CVE-2019-9119
📋 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 HTTP 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 attackers to install persistent malware, pivot to internal networks, or use the device as part of a botnet.
Likely Case
Remote code execution leading to device compromise, data theft, and potential lateral movement within the network.
If Mitigated
No impact if devices are properly segmented, HNAP interface is disabled, or firmware is patched.
🎯 Exploit Status
Exploitation requires sending a crafted HTTP POST request to /HNAP1 endpoint with shell metacharacters in staticroute_list field.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No known vendor advisory
Restart Required: No
Instructions:
No official patch available. Check Motorola support for firmware updates. If unavailable, implement workarounds.
🔧 Temporary Workarounds
Disable HNAP Interface
allDisable the HNAP web interface if not required for device functionality.
Check device web interface for HNAP/UPnP settings and disable
Use device CLI if available: configure terminal, no hnap enable
Network Segmentation
allIsolate affected devices in separate VLAN with strict firewall rules.
firewall rules to block access to port 80/443 from untrusted networks
Implement network ACLs to restrict HNAP access
🧯 If You Can't Patch
- Segment affected devices in isolated network zones with strict egress filtering
- Implement web application firewall (WAF) rules to block malicious HNAP requests
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI. If running C1 firmware 1.01 or M2 firmware 1.07, device is vulnerable.Check Version:
Check web interface System Information page or use CLI command: show versionVerify Fix Applied:
Test if HNAP interface responds to crafted POST requests with shell metacharacters. If device rejects or sanitizes input, fix may be applied.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /HNAP1 endpoint
- System logs showing unexpected command execution
- Failed authentication attempts to device services
Network Indicators:
- HTTP POST requests to /HNAP1 with shell metacharacters in payload
- Unusual outbound connections from device
- Traffic patterns indicating command and control communication
SIEM Query:
source_ip="device_ip" AND (url_path="/HNAP1" AND http_method="POST" AND (body CONTAINS "|" OR body CONTAINS ";" OR body CONTAINS "`" OR body CONTAINS "$"))