CVE-2024-41258
📋 TL;DR
This vulnerability in filestash v0.4 disables SSH host key verification, allowing man-in-the-middle attackers to intercept and potentially steal sensitive data transmitted via SSH connections. Anyone using the vulnerable version of filestash with SSH functionality is affected.
💻 Affected Systems
- filestash
📦 What is this software?
Filestash by Filestash
⚠️ Risk & Real-World Impact
Worst Case
Attackers intercept SSH connections, steal credentials, access sensitive files, and potentially compromise the entire filestash server and connected systems.
Likely Case
Attackers intercept SSH traffic to steal authentication credentials and sensitive file contents during transfers.
If Mitigated
With proper network segmentation and monitoring, impact is limited to potential credential exposure without lateral movement.
🎯 Exploit Status
Exploitation requires man-in-the-middle position between filestash and SSH server. Public proof-of-concept exists in the GitHub gist reference.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
Disable SSH functionality
allRemove or disable SSH connections in filestash configuration
Edit configuration to remove SSH backend options
Use alternative secure protocols
allReplace SSH connections with HTTPS or other secure protocols
Configure filestash to use HTTPS/SFTP with proper certificate validation
🧯 If You Can't Patch
- Segment network to prevent man-in-the-middle attacks between filestash and SSH servers
- Implement certificate pinning or strict host key verification through custom code modifications
🔍 How to Verify
Check if Vulnerable:
Check if using filestash v0.4 with SSH functionality enabled. Review source code for ssh.InsecureIgnoreHostKey() usage.Check Version:
Check filestash version in web interface or configuration filesVerify Fix Applied:
Verify SSH connections fail when host key changes, or that SSH functionality is disabled.📡 Detection & Monitoring
Log Indicators:
- Unexpected SSH connection failures
- Multiple SSH connection attempts from same source
Network Indicators:
- Unusual SSH traffic patterns
- SSH connections to unexpected destinations
SIEM Query:
source="filestash" AND (event="ssh_connection" OR event="authentication_failure")