CVE-2024-58283
📋 TL;DR
This vulnerability allows authenticated attackers to upload malicious PHP files through the Elfinder file manager in WBCE CMS version 1.6.2, leading to remote code execution. Attackers can upload web shells and execute arbitrary system commands, potentially compromising the entire server. All organizations running WBCE CMS 1.6.2 with default configurations are affected.
💻 Affected Systems
- WBCE CMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server takeover, data exfiltration, lateral movement to other systems, and persistent backdoor installation.
Likely Case
Website defacement, data theft, cryptocurrency mining, or ransomware deployment.
If Mitigated
Limited impact if proper file upload restrictions and authentication controls are in place.
🎯 Exploit Status
Exploit requires authenticated access. Public exploit code is available on Exploit-DB.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.3 or later
Vendor Advisory: https://wbce-cms.org/
Restart Required: No
Instructions:
1. Backup your current installation. 2. Download the latest version from the official WBCE CMS website. 3. Replace the affected files, particularly those in the Elfinder component. 4. Verify the update by checking the version in the admin panel.
🔧 Temporary Workarounds
Disable Elfinder file upload
allTemporarily disable or restrict the Elfinder file manager upload functionality.
Modify the Elfinder configuration to disable PHP file uploads or restrict uploads to trusted users only.
Restrict file upload extensions
linuxConfigure the web server to block execution of uploaded PHP files.
Add to .htaccess: <FilesMatch "\.php$"> Deny from all </FilesMatch>
🧯 If You Can't Patch
- Implement strict access controls and multi-factor authentication for admin accounts.
- Deploy a web application firewall (WAF) with rules to block malicious file uploads.
🔍 How to Verify
Check if Vulnerable:
Check if running WBCE CMS version 1.6.2 by logging into the admin panel and viewing the version info.Check Version:
Check the CMS admin dashboard or view the version file in the installation directory.Verify Fix Applied:
Verify the version is updated to 1.6.3 or later in the admin panel and test file upload functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to Elfinder directories, especially PHP files from authenticated users.
- Suspicious POST requests to elfinder connector endpoints.
Network Indicators:
- Unexpected outbound connections from the web server to external IPs.
- Traffic patterns indicative of command and control (C2) communication.
SIEM Query:
source="web_server_logs" AND (uri="/elfinder/connector" OR file_extension=".php") AND user_agent NOT IN ("normal_user_agents")