CVE-2025-40620
📋 TL;DR
This is a critical SQL injection vulnerability in TCMAN's GIM v11 software that allows unauthenticated attackers to execute arbitrary SQL commands through the 'User' parameter. Attackers can read, modify, or delete all database information, potentially compromising the entire application. All organizations using vulnerable versions of TCMAN GIM v11 are affected.
💻 Affected Systems
- TCMAN GIM
📦 What is this software?
Gim by Tcman
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, authentication bypass, and potential lateral movement to other systems.
Likely Case
Data exfiltration including sensitive user information, configuration data, and potential credential harvesting.
If Mitigated
Limited impact if proper input validation and WAF rules block malicious requests, though risk remains until patched.
🎯 Exploit Status
SQL injection vulnerabilities are commonly exploited and this one requires no authentication, making it highly attractive to attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-tcmans-gim
Restart Required: No
Instructions:
1. Monitor vendor for security updates. 2. Apply patches immediately when available. 3. Test patches in non-production environment first.
🔧 Temporary Workarounds
Web Application Firewall Rules
allImplement WAF rules to block SQL injection patterns targeting the 'ValidateUserAndWS' endpoint
Input Validation Filter
allAdd server-side input validation to sanitize the 'User' parameter before processing
🧯 If You Can't Patch
- Isolate the vulnerable system from internet access and restrict internal network access
- Implement strict network segmentation and monitor all traffic to/from the affected system
🔍 How to Verify
Check if Vulnerable:
Test the 'ValidateUserAndWS' endpoint with SQL injection payloads in the 'User' parameterCheck Version:
Check application version through admin interface or configuration filesVerify Fix Applied:
Retest with SQL injection payloads after applying mitigations to confirm they are blocked📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed authentication attempts with SQL-like patterns
- Requests to 'ValidateUserAndWS' with suspicious 'User' parameter values
Network Indicators:
- Unusual database connection patterns from application server
- Large data transfers from database to unexpected sources
SIEM Query:
source="application_logs" AND ("ValidateUserAndWS" OR "SQL" OR "syntax") AND ("error" OR "exception")