CVE-2018-14010
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary operating system commands on affected Xiaomi routers via OS command injection in the guest Wi-Fi settings feature. Attackers can exploit this by sending crafted JSON data to the /cgi-bin/luci endpoint. Users of vulnerable Xiaomi router models with unpatched firmware are affected.
💻 Affected Systems
- Xiaomi R3P
- Xiaomi R3C
- Xiaomi R3
- Xiaomi R3D
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to install persistent backdoors, intercept all network traffic, pivot to internal network devices, and use the router for botnet activities.
Likely Case
Router takeover leading to DNS hijacking, credential theft from network traffic, and installation of malware on connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access, though internal attackers could still exploit.
🎯 Exploit Status
Public exploit script available on GitHub. Exploitation requires network access to router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: R3P: 2.14.5+, R3C: 2.12.15+, R3: 2.22.15+, R3D: 2.26.4+
Vendor Advisory: Not publicly available
Restart Required: Yes
Instructions:
1. Log into router web interface. 2. Navigate to System Settings > Firmware Update. 3. Check for updates and install latest firmware. 4. Reboot router after update completes.
🔧 Temporary Workarounds
Disable Guest Wi-Fi
allTemporarily disable guest Wi-Fi feature to remove attack vector
Restrict Web Interface Access
linuxConfigure firewall to block external access to router web interface (port 80/443)
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Implement network monitoring for unusual outbound connections from router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Settings > StatusCheck Version:
curl -s http://router-ip/cgi-bin/luci/ | grep -i versionVerify Fix Applied:
Confirm firmware version matches or exceeds patched versions listed above📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cgi-bin/luci with JSON payloads
- System command execution in router logs
- Failed authentication attempts to web interface
Network Indicators:
- Unusual outbound connections from router IP
- DNS queries to suspicious domains from router
- Unexpected port scans originating from router
SIEM Query:
source="router.log" AND (uri="/cgi-bin/luci" AND method="POST" AND size>500) OR (process="sh" OR process="bash")