CVE-2024-11169
📋 TL;DR
An unhandled exception in the fs module of danny-avila/librechat allows unauthenticated attackers to crash the server by sending specially crafted file upload requests. This vulnerability affects all deployments running vulnerable versions of LibreChat. The server crash results in denial of service, disrupting chat functionality.
💻 Affected Systems
- danny-avila/librechat
📦 What is this software?
Librechat by Librechat
⚠️ Risk & Real-World Impact
Worst Case
Complete service outage through repeated exploitation, causing extended downtime and potential data loss for in-progress conversations.
Likely Case
Temporary service disruption requiring manual server restart, with potential loss of unsaved chat sessions.
If Mitigated
Minimal impact with proper monitoring and automated recovery systems in place.
🎯 Exploit Status
Exploitation requires sending specially crafted requests to trigger the fs module exception. No authentication is required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.7.6
Vendor Advisory: https://github.com/danny-avila/librechat/commit/629be5c0ca2b332178524b4e3f6fac715aea8cc4
Restart Required: Yes
Instructions:
1. Update LibreChat to version 0.7.6 or later. 2. Run 'npm install' to update dependencies. 3. Restart the LibreChat service.
🔧 Temporary Workarounds
Disable file uploads
allTemporarily disable file upload functionality to prevent exploitation
Modify LibreChat configuration to disable file upload endpoints
Implement request filtering
allUse WAF or reverse proxy to filter malicious file upload requests
Configure WAF rules to block suspicious file upload patterns
🧯 If You Can't Patch
- Implement rate limiting on file upload endpoints
- Deploy behind a reverse proxy with request validation
🔍 How to Verify
Check if Vulnerable:
Check if LibreChat version is below 0.7.6 by examining package.json or running version check commandCheck Version:
npm list librechat | grep librechatVerify Fix Applied:
Confirm version is 0.7.6 or higher and test file upload functionality📡 Detection & Monitoring
Log Indicators:
- Server crash logs
- Unhandled exception errors from fs module
- Repeated failed file upload attempts
Network Indicators:
- Spike in file upload requests from single IP
- Malformed file upload payloads
SIEM Query:
source="librechat.log" AND ("unhandled exception" OR "fs module error" OR "server crash")