lateral movement to internal networks, persistent backdoor installation, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept network traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering, though internal network exposure remains a concern.
🎯 Exploit Status
Public exploit code is available in GitHub repositories. The vulnerability requires minimal technical skill to exploit due to the published proof-of-concept.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: Yes
Instructions:
No official patch is available. Consider replacing affected devices or implementing network-level mitigations.
🔧 Temporary Workarounds
Network Access Control
linuxBlock external access to the router's web interface using firewall rules
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable Remote Management
allTurn off remote management features in router settings if available
🧯 If You Can't Patch
- Isolate affected routers in a separate VLAN with strict network segmentation
- Implement network monitoring and intrusion detection for traffic to/from affected devices
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface at System Status > Firmware VersionCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is no longer 1.0.1.25(633) - though no patch exists📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/fromRouteStatic with long parameter values
- Multiple failed buffer overflow attempts in system logs
Network Indicators:
- HTTP requests with unusually long 'page' parameter values
- Traffic patterns suggesting exploit delivery to router management interface
SIEM Query:
source="router_logs" AND uri="/goform/fromRouteStatic" AND (param_length>100 OR status_code=500)🔗 References
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/W30E/fromRouteStatic.md
- https://vuldb.com/?ctiid.260916
- https://vuldb.com/?id.260916
- https://vuldb.com/?submit.312825
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/W30E/fromRouteStatic.md
- https://vuldb.com/?ctiid.260916
- https://vuldb.com/?id.260916
- https://vuldb.com/?submit.312825
