CVE-2025-44177
📋 TL;DR
An unauthenticated directory traversal vulnerability in White Star Software Protop version 4.4.2-2024-11-27 allows remote attackers to read arbitrary files on the operating system via specially crafted requests to the /pt3upd/ endpoint. This affects all systems running the vulnerable version of Protop software. Attackers can access sensitive files without authentication.
💻 Affected Systems
- White Star Software Protop
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through reading sensitive configuration files, passwords, SSH keys, or other credentials leading to lateral movement and data exfiltration.
Likely Case
Unauthorized access to sensitive files containing configuration data, logs, or application secrets that could enable further attacks.
If Mitigated
Limited impact if proper network segmentation, file permissions, and monitoring are in place to detect traversal attempts.
🎯 Exploit Status
The GitHub gist contains technical details and appears to demonstrate the vulnerability. The attack requires no authentication and uses simple directory traversal sequences.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://protop.com
Restart Required: No
Instructions:
1. Check vendor website for security updates. 2. Apply any available patches. 3. Verify the fix by testing the vulnerability.
🔧 Temporary Workarounds
Block /pt3upd/ endpoint
allRestrict access to the vulnerable endpoint using web server configuration or firewall rules.
# For Apache: RewriteRule ^/pt3upd/ - [F]
# For Nginx: location /pt3upd/ { deny all; }
# For firewall: iptables -A INPUT -p tcp --dport [PORT] -m string --string "/pt3upd/" --algo bm -j DROP
Implement WAF rules
allConfigure web application firewall to block directory traversal patterns.
# Example ModSecurity rule: SecRule REQUEST_URI "@rx \.\.(/|%2f)" "id:1001,phase:1,deny"
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Protop instances from sensitive systems.
- Apply strict file system permissions to limit what files the Protop process can access.
🔍 How to Verify
Check if Vulnerable:
Test by sending a request to http://[target]:[port]/pt3upd/../../../etc/passwd (or equivalent Windows path) and checking if sensitive file contents are returned.Check Version:
Check Protop version in web interface or configuration files, or run: grep -i version /path/to/protop/config/filesVerify Fix Applied:
Retest the directory traversal attempt after applying mitigations to confirm access is blocked.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /pt3upd/ containing ../ or encoded equivalents
- Unusual file access patterns from Protop process
- Failed file access attempts with traversal sequences
Network Indicators:
- HTTP requests with directory traversal sequences in URL parameters or paths
- Unusual outbound data transfers following traversal attempts
SIEM Query:
source="web_logs" AND url="/pt3upd/*" AND (url="*../*" OR url="*%2e%2e%2f*")