CVE-2023-37502
📋 TL;DR
HCL Compass has an unrestricted file upload vulnerability that allows attackers to upload malicious files containing executable code. This could lead to remote code execution on the server or client-side attacks via users' web browsers. All organizations using vulnerable versions of HCL Compass are affected.
💻 Affected Systems
- HCL Compass
📦 What is this software?
Hcl Compass by Hcltech
Hcl Compass by Hcltech
Hcl Compass by Hcltech
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through remote code execution, data theft, lateral movement within the network, and persistent backdoor installation.
Likely Case
Server compromise leading to data exfiltration, installation of malware, or use of the server as a pivot point for further attacks.
If Mitigated
Limited impact through proper file upload validation and execution restrictions, potentially only affecting file integrity.
🎯 Exploit Status
Exploitation requires file upload capability but appears straightforward based on the CWE-434 classification and CVSS score.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 23.1.2 and later
Vendor Advisory: https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0107510
Restart Required: Yes
Instructions:
1. Download HCL Compass version 23.1.2 or later from HCL support portal. 2. Backup current installation and data. 3. Run the installer to upgrade. 4. Restart all Compass services. 5. Verify functionality post-upgrade.
🔧 Temporary Workarounds
Disable file upload functionality
allTemporarily disable or restrict file upload features in HCL Compass configuration
Modify web.xml or application configuration to remove/restrict file upload servlets
Implement web application firewall rules
allBlock malicious file uploads at the network perimeter
Configure WAF to block file uploads with executable extensions (.jsp, .php, .exe, etc.)
🧯 If You Can't Patch
- Implement strict file type validation at the application layer
- Deploy network segmentation to isolate HCL Compass from critical systems
🔍 How to Verify
Check if Vulnerable:
Check HCL Compass version via administrative interface or by examining installation files. Versions below 23.1.2 are vulnerable.Check Version:
Check Compass version via web interface at /compass/admin or examine version.txt in installation directoryVerify Fix Applied:
Verify version is 23.1.2 or higher and test file upload functionality with various file types to ensure validation is working.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload activity
- Files with executable extensions being uploaded
- Multiple failed upload attempts
Network Indicators:
- POST requests to file upload endpoints with unusual file types
- Traffic patterns indicating file upload exploitation
SIEM Query:
source="hcl_compass" AND (event="file_upload" AND file_extension IN ("jsp","php","exe","bat"))