CVE-2024-30589
📋 TL;DR
This CVE describes a stack overflow vulnerability in Tenda FH1202 routers that allows remote code execution. Attackers can exploit the 'entrys' parameter in the fromAddressNat function to crash the device or execute arbitrary code. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- Tenda FH1202 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing persistent backdoor installation, network traffic interception, and lateral movement to connected devices.
Likely Case
Router crash requiring physical reset, temporary network disruption, or limited code execution for reconnaissance.
If Mitigated
Denial of service with no persistent compromise if proper network segmentation and access controls are implemented.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repositories. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda official website for firmware updates. 2. Download latest firmware for FH1202. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Wait for router to reboot.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router administration interface
Network segmentation
allIsolate router management interface to trusted network segment only
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Implement strict firewall rules blocking all external access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is exactly v1.2.0.14(408), device is vulnerable.Check Version:
Login to router admin interface and check System Status or Firmware Information pageVerify Fix Applied:
After firmware update, verify version has changed from v1.2.0.14(408) to a newer version.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to router management interface
- Router crash/reboot logs
- Memory corruption errors in system logs
Network Indicators:
- Unusual traffic patterns to router management port (typically 80/443)
- Exploit-specific payload patterns in network traffic
SIEM Query:
source="router_logs" AND ("fromAddressNat" OR "entrys" OR "stack overflow")