CVE-2022-28908
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on TOTOLink N600R routers via command injection in the ipdoamin parameter. Attackers can gain full control of affected devices, potentially compromising entire networks. Only TOTOLink N600R routers running specific vulnerable firmware are affected.
💻 Affected Systems
- TOTOLink N600R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to network compromise, data exfiltration, lateral movement to other devices, and persistent backdoor installation.
Likely Case
Router compromise allowing traffic interception, DNS hijacking, credential theft, and use as attack platform against internal network.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public exploit code available in GitHub repositories. Simple HTTP POST request with crafted payload can trigger exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not publicly available
Restart Required: No
Instructions:
No official patch available. Check TOTOLink website for firmware updates. If unavailable, implement workarounds.
🔧 Temporary Workarounds
Network Access Restriction
linuxBlock external access to router 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 WAN access to management interface in router settings
🧯 If You Can't Patch
- Segment router on isolated network segment with strict firewall rules
- Implement network monitoring for suspicious HTTP POST requests to /setting/setDiagnosisCfg
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status or About pageCheck Version:
curl -s http://router-ip/cgi-bin/luci/ | grep -i versionVerify Fix Applied:
Verify firmware version is newer than V5.3c.7159_B20190425📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /setting/setDiagnosisCfg with unusual ipdoamin parameter values
- System logs showing unexpected command execution
Network Indicators:
- HTTP traffic to router on port 80/443 containing shell metacharacters in POST data
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router_logs" AND uri="/setting/setDiagnosisCfg" AND (param="ipdoamin" AND value MATCHES "[;&|`$()]+")