CVE-2024-57021
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary operating system commands on TOTOLINK X5000R routers by injecting malicious commands through the eHour parameter in the setWiFiScheduleCfg function. Attackers can gain full control of affected devices, potentially compromising network security. This affects all users running vulnerable firmware versions of the TOTOLINK X5000R router.
💻 Affected Systems
- TOTOLINK X5000R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing persistent backdoor installation, network traffic interception, lateral movement to connected devices, and use as a botnet node.
Likely Case
Router takeover enabling DNS hijacking, credential theft from network traffic, and deployment of malware to connected devices.
If Mitigated
Limited impact if network segmentation isolates the router and command injection attempts are blocked by WAF or input validation.
🎯 Exploit Status
Exploitation requires authentication to the router's web interface. The GitHub reference contains technical details and proof-of-concept information.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check TOTOLINK for latest firmware version
Vendor Advisory: https://www.totolink.net/
Restart Required: Yes
Instructions:
1. Log into TOTOLINK router web interface. 2. Navigate to System Tools > Firmware Upgrade. 3. Download latest firmware from TOTOLINK website. 4. Upload and install the firmware. 5. Reboot the router after installation.
🔧 Temporary Workarounds
Disable WiFi Schedule Feature
allRemove or disable the setWiFiScheduleCfg functionality if not needed
Network Segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Implement strict network access controls to limit access to router management interface
- Deploy web application firewall (WAF) with command injection protection rules
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status or System InformationCheck Version:
Login to router web interface and navigate to System Status pageVerify Fix Applied:
Verify firmware version has been updated to a version later than V9.1.0cu.2350_B20230313📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed authentication attempts followed by setWiFiScheduleCfg access
- Suspicious eHour parameter values in web logs
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Unexpected SSH or telnet sessions originating from router
SIEM Query:
source="router_logs" AND ("setWiFiScheduleCfg" OR "eHour" AND ("|" OR ";" OR "$" OR "`"))