CVE-2025-50688
📋 TL;DR
This CVE describes a command injection vulnerability in TwistedWeb 14.0.0 that allows remote attackers to execute arbitrary commands on affected systems via specially crafted HTTP PUT requests. The vulnerability affects systems running TwistedWeb 14.0.0 with file upload functionality enabled, potentially leading to complete system compromise.
💻 Affected Systems
- TwistedWeb
📦 What is this software?
Twistedweb by Twistedmatrix
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining root/system-level access, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Web server process compromise leading to data theft, service disruption, and potential privilege escalation to higher system privileges.
If Mitigated
Limited impact with proper network segmentation, minimal web server privileges, and input validation controls in place.
🎯 Exploit Status
Exploitation requires crafting malicious HTTP PUT requests but does not require authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 14.0.1 or later
Vendor Advisory: https://twisted.org/documents/14.0.0/index.html
Restart Required: No
Instructions:
1. Upgrade TwistedWeb to version 14.0.1 or later. 2. Verify the upgrade completed successfully. 3. Test file upload functionality to ensure it works properly.
🔧 Temporary Workarounds
Disable HTTP PUT method
allBlock or disable HTTP PUT requests to prevent file upload exploitation.
# Configure web server to reject PUT requests
# Example for nginx: limit_except GET POST { deny all; }
Implement input validation
allAdd server-side validation for file uploads to reject malicious content.
# Implement file type validation and sanitization
# Example Python: validate file extension and content
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Run TwistedWeb with minimal privileges (non-root user)
🔍 How to Verify
Check if Vulnerable:
Check TwistedWeb version and verify if running 14.0.0 with file upload enabled.Check Version:
python -c "import twisted; print(twisted.__version__)"Verify Fix Applied:
Verify TwistedWeb version is 14.0.1 or later and test file upload functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP PUT requests with suspicious file names
- Multiple failed upload attempts
- Commands executed from web server process
Network Indicators:
- HTTP PUT requests to upload endpoints with unusual payloads
- Outbound connections from web server to unknown IPs
SIEM Query:
source="web_logs" method="PUT" (file_extension="*.sh" OR file_extension="*.py" OR file_extension="*.exe")