CVE-2024-37626
📋 TL;DR
This CVE describes a command injection vulnerability in TOTOLINK A6000R routers that allows remote attackers to execute arbitrary code via the iface parameter. Attackers can potentially take full control of affected devices. This affects users of TOTOLINK A6000R routers with vulnerable firmware.
💻 Affected Systems
- TOTOLINK A6000R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to install persistent backdoors, pivot to internal networks, intercept traffic, or use device as botnet node.
Likely Case
Remote code execution leading to device takeover, credential theft, and network surveillance.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept exploit code. Command injection vulnerabilities are typically easy to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.totolink.net/
Restart Required: Yes
Instructions:
1. Check vendor 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
Network Isolation
allPlace router behind firewall with restricted WAN access and disable unnecessary services.
Access Control
linuxRestrict administrative access to trusted IP addresses only.
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Isolate device in separate VLAN with strict firewall rules
- Monitor for suspicious outbound connections and command execution attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Status or Firmware Upgrade section.Check Version:
Login to router admin interface and check System Information page.Verify Fix Applied:
Verify firmware version has been updated to a version later than V1.0.1-B20201211.2000.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed login attempts followed by successful access
- Suspicious iface parameter values in web logs
Network Indicators:
- Unexpected outbound connections from router
- Traffic to known malicious IPs
- Unusual port scanning from router IP
SIEM Query:
source="router_logs" AND ("vif_enable" OR "iface=" AND ("|" OR ";" OR "$" OR "`"))