CVE-2025-40713
📋 TL;DR
A critical SQL injection vulnerability in Quiter Gateway versions before 4.7.0 allows attackers to manipulate database operations through the campo parameter in the /<Client>FacturaE/BusquedasFacturasSesion endpoint. This affects organizations using Quiter Gateway for invoice management, potentially exposing sensitive financial data and system integrity.
💻 Affected Systems
- Quiter Gateway
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise allowing data theft, destruction, or ransomware deployment across all connected systems.
Likely Case
Unauthorized access to invoice and client data, financial fraud, and potential lateral movement to other systems.
If Mitigated
Limited data exposure if proper input validation and WAF rules are in place, but system remains vulnerable to skilled attackers.
🎯 Exploit Status
SQL injection vulnerabilities are commonly exploited with automated tools; no authentication required for the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.7.0
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-quiterweb-autoweb-quiter
Restart Required: Yes
Instructions:
1. Download Quiter Gateway version 4.7.0 from official vendor sources. 2. Backup current installation and database. 3. Stop Quiter Gateway service. 4. Install the new version. 5. Restart the service and verify functionality.
🔧 Temporary Workarounds
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns in the campo parameter.
# Example ModSecurity rule: SecRule ARGS:campo "@detectSQLi" "id:1001,phase:2,deny,status:403"
Endpoint Restriction
allBlock access to the vulnerable endpoint using network controls or application configuration.
# Apache: <Location "/<Client>FacturaE/BusquedasFacturasSesion"> Require all denied </Location>
# Nginx: location ~* /<Client>FacturaE/BusquedasFacturasSesion { deny all; }
🧯 If You Can't Patch
- Implement strict input validation on the campo parameter to only allow expected characters and lengths.
- Deploy database monitoring to detect unusual SQL queries and implement database-level access controls.
🔍 How to Verify
Check if Vulnerable:
Test the endpoint with SQL injection payloads in the campo parameter and observe database responses.Check Version:
Check Quiter Gateway admin interface or configuration files for version number.Verify Fix Applied:
After patching, attempt SQL injection tests and verify they are blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts or parameter manipulation in web server logs
- Unexpected database operations from web application user
Network Indicators:
- HTTP requests to /<Client>FacturaE/BusquedasFacturasSesion with SQL keywords in parameters
- Abnormal database traffic patterns
SIEM Query:
source="web_server" AND uri="/<Client>FacturaE/BusquedasFacturasSesion" AND (param="campo" AND value CONTAINS "UNION" OR value CONTAINS "SELECT" OR value CONTAINS "INSERT" OR value CONTAINS "DELETE")