CVE-2024-7443
📋 TL;DR
This critical vulnerability in Vivotek IB8367A VVTK-0100b allows remote attackers to execute arbitrary commands via command injection in the upload_file.cgi component. Attackers can manipulate the QUERY_STRING parameter to inject system commands. Only end-of-life products are affected, as the vendor no longer supports this release tree.
💻 Affected Systems
- Vivotek IB8367A VVTK-0100b
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands, install malware, pivot to other systems, or create persistent backdoors.
Likely Case
Remote code execution leading to device takeover, data exfiltration, or use as a foothold for lateral movement within the network.
If Mitigated
Limited impact if proper network segmentation and access controls prevent exploitation attempts.
🎯 Exploit Status
Public proof-of-concept exists, and command injection vulnerabilities are frequently weaponized. Remote exploitation without authentication makes this particularly dangerous.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
No official patch available since this affects end-of-life products. Vendor confirmed affected release tree is no longer supported.
🔧 Temporary Workarounds
Network Access Control
linuxBlock external access to the vulnerable device and restrict internal access to authorized networks only.
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable CGI Component
linuxRemove or disable the vulnerable upload_file.cgi component if possible.
mv /path/to/upload_file.cgi /path/to/upload_file.cgi.disabled
🧯 If You Can't Patch
- Immediately isolate affected devices from internet access and place them in a restricted network segment
- Replace affected devices with supported models that receive security updates
🔍 How to Verify
Check if Vulnerable:
Check if device model is Vivotek IB8367A VVTK-0100b and if upload_file.cgi is accessible via web interfaceCheck Version:
Check device web interface or serial console for model informationVerify Fix Applied:
Verify device is no longer accessible from untrusted networks and upload_file.cgi endpoint is disabled📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed access attempts to upload_file.cgi
- Suspicious process creation from web server
Network Indicators:
- HTTP requests to upload_file.cgi with unusual parameters
- Outbound connections from device to unexpected destinations
- Command and control traffic patterns
SIEM Query:
source="web_server" AND uri="*upload_file.cgi*" AND (query_string="*;*" OR query_string="*|*" OR query_string="*`*" OR query_string="*$(*")