CVE-2022-24253
📋 TL;DR
Extensis Portfolio v4.0 contains an authenticated unrestricted file upload vulnerability in the AdminFileTransferServlet component. This allows authenticated attackers to upload arbitrary files, potentially leading to remote code execution. Organizations running vulnerable versions of Extensis Portfolio are affected.
💻 Affected Systems
- Extensis Portfolio
📦 What is this software?
Portfolio by Extensis
⚠️ Risk & Real-World Impact
Worst Case
Authenticated attacker gains remote code execution with administrative privileges, leading to complete system compromise, data theft, and lateral movement.
Likely Case
Authenticated user uploads malicious files to execute arbitrary code, potentially gaining shell access or deploying malware.
If Mitigated
With proper network segmentation and least privilege, impact limited to the application server with no lateral movement.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once credentials are obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v4.0.1 or later
Vendor Advisory: http://extensis.com
Restart Required: Yes
Instructions:
1. Download latest version from Extensis website. 2. Backup configuration and data. 3. Install update following vendor instructions. 4. Restart Portfolio services.
🔧 Temporary Workarounds
Restrict AdminFileTransferServlet Access
allBlock or restrict access to the vulnerable servlet using web server configuration or firewall rules.
# Apache: <Location /AdminFileTransferServlet> Deny from all </Location>
# Nginx: location /AdminFileTransferServlet { deny all; }
Implement File Upload Restrictions
allConfigure Portfolio to only allow specific file types and implement file validation.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Portfolio servers from critical systems.
- Enforce strong authentication policies and monitor for suspicious file upload activities.
🔍 How to Verify
Check if Vulnerable:
Check Portfolio version in admin interface or configuration files. Version 4.0 is vulnerable.Check Version:
Check Portfolio web interface or consult application logs for version information.Verify Fix Applied:
Verify version is 4.0.1 or later and test file upload functionality with restricted file types.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to AdminFileTransferServlet
- Execution of unexpected files in Portfolio directories
- Authentication attempts followed by file uploads
Network Indicators:
- HTTP POST requests to /AdminFileTransferServlet with file uploads
- Unusual outbound connections from Portfolio server
SIEM Query:
source="portfolio.log" AND (uri="/AdminFileTransferServlet" OR file_upload="true")