CVE-2024-22662
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on TOTOLINK A3700R routers by exploiting a stack overflow in the setParentalRules function. Attackers can gain full control of affected devices without authentication. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- TOTOLINK A3700R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and participation in botnets.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repositories. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: Yes
Instructions:
1. Check TOTOLINK official website for firmware updates
2. Download latest firmware for A3700R model
3. Access router web interface
4. Navigate to System Tools > Firmware Upgrade
5. Upload new firmware file
6. Wait for automatic reboot
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Implement strict firewall rules to block all inbound traffic to router management interface
- Deploy network intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status > Firmware VersionCheck Version:
curl -s http://router-ip/cgi-bin/luci/ | grep -i versionVerify Fix Applied:
Verify firmware version has been updated to a version newer than V9.1.2u.6165_20211012📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cgi-bin/luci
- Multiple failed exploitation attempts
- Unexpected process execution
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns indicating command and control communication
- Port scanning originating from router
SIEM Query:
source="router.log" AND (uri="/cgi-bin/luci" AND method="POST" AND size>1000)