CVE-2023-42286
📋 TL;DR
This vulnerability allows attackers to include arbitrary PHP files in eyoucms v1.6.4 through template configuration manipulation, leading to remote code execution. Attackers can execute system commands or upload malicious payloads. All systems running the vulnerable version are affected.
💻 Affected Systems
- eyoucms
📦 What is this software?
Eyoucms by Eyoucms
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining root/admin access, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Website defacement, data theft, malware deployment, and use as pivot point for internal network attacks.
If Mitigated
Limited impact with proper network segmentation, WAF rules, and file integrity monitoring detecting exploitation attempts.
🎯 Exploit Status
Exploitation requires access to template configuration functionality; may require authentication bypass or other initial access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.6.5 or later
Vendor Advisory: https://github.com/eyoucms/eyoucms
Restart Required: No
Instructions:
1. Backup current installation and database. 2. Download latest version from official repository. 3. Replace vulnerable files with patched version. 4. Verify template configuration security controls are enabled.
🔧 Temporary Workarounds
Restrict template configuration access
linuxLimit access to template configuration functionality to trusted administrators only
chmod 640 template_config.php
chown root:www-data template_config.php
Implement file inclusion restrictions
allAdd input validation to prevent arbitrary file inclusion in template configuration
Add allowlist validation for template file paths in configuration handling code
🧯 If You Can't Patch
- Implement strict WAF rules blocking file inclusion patterns and PHP execution attempts
- Isolate the vulnerable system in a DMZ with strict outbound traffic filtering
🔍 How to Verify
Check if Vulnerable:
Check if running eyoucms v1.6.4 and review template configuration files for unrestricted file inclusionCheck Version:
grep -r 'version' config/install.lock or check admin panel version displayVerify Fix Applied:
Verify version is updated to v1.6.5+ and test template configuration with malicious payloads📡 Detection & Monitoring
Log Indicators:
- Unusual file inclusion attempts in web logs
- Template configuration modifications
- PHP execution errors with suspicious file paths
Network Indicators:
- HTTP requests with file inclusion parameters
- POST requests to template configuration endpoints
SIEM Query:
source="web_logs" AND ("include" OR "require") AND ("php" OR ".." OR "/etc/")