CVE-2024-40425
📋 TL;DR
This CVE describes a critical file upload vulnerability in Sparkshop (Spark Mall B2C Mall) that allows remote attackers to upload malicious files and execute arbitrary code on affected systems. The vulnerability exists in the controller/common.php component and affects version 1.1.6 and earlier. Attackers can potentially gain complete control over vulnerable servers.
💻 Affected Systems
- Sparkshop (Spark Mall B2C Mall)
📦 What is this software?
Sparkshop by Sparkshop
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, ransomware deployment, lateral movement within the network, and persistent backdoor installation.
Likely Case
Webshell upload leading to server control, data exfiltration, and potential use as a pivot point for further attacks.
If Mitigated
File upload attempts blocked or sanitized, preventing code execution but potentially allowing DoS through resource exhaustion.
🎯 Exploit Status
Public proof-of-concept available on GitHub gist. Exploitation requires minimal technical skill due to simple file upload mechanism.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Check vendor website for updates or consider alternative solutions.
🔧 Temporary Workarounds
File Upload Restriction
allImplement strict file upload validation in web server configuration or application layer
# Example Apache .htaccess restriction
<FilesMatch "\.(php|phtml|php3|php4|php5|php7|phps|php8|inc|pl|py|jsp|asp|aspx|sh|cgi|exe)$">
Order Allow,Deny
Deny from all
</FilesMatch>
# Example Nginx location block
location ~* \.(php|phtml|php3|php4|php5|php7|phps|php8|inc|pl|py|jsp|asp|aspx|sh|cgi|exe)$ {
deny all;
}
WAF Rule Implementation
allDeploy web application firewall rules to block malicious file uploads
# Example ModSecurity rule
SecRule FILES_TMPNAMES "@rx \.(php|phtml|php3|php4|php5|php7|phps|php8|inc|pl|py|jsp|asp|aspx|sh|cgi|exe)$" \
"id:1001,phase:2,deny,status:403,msg:'Malicious file upload attempt'"
# Example Cloudflare WAF rule: Block file uploads with dangerous extensions
🧯 If You Can't Patch
- Immediately disable file upload functionality in the affected component
- Implement network segmentation to isolate vulnerable systems from critical assets
🔍 How to Verify
Check if Vulnerable:
Check if running Sparkshop version 1.1.6 or earlier. Attempt to upload a file with PHP extension via the vulnerable endpoint.Check Version:
# Check version in application files or database
# Look for version information in:
# - config files
# - admin panel
# - database settings table
# - composer.json or package.jsonVerify Fix Applied:
Verify file upload restrictions are working by attempting to upload malicious files and confirming they are blocked.📡 Detection & Monitoring
Log Indicators:
- Multiple file upload attempts with PHP/executable extensions
- Unusual POST requests to controller/common.php
- Files with suspicious names appearing in upload directories
Network Indicators:
- HTTP POST requests to /controller/common.php with file uploads
- Unusual outbound connections from web server after file upload
SIEM Query:
source="web_server" AND (uri="/controller/common.php" OR uri="*common.php*") AND method="POST" AND (user_agent="*curl*" OR user_agent="*wget*" OR user_agent="*python*" OR user_agent="*nmap*" OR user_agent="*nikto*")