CVE-2019-9117
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary operating system commands with root privileges on affected Motorola C1 and M2 devices. Attackers can exploit it by sending a specially crafted POST request to the HNAP1 interface, enabling complete device compromise. Only Motorola C1 and M2 devices with specific vulnerable firmware versions are affected.
💻 Affected Systems
- Motorola C1
- Motorola M2
📦 What is this software?
C1 Firmware by Motorola
M2 Firmware by Motorola
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover with root shell access, allowing installation of persistent malware, data theft, network pivoting, and device bricking.
Likely Case
Remote code execution leading to device compromise, credential harvesting, and participation in botnets.
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
Exploit requires network access to device's HNAP1 interface but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check Motorola support for firmware updates. If available, download and install latest firmware via device management interface.
🔧 Temporary Workarounds
Disable HNAP1 Interface
linuxDisable the vulnerable HNAP1 service to prevent exploitation.
Check device documentation for HNAP1 disable procedure
Network Segmentation
linuxIsolate affected devices in separate network segments with strict firewall rules.
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit HNAP1 interface access to trusted IPs only
- Monitor network traffic for exploitation attempts and unusual HNAP1 requests
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or SSH. For C1 verify version is 1.01, for M2 verify version is 1.07.Check Version:
Check via device web interface at System > Firmware or similar menuVerify Fix Applied:
Verify firmware version has been updated to a version later than the vulnerable ones mentioned.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /HNAP1
- System logs showing unexpected command execution
- Failed authentication attempts to device services
Network Indicators:
- POST requests to /HNAP1 with shell metacharacters in tomography_ping_number field
- Unexpected outbound connections from device
SIEM Query:
source="device_logs" AND (url="/HNAP1" AND method="POST" AND (body CONTAINS "tomography_ping_number" AND (body CONTAINS ";" OR body CONTAINS "|" OR body CONTAINS "`")))