CVE-2024-57777
📋 TL;DR
A directory traversal vulnerability in Ianproxy v0.1 and earlier allows remote attackers to access sensitive files outside the intended directory. This affects all deployments running vulnerable versions of Ianproxy, potentially exposing configuration files, credentials, or other sensitive data.
💻 Affected Systems
- Ianproxy
📦 What is this software?
Lanproxy by Lanproxy Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through exposure of sensitive configuration files, credentials, or private keys leading to lateral movement or data exfiltration.
Likely Case
Unauthorized access to sensitive files containing configuration details, API keys, or credentials stored within the application directory or accessible parent directories.
If Mitigated
Limited exposure of non-critical files if proper access controls and directory restrictions are implemented.
🎯 Exploit Status
Directory traversal vulnerabilities are typically easy to exploit with simple HTTP requests containing path traversal sequences (../).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://github.com/ffay/lanproxy/issues/192
Restart Required: No
Instructions:
No official patch exists. Consider migrating to alternative software or implementing strict workarounds.
🔧 Temporary Workarounds
Implement Input Validation
allAdd server-side validation to reject any file path requests containing directory traversal sequences (../, ..\)
Configure web server or application firewall to block requests with ../ patterns
Restrict File Access
linuxConfigure the application to run with minimal privileges and restrict file system access to only necessary directories
chmod 750 /path/to/ianproxy
chown www-data:www-data /path/to/ianproxy
🧯 If You Can't Patch
- Isolate the vulnerable system in a restricted network segment with no internet access
- Implement strict network access controls and monitor all file access attempts
🔍 How to Verify
Check if Vulnerable:
Attempt to access a file outside the intended directory using ../ sequences in URL parameters or file requestsCheck Version:
Check the Ianproxy version in configuration files or via application interfaceVerify Fix Applied:
Test that directory traversal attempts return access denied errors instead of file contents📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing ../ patterns
- Unusual file access patterns outside normal directories
- Failed file access attempts with traversal sequences
Network Indicators:
- HTTP requests with encoded traversal sequences (%2e%2e%2f)
- Multiple sequential requests attempting different directory paths
SIEM Query:
source="web_logs" AND (url="*../*" OR url="*..\\*" OR url="*%2e%2e%2f*")