CVE-2024-2980
📋 TL;DR
This critical vulnerability in Tenda FH1202 routers allows remote attackers to execute arbitrary code via a stack-based buffer overflow in the formexeCommand function. Attackers can exploit this without authentication to potentially take full control of affected devices. All users of Tenda FH1202 firmware version 1.2.0.14(408) are affected.
💻 Affected Systems
- Tenda FH1202
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to internal networks, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify device configuration, intercept traffic, or use the device as a pivot point into internal networks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering, though internal exploitation risk remains.
🎯 Exploit Status
Public exploit code is available in GitHub repositories. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor has not responded to disclosure. Consider replacing affected devices or implementing strict network controls.
🔧 Temporary Workarounds
Network Segmentation and Access Control
linuxBlock external access to the router's web interface and restrict internal access to trusted networks only.
iptables -A INPUT -p tcp --dport 80 -s ! TRUSTED_NETWORK -j DROP
iptables -A INPUT -p tcp --dport 443 -s ! TRUSTED_NETWORK -j DROP
Disable Remote Management
allEnsure remote management features are disabled in router settings.
🧯 If You Can't Patch
- Immediately isolate affected routers in a dedicated VLAN with strict egress filtering
- Replace Tenda FH1202 routers with devices from vendors that provide security updates
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at http://router_ip/ or using command: curl -s http://router_ip/goform/getStatus | grep versionCheck Version:
curl -s http://router_ip/goform/getStatus | grep -o '"version":"[^"]*"'Verify Fix Applied:
No fix available to verify. Monitor for vendor updates and check if version changes from 1.2.0.14(408).📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/execCommand
- Large payloads in requests to vulnerable endpoint
- Device reboots or configuration changes not initiated by administrators
Network Indicators:
- Unusual outbound connections from router to external IPs
- Traffic patterns suggesting device compromise (C2 communications)
- Port scanning originating from router
SIEM Query:
source="router_logs" AND (uri="/goform/execCommand" OR cmdinput=*)🔗 References
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/FH/FH1202/formexeCommand.md
- https://vuldb.com/?ctiid.258149
- https://vuldb.com/?id.258149
- https://vuldb.com/?submit.301270
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/FH/FH1202/formexeCommand.md
- https://vuldb.com/?ctiid.258149
- https://vuldb.com/?id.258149
- https://vuldb.com/?submit.301270
