CVE-2024-8162
📋 TL;DR
This critical vulnerability in TOTOLINK T10 AC1200 routers involves hard-coded credentials in the Telnet service configuration file, allowing remote attackers to gain unauthorized access. Attackers can exploit this to take full control of affected devices. All users of the specified router model and firmware version are affected.
💻 Affected Systems
- TOTOLINK T10 AC1200
📦 What is this software?
T10 Firmware by Totolink
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router with ability to intercept/modify all network traffic, install persistent malware, pivot to internal network, and disable security controls.
Likely Case
Unauthorized administrative access to router leading to network surveillance, DNS hijacking, credential theft, and service disruption.
If Mitigated
Limited impact if Telnet service is disabled and device is not internet-facing, though risk remains if internal access is possible.
🎯 Exploit Status
Exploit code is publicly available on GitHub. Attack requires only knowledge of hard-coded credentials and Telnet access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.totolink.net/
Restart Required: No
Instructions:
No official patch available. Vendor has not responded to disclosure. Consider replacing affected devices or implementing workarounds.
🔧 Temporary Workarounds
Disable Telnet Service
linuxCompletely disable Telnet service on the router to prevent exploitation
telnet service disable
service telnet stop
systemctl disable telnet
Block Telnet Port
linuxBlock Telnet port (23) at network perimeter
iptables -A INPUT -p tcp --dport 23 -j DROP
firewall-cmd --permanent --add-port=23/tcp --zone=public --remove-service=telnet
🧯 If You Can't Patch
- Isolate affected routers in separate VLAN with strict access controls
- Implement network monitoring for Telnet authentication attempts and block suspicious IPs
🔍 How to Verify
Check if Vulnerable:
Check if Telnet service is running on port 23 and attempt authentication with known hard-coded credentials from exploit disclosureCheck Version:
Check router web interface or use command: cat /proc/version | grep T10Verify Fix Applied:
Verify Telnet service is disabled and port 23 is closed. Test that authentication with hard-coded credentials fails📡 Detection & Monitoring
Log Indicators:
- Successful Telnet authentication from unexpected sources
- Multiple failed Telnet attempts followed by success
- Configuration changes via Telnet session
Network Indicators:
- Telnet connections to router on port 23
- Unusual outbound traffic from router after Telnet access
SIEM Query:
source="router_logs" AND (event="telnet_login" OR port=23) AND result="success"