CVE-2022-1000
📋 TL;DR
This path traversal vulnerability in tinyfilemanager allows attackers to access files outside the intended directory by manipulating file paths. It affects all users running tinyfilemanager versions prior to 2.4.7. Attackers can potentially read sensitive system files or upload malicious files to restricted locations.
💻 Affected Systems
- tinyfilemanager
📦 What is this software?
Tiny File Manager by Prasathmani
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through reading sensitive configuration files, password files, or uploading webshells leading to remote code execution.
Likely Case
Unauthorized file access leading to information disclosure of sensitive data, configuration files, or source code.
If Mitigated
Limited impact if proper file permissions and web server configurations restrict access to sensitive directories.
🎯 Exploit Status
Exploitation requires minimal technical skill. Public proof-of-concept exists in the referenced bounty report.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.7
Vendor Advisory: https://github.com/prasathmani/tinyfilemanager/commit/154947ef83efeb68fc2b921065392b6a7fc9c965
Restart Required: No
Instructions:
1. Download tinyfilemanager version 2.4.7 or later from GitHub. 2. Replace existing installation files with new version. 3. Verify the fix by checking version number.
🔧 Temporary Workarounds
Web Server Directory Restrictions
allConfigure web server to restrict access to parent directories using directory traversal protection.
# For Apache: Set 'AllowOverride None' in directory configuration
# For Nginx: Use 'location' blocks with proper path restrictions
File Permission Hardening
linuxRestrict file permissions on sensitive directories and configuration files.
chmod 600 sensitive_config_files
chown root:root sensitive_directories
🧯 If You Can't Patch
- Remove tinyfilemanager from internet-facing systems immediately
- Implement strict network access controls to limit access to vulnerable instances
🔍 How to Verify
Check if Vulnerable:
Check if tinyfilemanager version is below 2.4.7 by examining the source code or version file.Check Version:
grep -r 'version' tinyfilemanager_files/ | grep -i '2.4'Verify Fix Applied:
Verify installation is version 2.4.7 or later and test path traversal attempts return proper errors.📡 Detection & Monitoring
Log Indicators:
- Multiple failed attempts to access '../' or '..\' patterns in file requests
- Unusual file access patterns outside normal directories
Network Indicators:
- HTTP requests containing '../' sequences in file parameters
- Requests for known sensitive files like /etc/passwd, config files
SIEM Query:
source="web_logs" AND (url="*../*" OR url="*..\\*" OR url="*/etc/passwd" OR url="*/config*" )🔗 References
- https://github.com/prasathmani/tinyfilemanager/commit/154947ef83efeb68fc2b921065392b6a7fc9c965
- https://huntr.dev/bounties/5995a93f-0c4b-4f7d-aa59-a64424219424
- https://github.com/prasathmani/tinyfilemanager/commit/154947ef83efeb68fc2b921065392b6a7fc9c965
- https://huntr.dev/bounties/5995a93f-0c4b-4f7d-aa59-a64424219424
