CVE-2020-17466
📋 TL;DR
This vulnerability allows attackers to bypass authentication in Turcom TRCwifiZone devices by accessing the manage/control.php endpoint and ignoring 302 redirect responses. This affects all Turcom TRCwifiZone devices running through August 10, 2020. Attackers can gain unauthorized administrative access without valid credentials.
💻 Affected Systems
- Turcom TRCwifiZone
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the device allowing attackers to reconfigure network settings, intercept traffic, deploy malware, or use the device as a pivot point into internal networks.
Likely Case
Unauthorized administrative access leading to network configuration changes, user data exposure, and potential service disruption.
If Mitigated
Limited impact if device is behind firewalls with strict access controls and network segmentation.
🎯 Exploit Status
Exploitation requires only web browser access to the vulnerable endpoint. No special tools or skills needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2020-08-10
Vendor Advisory: https://www.turcom.com.tr/en/urunlerimiz-sorunsuz-internet-trcwifizone.asp
Restart Required: Yes
Instructions:
1. Log into Turcom support portal. 2. Download latest firmware for your TRCwifiZone model. 3. Access device web interface. 4. Navigate to System > Firmware Upgrade. 5. Upload and apply the new firmware. 6. Reboot device.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to the device management interface to trusted IP addresses only.
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Web Server Configuration
allAdd authentication requirement for manage/control.php endpoint at web server level.
Location /manage/control.php
AuthType Basic
AuthName "Restricted Access"
AuthUserFile /etc/apache2/.htpasswd
Require valid-user
🧯 If You Can't Patch
- Isolate the device on a separate VLAN with strict firewall rules limiting inbound and outbound traffic.
- Disable remote management interface and require physical access for configuration changes.
🔍 How to Verify
Check if Vulnerable:
Attempt to access http://[device_ip]/manage/control.php. If you can access administrative functions without authentication, the device is vulnerable.Check Version:
Check web interface System > Status page or run: curl -s http://[device_ip]/cgi-bin/status | grep FirmwareVerify Fix Applied:
After patching, attempt the same access. You should receive proper authentication challenge or be redirected to login page.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful access to manage/control.php
- Access to manage/control.php without preceding successful login
Network Indicators:
- HTTP GET requests to /manage/control.php without authentication headers
- Unusual administrative configuration changes from unexpected IP addresses
SIEM Query:
source="web_logs" AND (uri="/manage/control.php" AND NOT (status="302" OR auth_success="true"))