CVE-2024-44859
📋 TL;DR
CVE-2024-44859 is a stack buffer overflow vulnerability in the formWrlExtraGet function of Tenda FH1201 routers. This allows attackers to execute arbitrary code remotely by sending specially crafted requests. Users of Tenda FH1201 routers with vulnerable firmware are affected.
💻 Affected Systems
- Tenda FH1201
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, persistence, and lateral movement within the network.
Likely Case
Router compromise allowing traffic interception, DNS hijacking, or botnet recruitment.
If Mitigated
Denial of service or limited information disclosure if exploit fails or is partially successful.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repository, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. If update available, download and install via router admin interface. 3. Reboot router after update.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router administration interface
Network segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace vulnerable 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 via admin interface at 192.168.0.1 or 192.168.1.1Check Version:
Check router web interface or use nmap to identify device and versionVerify Fix Applied:
Verify firmware version is no longer v1.2.0.14 after update📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to formWrlExtraGet endpoint
- Router crash/restart logs
Network Indicators:
- Malformed HTTP requests to router management interface
- Unusual outbound connections from router
SIEM Query:
source="router_logs" AND (uri="*/formWrlExtraGet" OR message="*buffer overflow*")