CVE-2024-0739
📋 TL;DR
This critical vulnerability in Hecheng Leadshop allows remote attackers to execute arbitrary code through deserialization of untrusted data in the /web/leadshop.php file. Attackers can exploit this by manipulating the 'install' parameter to achieve remote code execution. All users running Hecheng Leadshop versions up to 1.4.20 are affected.
💻 Affected Systems
- Hecheng Leadshop
📦 What is this software?
Leadshop by Leadshop
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution leading to data theft, ransomware deployment, or creation of persistent backdoors.
Likely Case
Remote code execution allowing attackers to install malware, exfiltrate sensitive data, or pivot to other systems.
If Mitigated
Attack blocked at network perimeter or application firewall; no impact if proper input validation and deserialization controls are implemented.
🎯 Exploit Status
Exploit details have been publicly disclosed; attack requires minimal technical skill to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Monitor vendor for official patch. 2. If no patch available, implement workarounds immediately. 3. Consider migrating to alternative software if vendor is unresponsive.
🔧 Temporary Workarounds
Block access to vulnerable endpoint
allRestrict access to /web/leadshop.php file via web server configuration or firewall rules
# Apache: RewriteRule ^/web/leadshop\.php$ - [F,L]
# Nginx: location ~ /web/leadshop\.php$ { deny all; }
Input validation filter
allAdd input validation to reject malicious deserialization attempts
# In PHP: if (isset($_GET['install']) && !isValidInstallParam($_GET['install'])) { die('Invalid parameter'); }
🧯 If You Can't Patch
- Implement strict network segmentation and isolate affected systems
- Deploy web application firewall with deserialization attack detection rules
🔍 How to Verify
Check if Vulnerable:
Check if /web/leadshop.php exists and is accessible; verify version is ≤1.4.20Check Version:
# Check Leadshop version in configuration files or admin panelVerify Fix Applied:
Test if /web/leadshop.php endpoint is blocked or returns error; verify version >1.4.20 if patch becomes available📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests to /web/leadshop.php with install parameter
- PHP deserialization errors in application logs
- Unexpected process execution from web server
Network Indicators:
- HTTP requests containing serialized PHP objects in parameters
- Traffic patterns indicating reverse shell connections
SIEM Query:
source="web_logs" AND (uri="/web/leadshop.php" OR parameter="install")