CVE-2024-27489
📋 TL;DR
This vulnerability in WMCMS v4.4 allows attackers to delete arbitrary files on the server by sending a specially crafted POST request to the DelFile() function. This affects all systems running the vulnerable version of WMCMS, potentially leading to data loss, service disruption, or system compromise.
💻 Affected Systems
- WMCMS
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through deletion of critical system files, leading to permanent data loss, service unavailability, or privilege escalation.
Likely Case
Deletion of web application files, configuration files, or user data causing service disruption and data loss.
If Mitigated
Limited impact with proper file permissions and monitoring, potentially only affecting non-critical files.
🎯 Exploit Status
Public proof-of-concept code is available, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check for official patches from WMCMS developers. 2. If no patch available, implement workarounds. 3. Consider upgrading to a newer version if available.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation for file deletion operations to prevent path traversal and arbitrary file deletion.
Modify DelFile() function to validate file paths against allowed directories
Web Application Firewall Rules
allConfigure WAF to block POST requests containing suspicious file path patterns.
Add WAF rule: Block POST requests with '..' or absolute paths in parameters
🧯 If You Can't Patch
- Implement strict file system permissions to limit which files the web server user can delete
- Deploy network segmentation and restrict access to WMCMS administration interfaces
🔍 How to Verify
Check if Vulnerable:
Test by sending a crafted POST request to the DelFile endpoint with a controlled test file path and check if deletion occurs.Check Version:
Check WMCMS version in admin panel or configuration filesVerify Fix Applied:
Attempt the same exploit after applying fixes and verify file deletion no longer occurs.📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to DelFile endpoint
- File deletion events in system logs
- Error logs showing failed file deletion attempts
Network Indicators:
- POST requests with file path parameters
- Unusual file deletion patterns
SIEM Query:
source="web_logs" AND method="POST" AND uri="*DelFile*" AND (param="*..*" OR param="*/etc/*" OR param="*C:*")