CVE-2024-46044
📋 TL;DR
CVE-2024-46044 is a critical stack overflow vulnerability in Tenda CH22 routers that allows remote attackers to execute arbitrary code by sending specially crafted requests to the affected function. This affects all users running the vulnerable firmware version, potentially giving attackers full control of the router.
💻 Affected Systems
- Tenda CH22 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, credential theft, network traffic interception, and lateral movement into connected networks.
Likely Case
Router takeover enabling DNS hijacking, credential harvesting, and botnet recruitment for DDoS attacks.
If Mitigated
Limited impact if device is behind firewall with strict ingress filtering and network segmentation.
🎯 Exploit Status
Public GitHub repository contains technical details and likely exploit code. CVSS 9.8 indicates trivial exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates 2. Download latest firmware 3. Upload via router admin interface 4. Reboot router
🔧 Temporary Workarounds
Network segmentation and isolation
allIsolate CH22 routers from critical networks and restrict access
Access control restrictions
linuxBlock external access to router admin interface using firewall rules
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Replace vulnerable router with different model or vendor
- Implement strict network monitoring for suspicious traffic to/from router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or Firmware Upgrade sectionCheck Version:
curl -s http://router-ip/status.cgi | grep firmwareVerify Fix Applied:
Verify firmware version is no longer V1.0.0.6(468)📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to qossetting functions
- Multiple failed authentication attempts followed by successful exploit
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Traffic patterns indicating command and control
SIEM Query:
source="router.log" AND ("fromqossetting" OR "qossetting") AND status=200