CVE-2017-6530
📋 TL;DR
CVE-2017-6530 is an authentication bypass vulnerability in Televes COAXDATA GATEWAY devices that allows unauthenticated attackers to change the administrator password without authorization. This affects Televes COAXDATA GATEWAY 1Gbps devices running specific firmware versions. Attackers can gain complete control of affected devices.
💻 Affected Systems
- Televes COAXDATA GATEWAY 1Gbps
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover allowing attackers to reconfigure network settings, intercept traffic, install malware, or use the device as a pivot point into internal networks.
Likely Case
Unauthorized password change leading to administrative access loss, potential device reconfiguration, and network disruption.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation.
🎯 Exploit Status
Exploitation requires simple HTTP requests to the vulnerable password.shtml endpoint without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown specific version - check with Televes for updated firmware
Vendor Advisory: https://www.tarlogic.com/advisories/Televes_CoaxData_Gateway_en.txt
Restart Required: Yes
Instructions:
1. Contact Televes for updated firmware. 2. Backup current configuration. 3. Upload and apply firmware update. 4. Verify password change functionality requires authentication.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to the device management interface to trusted networks only.
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_NETWORK -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_NETWORK -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Web Interface Disablement
allDisable the web management interface if not required for operations.
Check device documentation for web interface disable commands
🧯 If You Can't Patch
- Isolate affected devices in separate VLAN with strict firewall rules
- Implement network monitoring for unauthorized access attempts to password.shtml endpoint
🔍 How to Verify
Check if Vulnerable:
Attempt to access http://device-ip/password.shtml without authentication. If accessible, device is vulnerable.Check Version:
Check web interface login page or device documentation for firmware version informationVerify Fix Applied:
Verify that accessing password.shtml without authentication returns an authorization error or redirects to login.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access to password.shtml endpoint
- Multiple failed login attempts followed by password change
Network Indicators:
- HTTP POST requests to password.shtml from unauthorized IPs
- Unusual traffic patterns from gateway devices
SIEM Query:
source_ip=* AND url="*/password.shtml" AND http_method=POST AND NOT user_agent="*management-console*"