CVE-2024-57212
📋 TL;DR
This CVE describes a command injection vulnerability in TOTOLINK A6000R routers that allows attackers to execute arbitrary commands via the opmode parameter in the action_reboot function. Attackers with network access to the router's web interface can potentially gain remote code execution. This affects users of TOTOLINK A6000R routers running vulnerable firmware.
💻 Affected Systems
- TOTOLINK A6000R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full router compromise allowing attacker to intercept all network traffic, install persistent backdoors, pivot to internal networks, and brick the device.
Likely Case
Router compromise leading to network traffic interception, DNS hijacking, credential theft, and potential lateral movement to connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access and strong authentication requirements.
🎯 Exploit Status
Exploitation requires access to the web interface. The vulnerability is in a specific function that may require authentication.
🛠️ 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 for A6000R
3. Access router web interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Reboot router after update
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Restrict Web Interface Access
linuxConfigure firewall rules to limit access to router management interface
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict access controls
- Implement network monitoring for suspicious traffic to/from router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at System Status > Firmware VersionCheck Version:
curl -s http://router-ip/cgi-bin/cstecgi.cgi | grep firmwareVerify Fix Applied:
Verify firmware version is newer than V1.0.1-B20201211.2000📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to action_reboot endpoint
- Multiple reboot events in short timeframe
- Suspicious commands in system logs
Network Indicators:
- Unusual outbound connections from router
- Traffic to unexpected destinations
- Port scanning originating from router
SIEM Query:
source="router.log" AND ("action_reboot" OR "opmode=") AND status=200