CVE-2014-8516
📋 TL;DR
CVE-2014-8516 is an unrestricted file upload vulnerability in Visual Mining NetCharts Server that allows remote attackers to upload files with executable extensions and then execute arbitrary code. This affects all organizations running vulnerable versions of NetCharts Server, potentially leading to complete system compromise.
💻 Affected Systems
- Visual Mining NetCharts Server
📦 What is this software?
Netcharts Server by Cloudfastpath
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, ransomware deployment, or creation of persistent backdoors.
Likely Case
Webshell deployment allowing unauthorized access, data exfiltration, and lateral movement within the network.
If Mitigated
File uploads blocked or sanitized, preventing code execution while maintaining chart functionality.
🎯 Exploit Status
Exploit code available on Packet Storm Security and other sources. Simple file upload with executable extension.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown specific version - check vendor advisory
Vendor Advisory: Not provided in references (Visual Mining advisory needed)
Restart Required: Yes
Instructions:
1. Contact Visual Mining for patch information 2. Apply latest NetCharts Server update 3. Restart NetCharts Server service 4. Verify file upload restrictions are enforced
🔧 Temporary Workarounds
File Upload Restriction
allConfigure web server to block uploads of executable file types (.exe, .jsp, .php, .asp, etc.)
# Apache: Add to .htaccess or httpd.conf
<FilesMatch "\.(exe|php|asp|jsp|aspx|pl|cgi|sh|bat|cmd)$">
Order Allow,Deny
Deny from all
</FilesMatch>
# Nginx: Add to server block
location ~* \.(exe|php|asp|jsp|aspx|pl|cgi|sh|bat|cmd)$ {
deny all;
}
Network Segmentation
allRestrict access to NetCharts Server to trusted IP addresses only
# Firewall rule example (Linux iptables)
iptables -A INPUT -p tcp --dport [NetCharts_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [NetCharts_PORT] -j DROP
🧯 If You Can't Patch
- Disable file upload functionality entirely in NetCharts Server configuration
- Place NetCharts Server behind a WAF configured to block file upload attacks
🔍 How to Verify
Check if Vulnerable:
Attempt to upload a test file with executable extension (e.g., test.jsp, test.php) to NetCharts Server upload endpoint. If accepted without validation, system is vulnerable.Check Version:
Check NetCharts Server administration interface or configuration files for version informationVerify Fix Applied:
Attempt same upload test - should be rejected with error message. Check that only allowed file types (images, documents) can be uploaded.📡 Detection & Monitoring
Log Indicators:
- File upload requests with executable extensions
- HTTP POST requests to upload endpoints with unusual file types
- Successful uploads of non-image/document files
Network Indicators:
- POST requests to /upload or similar endpoints with executable file extensions in Content-Type or filename
- Subsequent requests to uploaded executable files
SIEM Query:
source="netcharts.log" AND (method="POST" AND uri="*upload*" AND (filename="*.exe" OR filename="*.php" OR filename="*.jsp" OR filename="*.asp"))🔗 References
- http://www.securityfocus.com/bid/70895
- http://www.zerodayinitiative.com/advisories/ZDI-14-372/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/98475
- https://packetstormsecurity.com/files/129023
- http://www.securityfocus.com/bid/70895
- http://www.zerodayinitiative.com/advisories/ZDI-14-372/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/98475
- https://packetstormsecurity.com/files/129023
