CVE-2025-33015
📋 TL;DR
IBM Concert versions 1.0.0 through 2.1.0 contain an unrestricted file upload vulnerability that allows attackers to upload malicious files to the web interface. This could lead to remote code execution, data theft, or system compromise. Organizations using affected IBM Concert versions are at risk.
💻 Affected Systems
- IBM Concert
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, and lateral movement within the network.
Likely Case
Malware deployment, webshell installation, or denial of service through file system exhaustion.
If Mitigated
Limited impact if proper file validation and access controls are implemented.
🎯 Exploit Status
Exploitation requires access to the file upload interface, which typically requires authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.1 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7257006
Restart Required: Yes
Instructions:
1. Download IBM Concert version 2.1.1 or later from IBM support. 2. Backup current installation and data. 3. Install the updated version following IBM's deployment guide. 4. Restart the application services.
🔧 Temporary Workarounds
Implement file validation at web server level
allConfigure web server (Apache/Nginx/IIS) to block uploads of executable file types
# Apache example: Add to .htaccess
<FilesMatch "\.(php|exe|sh|bat|cmd)$">
Order Allow,Deny
Deny from all
</FilesMatch>
# Nginx example: Add to server block
location ~* \.(php|exe|sh|bat|cmd)$ {
deny all;
}
Restrict upload directory permissions
allSet upload directory to read-only for web server user
# Linux: chmod 555 /path/to/upload/directory
# Windows: icacls "C:\path\to\upload" /deny "IIS_IUSRS:(OI)(CI)(W)"
🧯 If You Can't Patch
- Implement strict file type validation at application level
- Deploy WAF with file upload protection rules
🔍 How to Verify
Check if Vulnerable:
Check IBM Concert version via admin interface or configuration files. If version is between 1.0.0 and 2.1.0 inclusive, system is vulnerable.Check Version:
Check application.properties or web interface admin panel for version informationVerify Fix Applied:
Verify version is 2.1.1 or later. Test file upload functionality with malicious file types to confirm they are rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with executable extensions
- Multiple failed upload attempts
- Files with suspicious names in upload directories
Network Indicators:
- POST requests to upload endpoints with unusual content types
- Large file uploads to application endpoints
SIEM Query:
source="web_server_logs" AND (uri="*upload*" OR uri="*file*" OR method="POST") AND (extension="php" OR extension="exe" OR extension="sh" OR extension="bat" OR extension="cmd")