CVE-2022-28443
📋 TL;DR
UCMS v1.6 contains an arbitrary file deletion vulnerability that allows attackers to delete files on the server without proper authentication. This affects all UCMS v1.6 installations, potentially leading to complete system compromise through deletion of critical files.
💻 Affected Systems
- UCMS
📦 What is this software?
Ucms by Ucms Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through deletion of critical system files, configuration files, or web application files, leading to denial of service or privilege escalation.
Likely Case
Website defacement, data loss, or service disruption through deletion of web application files, databases, or configuration files.
If Mitigated
Limited impact if proper file permissions, web application firewalls, and access controls are in place to restrict file deletion operations.
🎯 Exploit Status
Exploitation appears straightforward based on available information. The vulnerability allows file deletion without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
File Permission Restriction
linuxSet strict file permissions to prevent web user from deleting critical files
chmod 644 /path/to/critical/files/*
chown root:root /path/to/critical/files/*
Web Application Firewall Rules
allBlock file deletion requests at the WAF level
Add rule to block requests containing file deletion patterns
🧯 If You Can't Patch
- Implement strict file system permissions to limit web application user's write/delete capabilities
- Deploy web application firewall with rules to detect and block file deletion attempts
🔍 How to Verify
Check if Vulnerable:
Check if running UCMS v1.6. Review application logs for file deletion attempts.Check Version:
Check UCMS version in admin panel or configuration filesVerify Fix Applied:
Test file deletion functionality with unauthorized requests to ensure proper access controls are in place.📡 Detection & Monitoring
Log Indicators:
- File deletion operations in web server logs
- Unauthorized access attempts to file management endpoints
Network Indicators:
- HTTP requests to file deletion endpoints without proper authentication
SIEM Query:
source="web_server" AND (uri="*delete*" OR uri="*remove*") AND NOT user="authenticated_user"