CVE-2024-46046
📋 TL;DR
CVE-2024-46046 is a critical stack overflow vulnerability in Tenda FH451 routers that allows remote code execution. Attackers can exploit this by sending specially crafted packets to the RouteStatic function, potentially gaining full control of affected devices. This affects all users of Tenda FH451 v1.0.0.9 routers.
💻 Affected Systems
- Tenda FH451
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and botnet recruitment.
Likely Case
Remote code execution allowing attacker to modify router settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if device is behind firewall with strict inbound filtering and not internet-facing.
🎯 Exploit Status
Public GitHub repository contains detailed analysis and likely exploit code. The vulnerability requires no authentication and has a simple exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates 2. Download latest firmware 3. Access router admin interface 4. Navigate to firmware upgrade section 5. Upload and apply new firmware 6. Reboot router
🔧 Temporary Workarounds
Network Segmentation
allPlace router behind firewall with strict inbound filtering to block external exploitation attempts
Access Control
allRestrict administrative access to trusted IP addresses only
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Isolate router in separate VLAN with minimal network access
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is exactly v1.0.0.9, device is vulnerable.Check Version:
Check via router web interface or SSH if enabled: cat /proc/version or show version commandsVerify Fix Applied:
Verify firmware version has changed from v1.0.0.9 to a newer version after update.📡 Detection & Monitoring
Log Indicators:
- Unusual traffic to router management interface
- Multiple failed exploit attempts
- Unexpected process execution
Network Indicators:
- Malformed packets targeting router management ports
- Unusual outbound connections from router
SIEM Query:
source_ip="router_ip" AND (event_type="exploit_attempt" OR process="unexpected_executable")