CVE-2024-8940
📋 TL;DR
CVE-2024-8940 is a critical unrestricted file upload vulnerability in Scriptcase version 9.4.019 that allows attackers to upload malicious files to the server without proper validation. This affects organizations using the vulnerable Scriptcase application version, potentially leading to complete system compromise.
💻 Affected Systems
- Scriptcase
📦 What is this software?
Scriptcase by Scriptcase
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise leading to remote code execution, data theft, and complete system takeover.
Likely Case
Webshell deployment allowing persistent access, data exfiltration, and lateral movement within the network.
If Mitigated
Limited impact with proper file validation and restricted upload directories preventing malicious file execution.
🎯 Exploit Status
Simple HTTP POST request to vulnerable endpoint with malicious file payload.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest Scriptcase version beyond 9.4.019
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-scriptcase
Restart Required: Yes
Instructions:
1. Backup current Scriptcase installation. 2. Download latest version from official vendor. 3. Replace vulnerable files. 4. Restart web server. 5. Verify fix by testing upload functionality.
🔧 Temporary Workarounds
Block vulnerable endpoint
allRestrict access to the vulnerable jQuery File Upload endpoint
# Apache: RewriteRule ^/scriptcase/devel/lib/third/jquery_plugin/jQuery-File-Upload/server/php/ - [F]
# Nginx: location ~ ^/scriptcase/devel/lib/third/jquery_plugin/jQuery-File-Upload/server/php/ { deny all; }
Implement file upload restrictions
allConfigure web server to restrict file uploads to specific extensions
# Apache: <Location "/scriptcase/devel/lib/third/jquery_plugin/jQuery-File-Upload/server/php/"> SetEnvIf Request_URI ".*\.(php|phtml|php3|php4|php5|php7|phps|phar|inc|pl|py|jsp|asp|aspx|sh|bash|cmd|bat|exe|dll)$" block_upload </Location>
🧯 If You Can't Patch
- Implement strict WAF rules to block malicious file upload patterns
- Monitor and alert on file uploads to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Check Scriptcase version in admin panel or verify existence of vulnerable endpoint at /scriptcase/devel/lib/third/jquery_plugin/jQuery-File-Upload/server/php/Check Version:
Check Scriptcase version in application interface or configuration filesVerify Fix Applied:
Test file upload functionality with malicious extensions and verify they are rejected📡 Detection & Monitoring
Log Indicators:
- POST requests to /scriptcase/devel/lib/third/jquery_plugin/jQuery-File-Upload/server/php/
- File uploads with suspicious extensions (.php, .jsp, .exe)
Network Indicators:
- HTTP POST traffic to vulnerable endpoint with file uploads
- Unusual file upload patterns to Scriptcase
SIEM Query:
source="web_server" AND (uri="/scriptcase/devel/lib/third/jquery_plugin/jQuery-File-Upload/server/php/" OR file_extension IN ("php", "jsp", "exe", "sh"))