CVE-2024-58282
📋 TL;DR
Serendipity 2.5.0 contains a remote code execution vulnerability where authenticated administrators can upload malicious PHP files through the media upload functionality. This allows attackers to execute arbitrary system commands on the web server, potentially compromising the entire hosting environment.
💻 Affected Systems
- Serendipity
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise leading to data theft, lateral movement to other systems, installation of persistent backdoors, and complete loss of confidentiality, integrity, and availability.
Likely Case
Web server compromise allowing data exfiltration, defacement, cryptocurrency mining, or use as part of a botnet.
If Mitigated
Limited impact if proper file upload restrictions and web application firewalls are in place, though authenticated users could still cause damage.
🎯 Exploit Status
Exploit requires administrator credentials. Public exploit code is available on Exploit-DB (ID 52036).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.5.1 or later
Vendor Advisory: https://www.s9y.org/latest
Restart Required: No
Instructions:
1. Backup your Serendipity installation and database. 2. Download the latest version from https://github.com/s9y/Serendipity/releases. 3. Replace all files with the new version. 4. Verify the installation works correctly.
🔧 Temporary Workarounds
Restrict PHP file uploads
allConfigure web server to block PHP file uploads through media upload functionality
# Add to .htaccess for Apache:
<FilesMatch "\.php$">
Deny from all
</FilesMatch>
# For Nginx:
location ~ \.php$ {
deny all;
}
Implement file type validation
allAdd server-side validation to reject PHP file uploads
🧯 If You Can't Patch
- Immediately change all administrator passwords and enable multi-factor authentication
- Implement strict file upload restrictions at the web server level to block PHP file execution
🔍 How to Verify
Check if Vulnerable:
Check Serendipity version in admin panel or by examining the serendipity_config_local.inc.php file for version information.Check Version:
grep -i 'version' serendipity_config_local.inc.phpVerify Fix Applied:
Verify version is 2.5.1 or later in admin panel. Test media upload functionality with PHP files to ensure they are rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with .php extensions
- Multiple failed login attempts followed by successful admin login
- Execution of system commands via web requests
Network Indicators:
- POST requests to upload.php with PHP file content
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND (uri_path="/serendipity_admin.php" OR uri_path="/serendipity_admin/media.php") AND (file_extension="php" OR method="POST")