CVE-2024-6959
📋 TL;DR
This vulnerability in parisneo/lollms-webui version 9.8 allows attackers to cause a Denial of Service (DoS) by uploading specially crafted audio files with manipulated multipart boundaries. The lack of CSRF protection enables remote exploitation, making the web interface inaccessible. All users running the vulnerable version are affected.
💻 Affected Systems
- parisneo/lollms-webui
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption with extended downtime, resource exhaustion leading to system instability, and potential cascading failures in dependent services.
Likely Case
Temporary service unavailability requiring manual intervention to restart the webui service, with moderate resource consumption during the attack.
If Mitigated
Minimal impact with proper input validation and CSRF protection in place, potentially causing only brief processing delays.
🎯 Exploit Status
Exploitation is straightforward with publicly available details; CSRF vulnerability enables easy remote attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 9.9 or later
Vendor Advisory: https://huntr.com/bounties/6394d32e-f35c-418a-95b8-e7254ed0bc8e
Restart Required: Yes
Instructions:
1. Update lollms-webui to version 9.9 or later. 2. Restart the lollms-webui service. 3. Verify the update was successful.
🔧 Temporary Workarounds
Disable audio upload functionality
allTemporarily disable audio file uploads in lollms-webui configuration
Edit configuration to remove or disable audio upload endpoints
Implement CSRF protection
allAdd CSRF tokens to file upload forms and validate them server-side
Implement CSRF middleware and token validation in webui code
🧯 If You Can't Patch
- Implement strict input validation for multipart boundaries and file uploads
- Deploy WAF rules to block requests with abnormal boundary lengths or patterns
🔍 How to Verify
Check if Vulnerable:
Check if running lollms-webui version 9.8 by examining version information in the web interface or configuration files.Check Version:
Check webui interface or run: python -c "import lollms; print(lollms.__version__)" if availableVerify Fix Applied:
Verify version is 9.9 or later and test audio file upload functionality with boundary manipulation attempts.📡 Detection & Monitoring
Log Indicators:
- Multiple failed or abnormally long audio upload requests
- High CPU/memory usage from webui process
- Error logs mentioning multipart boundary parsing issues
Network Indicators:
- HTTP POST requests to upload endpoints with unusually large boundary parameters
- Repeated upload attempts from single sources
SIEM Query:
source="webui.log" AND ("audio upload" OR "multipart") AND ("error" OR "timeout" OR "boundary")