CVE-2017-7315
📋 TL;DR
This vulnerability allows unauthenticated attackers to download router backup files containing plaintext credentials on Humax Digital HG100R devices. Attackers can extract administrative credentials and gain full control of affected routers. Only users of Humax Digital HG100R routers with vulnerable firmware are affected.
💻 Affected Systems
- Humax Digital HG100R
📦 What is this software?
Hg100r Firmware by Humaxdigital
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attackers to intercept all network traffic, redirect DNS, install malware, and use the router as a pivot point into the internal network.
Likely Case
Attackers gain administrative access to the router, change settings, monitor network traffic, and potentially compromise connected devices.
If Mitigated
If network segmentation isolates the router management interface and strong perimeter controls exist, impact is limited to router configuration changes.
🎯 Exploit Status
Exploitation requires only HTTP requests to download the backup file and parsing the plaintext credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider replacing affected devices with supported models.
🔧 Temporary Workarounds
Disable remote management
allDisable WAN-side access to router management interface
Change default credentials
allChange router administrative credentials to strong, unique passwords
🧯 If You Can't Patch
- Replace affected routers with supported models from different vendors
- Implement network segmentation to isolate router management interface
🔍 How to Verify
Check if Vulnerable:
Attempt to download GatewaySettings.bin backup file via HTTP without authentication from router IPCheck Version:
Check router web interface or documentation for firmware versionVerify Fix Applied:
Verify backup file download requires authentication or returns error📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful backup file download
- Unauthenticated requests to backup/download endpoints
Network Indicators:
- HTTP GET requests to router IP for GatewaySettings.bin or backup endpoints without authentication headers
SIEM Query:
source_ip="router_ip" AND (uri="*GatewaySettings.bin*" OR uri="*backup*" OR uri="*download*") AND NOT auth_success="true"