CVE-2020-10376
📋 TL;DR
CVE-2020-10376 allows remote attackers to intercept and decode administrator passwords for Technicolor TC7337NET routers by sniffing network traffic for HTTP Basic Authentication headers. This affects users of Technicolor TC7337NET devices running vulnerable firmware versions. Attackers can gain administrative access to the router configuration interface.
💻 Affected Systems
- Technicolor TC7337NET
📦 What is this software?
Tc7337net Firmware by Technicolor
⚠️ Risk & Real-World Impact
Worst Case
Full router compromise allowing attackers to change DNS settings, intercept all network traffic, install malware, or use the router as an attack platform.
Likely Case
Unauthorized access to router admin panel leading to network configuration changes, credential theft, or denial of service.
If Mitigated
Limited impact if HTTPS is enforced and network segmentation prevents sniffing attacks.
🎯 Exploit Status
Exploitation requires network sniffing capability but no authentication. Tools like Wireshark or tcpdump can capture credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not publicly available
Restart Required: No
Instructions:
No official patch available. Check Technicolor support for firmware updates. Consider replacing vulnerable devices.
🔧 Temporary Workarounds
Disable HTTP admin access
allDisable HTTP access to admin interface and use HTTPS only if supported
Router-specific configuration - check admin interface settings
Network segmentation
allIsolate router management interface to separate VLAN
Network switch configuration required
🧯 If You Can't Patch
- Replace vulnerable Technicolor TC7337NET routers with updated models from different vendors
- Implement strict network monitoring for unauthorized access attempts to router admin interface
🔍 How to Verify
Check if Vulnerable:
Check if router admin interface uses HTTP Basic Authentication without HTTPS. Use network sniffer to capture traffic to router IP on port 80/8080.Check Version:
Login to router admin interface and check firmware version in system settingsVerify Fix Applied:
Verify HTTPS is enforced for admin access and no HTTP Basic Authentication headers are transmitted in cleartext.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts
- Successful logins from unusual IP addresses
- Configuration changes from unauthorized users
Network Indicators:
- HTTP traffic containing 'Authorization: Basic' headers to router IP
- Unencrypted admin interface access
SIEM Query:
source_ip="router_ip" AND http_header="Authorization: Basic"