CVE-2023-24154
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on TOTOLINK T8 routers via command injection in the slaveIpList parameter of the setUpgradeFW function. Attackers can gain full control of affected devices, potentially compromising network security. This affects TOTOLINK T8 routers running vulnerable firmware versions.
💻 Affected Systems
- TOTOLINK T8
📦 What is this software?
T8 Firmware by Totolink
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and participation in botnets.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and command injection protections are implemented.
🎯 Exploit Status
Exploitation requires access to the web interface. Public proof-of-concept demonstrates command injection via crafted HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check TOTOLINK website for firmware updates
2. Download latest firmware for T8 model
3. Access router web interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Network Segmentation
allIsolate TOTOLINK T8 routers from internet and restrict access to management interface
Access Control
linuxImplement strict firewall rules to limit access to router management interface
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
- Disable remote management and ensure router is not internet-facing
- Implement network monitoring for unusual outbound connections from router
🔍 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/ | grep -i firmwareVerify Fix Applied:
Verify firmware version is newer than V4.1.5cu and test if command injection is possible📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cgi-bin/cstecgi.cgi with shell metacharacters in parameters
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unusual outbound connections from router IP
- Traffic to known malicious IPs from router
SIEM Query:
source="router_logs" AND (uri="/cgi-bin/cstecgi.cgi" AND (param="slaveIpList" AND value="*;*" OR value="*|*" OR value="*`*"))