CVE-2024-6047
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary system commands on affected GeoVision devices due to improper input filtering. It affects end-of-life (EOL) GeoVision products, primarily used in surveillance and security systems. Attackers can fully compromise vulnerable devices without any authentication.
💻 Affected Systems
- GeoVision end-of-life devices
📦 What is this software?
Gvlx 4 Firmware by Geovision
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to botnet recruitment, data exfiltration, lateral movement into internal networks, and persistent backdoor installation.
Likely Case
Device compromise for Mirai-like botnet recruitment, DDoS participation, and credential theft from connected systems.
If Mitigated
Limited impact if devices are isolated behind firewalls with strict network controls and no internet exposure.
🎯 Exploit Status
Actively exploited in the wild for Mirai botnet recruitment. No authentication required makes exploitation trivial.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
No official patch available as devices are end-of-life. Consider workarounds or replacement.
🔧 Temporary Workarounds
Network Isolation
linuxIsolate affected devices from internet and restrict network access
iptables -A INPUT -s 0.0.0.0/0 -j DROP # Block all external access
iptables -A OUTPUT -d 0.0.0.0/0 -j DROP # Block all outgoing traffic
Access Control Lists
linuxImplement strict firewall rules to limit device communication
# Configure firewall to only allow necessary IPs/ports
iptables -A INPUT -s trusted_ip -p tcp --dport device_port -j ACCEPT
🧯 If You Can't Patch
- Immediately disconnect from internet and place behind strict firewall
- Replace with supported devices that receive security updates
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version against known EOL GeoVision products. Monitor for unexpected network connections or processes.Check Version:
Check device web interface or console for firmware version informationVerify Fix Applied:
Verify devices are no longer internet-accessible and network traffic is restricted to authorized sources only.📡 Detection & Monitoring
Log Indicators:
- Unexpected process execution
- Unauthorized configuration changes
- Failed authentication attempts from unknown sources
Network Indicators:
- Outbound connections to known C2 servers
- Unusual port scanning from device
- DDoS traffic originating from device
SIEM Query:
source_ip=geo_vision_device AND (destination_port=23 OR destination_port=2323 OR protocol="telnet")🔗 References
- https://www.twcert.org.tw/en/cp-139-7884-c5a8b-2.html
- https://www.twcert.org.tw/tw/cp-132-7883-f5635-1.html
- https://www.twcert.org.tw/en/cp-139-7884-c5a8b-2.html
- https://www.twcert.org.tw/tw/cp-132-7883-f5635-1.html
- https://www.akamai.com/blog/security-research/active-exploitation-mirai-geovision-iot-botnet
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-6047
