CVE-2020-27397
📋 TL;DR
CVE-2020-27397 is an authenticated file upload vulnerability in Marital - Online Matrimonial Project in PHP version 1.0 that allows attackers to upload malicious PHP files, leading to remote code execution on the web server. This affects any organization running this specific matrimonial software with authenticated user access. Attackers can gain full control of the hosting server through this vulnerability.
💻 Affected Systems
- Marital - Online Matrimonial Project in PHP
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the web server, data exfiltration, installation of persistent backdoors, lateral movement to other systems, and potential ransomware deployment.
Likely Case
Web server takeover, defacement of website, theft of sensitive user data (including personal and financial information), and use of server for further attacks.
If Mitigated
Limited impact with proper file upload restrictions, web application firewalls, and server hardening in place.
🎯 Exploit Status
Exploit code is publicly available on Packet Storm Security. Attack requires authenticated user credentials but is straightforward to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Remove or replace the vulnerable software entirely. 2. Implement proper file upload validation if continuing to use. 3. Consider migrating to a maintained matrimonial platform.
🔧 Temporary Workarounds
Implement File Upload Restrictions
allAdd server-side validation to restrict file uploads to specific extensions and implement content-type checking.
Modify PHP code to validate file extensions and MIME types before accepting uploads
Web Application Firewall Rules
allConfigure WAF to block PHP file uploads and suspicious POST requests to upload endpoints.
Add WAF rules to block .php file uploads and monitor for suspicious upload patterns
🧯 If You Can't Patch
- Disable file upload functionality completely in the application
- Implement strict network segmentation and isolate the vulnerable server from critical systems
🔍 How to Verify
Check if Vulnerable:
Check if running Marital - Online Matrimonial Project version 1.0. Review file upload functionality for lack of proper file type validation.Check Version:
Check application version in admin panel or review source code for version indicatorsVerify Fix Applied:
Test file upload functionality with PHP files - they should be rejected. Verify WAF rules are blocking PHP uploads.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with .php extension
- Multiple failed upload attempts followed by successful PHP file upload
- POST requests to upload endpoints with PHP content
Network Indicators:
- Unusual outbound connections from web server post-upload
- Traffic patterns indicating command and control activity
SIEM Query:
source="web_server" AND (uri_path="*upload*" AND file_extension=".php")