CVE-2017-16887
📋 TL;DR
This vulnerability in FiberHome Mobile WIFI Device Model LM53Q1 allows unauthorized access to SOAP web services, which can lead to disclosure of the WLAN key/password. Attackers can exploit this to gain unauthorized network access. Only users of this specific device model with the vulnerable firmware are affected.
💻 Affected Systems
- FiberHome Mobile WIFI Device Model LM53Q1
📦 What is this software?
Lm53q1 Firmware by Fiberhome
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the wireless network, allowing attackers to intercept all traffic, perform man-in-the-middle attacks, and potentially pivot to connected devices.
Likely Case
Unauthorized users gain access to the wireless network, potentially monitoring traffic and accessing network resources.
If Mitigated
Limited impact if network segmentation isolates the device and strong authentication is required for internal resources.
🎯 Exploit Status
Public exploit code is available on Exploit-DB (ID 43460). The exploit requires no authentication and is simple to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No vendor advisory found
Restart Required: No
Instructions:
No official patch available. Check with FiberHome for firmware updates. If unavailable, implement workarounds or replace device.
🔧 Temporary Workarounds
Disable SOAP web services
allDisable the vulnerable SOAP web service interface if possible through device configuration.
Network segmentation
allIsolate the device on a separate VLAN with strict firewall rules limiting access to the web portal.
🧯 If You Can't Patch
- Replace the device with a non-vulnerable model
- Implement strict network access controls and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version in web interface. If model is LM53Q1 and firmware is VH519R05C01S38, device is vulnerable.Check Version:
Check device web interface or use nmap/curl to query device informationVerify Fix Applied:
Test if SOAP web service still allows unauthorized access to WLAN key. Use the public exploit to verify fix.📡 Detection & Monitoring
Log Indicators:
- Unusual SOAP requests to device web services
- Multiple failed authentication attempts followed by successful WLAN key retrieval
Network Indicators:
- SOAP requests to device port 80/443 from unexpected sources
- Traffic patterns indicating WLAN key exfiltration
SIEM Query:
source_ip=* AND dest_port=80 AND http_method=POST AND uri CONTAINS "/soap" AND user_agent CONTAINS "exploit"