CVE-2024-0298
📋 TL;DR
This critical vulnerability in Totolink N200RE routers allows remote attackers to execute arbitrary operating system commands via command injection in the setDiagnosisCfg function. Attackers can exploit this to gain full control of affected devices. All users of Totolink N200RE routers with vulnerable firmware are affected.
💻 Affected Systems
- Totolink N200RE
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, pivot to internal networks, intercept traffic, or use device in botnets.
Likely Case
Remote code execution leading to device takeover, credential theft, and network surveillance.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Exploit code is publicly available and requires no authentication. Attack is straightforward to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor was contacted but did not respond. Consider replacing affected devices.
🔧 Temporary Workarounds
Network Isolation
allPlace affected routers behind firewalls with strict inbound filtering to block access to vulnerable CGI endpoint.
Access Control
allRestrict administrative access to trusted IP addresses only using router firewall rules.
🧯 If You Can't Patch
- Immediately isolate affected devices from internet and critical internal networks
- Replace vulnerable Totolink N200RE routers with supported, patched alternatives
🔍 How to Verify
Check if Vulnerable:
Check router web interface for firmware version 9.3.5u.6139_B20201216. If present, device is vulnerable.Check Version:
Login to router admin interface and check firmware version in System Status or similar section.Verify Fix Applied:
No fix available to verify. Only complete mitigation is device replacement.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cgi-bin/cstecgi.cgi with setDiagnosisCfg parameter
- Suspicious command execution patterns in system logs
Network Indicators:
- Unexpected outbound connections from router to external IPs
- Traffic spikes from router to command-and-control servers
SIEM Query:
source="router_logs" AND (uri="/cgi-bin/cstecgi.cgi" AND params CONTAINS "setDiagnosisCfg")