CVE-2024-4306
📋 TL;DR
CVE-2024-4306 is a critical unrestricted file upload vulnerability in HubBank version 1.0.2 that allows authenticated users to upload malicious PHP files. This can lead to webshell execution and complete system compromise. All HubBank 1.0.2 installations with registered user accounts are affected.
💻 Affected Systems
- HubBank
📦 What is this software?
Hubbank by Ofofonobsdev
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise leading to data theft, ransomware deployment, lateral movement within the network, and complete system takeover.
Likely Case
Attackers upload webshells to gain persistent remote access, execute arbitrary commands, steal sensitive banking data, and pivot to other systems.
If Mitigated
With proper file upload restrictions and web application firewalls, exploitation attempts are blocked and logged for investigation.
🎯 Exploit Status
Exploitation requires registered user credentials but is technically simple once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-hubbank
Restart Required: No
Instructions:
1. Check vendor advisory for updates. 2. Monitor for patch release. 3. Apply patch when available following vendor instructions.
🔧 Temporary Workarounds
File Upload Restriction
allImplement server-side validation to block PHP file uploads and restrict allowed file types to safe extensions only.
# Configure web server to block .php uploads
# Example Apache: <FilesMatch "\.php$">
# Deny from all
# </FilesMatch>
Web Application Firewall Rules
allDeploy WAF rules to detect and block file upload attempts with PHP extensions or suspicious content.
# WAF rule to block .php uploads
# Example ModSecurity: SecRule FILES "@rx \.php$" "deny,status:403"
🧯 If You Can't Patch
- Disable file upload functionality completely in HubBank configuration
- Implement network segmentation to isolate HubBank server and restrict outbound connections
🔍 How to Verify
Check if Vulnerable:
Check HubBank version in admin panel or configuration files; version 1.0.2 is vulnerable.Check Version:
grep -r 'version' /path/to/hubbank/config/ || check admin dashboardVerify Fix Applied:
Test file upload functionality with PHP files; successful upload indicates vulnerability.📡 Detection & Monitoring
Log Indicators:
- File upload requests with .php extensions
- Unusual POST requests to upload endpoints
- Webshell access patterns in access logs
Network Indicators:
- Unexpected outbound connections from HubBank server
- Suspicious POST requests to /upload endpoints
SIEM Query:
source="web_logs" AND (uri_path="/upload" OR file_extension=".php") AND status=200