CVE-2020-9370
📋 TL;DR
CVE-2020-9370 is a session hijacking vulnerability in HUMAX HGA12R-02 routers running firmware version 1.1.53. Attackers can steal active user sessions to gain unauthorized access to the router's administrative interface. This affects all users of these specific router models with the vulnerable firmware.
💻 Affected Systems
- HUMAX HGA12R-02
📦 What is this software?
Hga12r 02 Firmware by Humaxdigital
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router configuration, allowing attacker to change network settings, intercept traffic, install malicious firmware, or use the router as an attack platform.
Likely Case
Unauthorized access to router admin panel to change DNS settings, firewall rules, or network credentials.
If Mitigated
Limited impact if strong network segmentation and monitoring are in place, though router compromise still poses significant risk.
🎯 Exploit Status
Exploitation requires an active user session to hijack, but techniques are publicly documented. Attackers need to capture or predict session tokens.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Later than 1.1.53 (check vendor for specific version)
Vendor Advisory: https://uk.humaxdigital.com/network/hga12r-02/
Restart Required: Yes
Instructions:
1. Log into router admin panel. 2. Navigate to firmware update section. 3. Check for available updates. 4. Download and install latest firmware. 5. Reboot router after update completes.
🔧 Temporary Workarounds
Session timeout reduction
allReduce session timeout duration to minimize window for hijacking
Admin interface access restriction
allRestrict admin interface access to specific IP addresses only
🧯 If You Can't Patch
- Replace affected routers with non-vulnerable models
- Implement network segmentation to isolate router management traffic
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is exactly 1.1.53, device is vulnerable.Check Version:
Login to router admin panel and check System Information or Firmware Status pageVerify Fix Applied:
Verify firmware version has been updated to a version later than 1.1.53.📡 Detection & Monitoring
Log Indicators:
- Multiple admin login attempts from different IPs in short time
- Admin access from unexpected IP addresses
- Session ID reuse from different locations
Network Indicators:
- Unusual traffic patterns to router admin port (typically 80/443)
- Multiple session establishment requests
SIEM Query:
source="router_logs" AND (event="admin_login" AND src_ip!=allowed_admin_ips) OR (event="session_creation" AND count()>threshold)