CVE-2024-8575
📋 TL;DR
This critical buffer overflow vulnerability in TOTOLINK AC1200 T8 routers allows remote attackers to execute arbitrary code by sending specially crafted requests to the setWiFiScheduleCfg function. Attackers can potentially take full control of affected devices without authentication. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- TOTOLINK AC1200 T8
📦 What is this software?
T8 Firmware by Totolink
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, creation of persistent backdoors, lateral movement to internal networks, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify device settings, intercept network 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, though internal exploitation risk remains.
🎯 Exploit Status
Exploit details are publicly available on GitHub, making weaponization straightforward. The vulnerability requires no authentication and has a simple exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch is available. The vendor has not responded to disclosure. Monitor the vendor website for firmware updates at https://www.totolink.net/.
🔧 Temporary Workarounds
Disable remote management
allDisable web management interface access from WAN/Internet to prevent remote exploitation
Network segmentation
allPlace affected routers in isolated network segments with strict firewall rules
🧯 If You Can't Patch
- Replace affected devices with patched alternatives from different vendors
- Implement strict network access controls to limit exposure to only trusted internal networks
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface at System Status > Firmware Version. If version is 4.1.5cu.861_B20230220, device is vulnerable.Check Version:
Check via web interface or SSH if enabled: cat /proc/version or check web admin panelVerify Fix Applied:
Verify firmware version has been updated to a version newer than 4.1.5cu.861_B20230220. No official patched version is currently available.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to /cgi-bin/cstecgi.cgi with setWiFiScheduleCfg function
- Large payloads in requests to the management interface
- Multiple failed exploitation attempts
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- Traffic spikes to/from router management interface
- HTTP requests with buffer overflow patterns
SIEM Query:
source="router_logs" AND (uri="/cgi-bin/cstecgi.cgi" AND (method="POST" AND data CONTAINS "setWiFiScheduleCfg"))