CVE-2024-52723
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on TOTOLINK X6000R routers by exploiting insufficient parameter filtering in the shttpd file's Uci_Set Str function. Attackers can achieve full system compromise without authentication. All users running the affected firmware version are vulnerable.
💻 Affected Systems
- TOTOLINK X6000R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router takeover allowing attackers to intercept all network traffic, install persistent malware, pivot to internal networks, and brick the device.
Likely Case
Router compromise leading to credential theft, DNS hijacking, man-in-the-middle attacks, and botnet recruitment.
If Mitigated
Limited impact if device is behind strict firewall rules, not internet-facing, and network segmentation prevents lateral movement.
🎯 Exploit Status
Public proof-of-concept exists in GitHub gist. Exploitation requires crafting specific HTTP requests to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://x6000r.com
Restart Required: Yes
Instructions:
1. Check vendor website for updated firmware. 2. Download and verify firmware. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload new firmware file. 6. Wait for reboot and verify version.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router administration interface
Restrict Access with Firewall
linuxBlock external access to router web interface ports (typically 80/443)
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict access controls
- Implement network monitoring for suspicious HTTP requests to router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status or About pageCheck Version:
curl -s http://router-ip/cgi-bin/luci/ | grep -i versionVerify Fix Applied:
Verify firmware version has changed from V9.4.0cu.1041_B20240224📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to shttpd endpoints
- Multiple failed login attempts followed by successful command execution patterns
Network Indicators:
- HTTP requests containing shell metacharacters or command injection patterns to router IP
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router.log" AND ("Uci_Set" OR "shttpd") AND (cmd.exe OR /bin/sh OR wget OR curl)