CVE-2022-24169
📋 TL;DR
CVE-2022-24169 is a stack overflow vulnerability in Tenda G1 and G3 routers that allows attackers to cause a Denial of Service (DoS) by sending specially crafted requests to the formIPMacBindAdd function. This affects users of specific Tenda router models running vulnerable firmware versions. Attackers can crash the router's web interface or potentially execute arbitrary code.
💻 Affected Systems
- Tenda G1 Router
- Tenda G3 Router
📦 What is this software?
G1 Firmware by Tendacn
G3 Firmware by Tendacn
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, network traffic interception, and lateral movement into connected devices.
Likely Case
Denial of Service causing router reboot or web interface crash, disrupting network connectivity.
If Mitigated
Limited to DoS with quick recovery if proper network segmentation and monitoring are in place.
🎯 Exploit Status
Proof of concept code is publicly available on GitHub. Exploitation requires network access to the router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Tenda website for latest firmware updates
Vendor Advisory: Not publicly documented by vendor
Restart Required: Yes
Instructions:
1. Log into router admin interface. 2. Navigate to System Tools > Firmware Upgrade. 3. Download latest firmware from Tenda website. 4. Upload and install firmware. 5. Reboot router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to trusted network
🧯 If You Can't Patch
- Replace affected routers with updated models or different vendors
- Implement strict firewall rules to limit access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or Firmware Upgrade sectionCheck Version:
Login to router web interface and navigate to System Status pageVerify Fix Applied:
Verify firmware version has been updated to a version newer than v15.11.0.17(9502)_CN📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts
- Unusual POST requests to formIPMacBindAdd endpoint
- Router reboot logs
Network Indicators:
- Unusual traffic to router management port (typically 80/443)
- Large payloads sent to router IP
SIEM Query:
source="router_logs" AND (uri="/goform/formIPMacBindAdd" OR message="reboot")