CVE-2024-39171
📋 TL;DR
This vulnerability in PHPVibe v11.0.46 allows attackers to bypass directory traversal protections through incomplete blacklist checks, enabling them to write malicious code to .htaccess files and execute arbitrary code via files with .png extensions. This affects all users running the vulnerable version of PHPVibe. The high CVSS score of 9.8 indicates critical severity.
💻 Affected Systems
- PHPVibe
📦 What is this software?
Phpvibe by Phpvibe
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise with remote code execution, data exfiltration, and complete system takeover.
Likely Case
Unauthenticated attackers achieving remote code execution to deploy malware, create backdoors, or deface websites.
If Mitigated
Limited impact with proper file permissions, web application firewalls, and restricted directory access preventing successful exploitation.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept exploit code demonstrating the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://phpvibe.com
Restart Required: No
Instructions:
1. Check for vendor updates at phpvibe.com
2. If patch available, download and apply
3. Verify .htaccess file integrity
4. Remove any suspicious .png files
🔧 Temporary Workarounds
Restrict .htaccess and .png file permissions
linuxSet strict file permissions to prevent unauthorized writes to .htaccess and .png files
chmod 644 .htaccess
find /path/to/phpvibe -name "*.png" -exec chmod 644 {} \;
chown root:www-data .htaccess
Implement WAF rules
allConfigure web application firewall to block directory traversal patterns and suspicious file writes
🧯 If You Can't Patch
- Disable PHPVibe or restrict access to admin interfaces
- Implement strict file integrity monitoring for .htaccess and .png files
🔍 How to Verify
Check if Vulnerable:
Check PHPVibe version in admin panel or configuration files. If version is exactly 11.0.46, system is vulnerable.Check Version:
grep -r "version" /path/to/phpvibe/config/ || check admin panelVerify Fix Applied:
Test directory traversal attempts using known payloads from GitHub repository. Verify .htaccess files haven't been modified.📡 Detection & Monitoring
Log Indicators:
- Unusual .htaccess modifications
- Unexpected .png file creation in non-image directories
- Directory traversal patterns in access logs
Network Indicators:
- HTTP requests containing ../ patterns
- POST requests writing to .htaccess or .png files
SIEM Query:
source="web_logs" AND (uri="*../*" OR uri="*.htaccess*" OR uri="*.png*")