CVE-2024-42748
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary operating system commands on TOTOLINK X5000r routers through command injection in the WiFi WPS configuration function. Attackers with valid credentials can send specially crafted packets to gain full system control. Only users of the specific router model and firmware version are affected.
💻 Affected Systems
- TOTOLINK X5000r
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing installation of persistent backdoors, credential theft, network pivoting to internal systems, and participation in botnets.
Likely Case
Router takeover leading to DNS hijacking, credential interception, and network traffic monitoring.
If Mitigated
Limited impact if strong authentication controls and network segmentation prevent unauthorized access to router management interface.
🎯 Exploit Status
Public GitHub repository contains detailed exploitation methodology and proof-of-concept.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check TOTOLINK 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
Disable WPS functionality
allTurn off WiFi Protected Setup feature to remove vulnerable code path
Restrict management interface access
allLimit router admin access to specific IP addresses or disable remote management
🧯 If You Can't Patch
- Segment router management interface to isolated VLAN with strict access controls
- Implement network monitoring for unusual outbound connections or command execution patterns
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface and compare with vulnerable version v9.1.0cu.2350_b20230313Check Version:
Login to router admin interface and navigate to System Status or About pageVerify Fix Applied:
Verify firmware version has been updated to a version newer than v9.1.0cu.2350_b20230313📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cgi-bin/cstecgi.cgi with setWiFiWpsCfg parameters
- Multiple failed authentication attempts followed by successful login
Network Indicators:
- Unexpected outbound connections from router
- Unusual traffic patterns from router management interface
SIEM Query:
source_ip=router_ip AND (uri_path="/cgi-bin/cstecgi.cgi" AND http_method=POST AND uri_query CONTAINS "setWiFiWpsCfg")