CVE-2023-30269
📋 TL;DR
CLTPHP versions up to 6.0 contain an improper input validation vulnerability in the Template.php controller that allows attackers to execute arbitrary code. This affects all systems running vulnerable CLTPHP installations, particularly web applications using this content management system.
💻 Affected Systems
- CLTPHP
📦 What is this software?
Cltphp by Cltphp
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and lateral movement within the network.
Likely Case
Unauthenticated attackers gaining shell access to the web server, potentially leading to website defacement, data exfiltration, or malware deployment.
If Mitigated
Attack blocked at WAF level or system isolated, preventing exploitation but requiring patching.
🎯 Exploit Status
Public proof-of-concept available showing simple exploitation via crafted HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: > 6.0
Vendor Advisory: https://gist.github.com/HuBenLab/f5eb8ebbba20c835a3170d392c9e46a4
Restart Required: No
Instructions:
1. Upgrade CLTPHP to version above 6.0. 2. Replace vulnerable Template.php file with patched version. 3. Clear application cache.
🔧 Temporary Workarounds
WAF Rule Implementation
allDeploy web application firewall rules to block malicious requests targeting Template.php
File Access Restriction
linuxRestrict access to application/admin/controller/Template.php via .htaccess or web server configuration
# Apache: <Files "Template.php">
# Order Deny,Allow
# Deny from all
# </Files>
# Nginx: location ~ /application/admin/controller/Template\.php$ { deny all; }
🧯 If You Can't Patch
- Isolate affected systems from internet access
- Implement strict network segmentation and monitoring
🔍 How to Verify
Check if Vulnerable:
Check if CLTPHP version <= 6.0 is installed and if application/admin/controller/Template.php exists with vulnerable code patternsCheck Version:
Check CLTPHP configuration files or admin panel for version informationVerify Fix Applied:
Verify CLTPHP version > 6.0 and check that Template.php contains proper input validation📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Template.php endpoint
- File write operations in application directories
- PHP execution errors in web logs
Network Indicators:
- HTTP requests with suspicious parameters targeting /application/admin/controller/Template.php
- Outbound connections from web server to unknown IPs
SIEM Query:
source="web_logs" AND (uri="*Template.php*" AND (method="POST" OR params="*eval*" OR params="*system*"))