CVE-2025-40711
📋 TL;DR
A critical SQL injection vulnerability in Quiter Gateway allows attackers to manipulate database operations through the id_concesion parameter. This affects all versions prior to 4.7.0, potentially compromising the entire database system. Organizations using vulnerable Quiter Gateway installations are at risk.
💻 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 data access and manipulation of invoice/financial records leading to fraud or data breaches.
If Mitigated
Limited impact with proper input validation and database permissions restricting damage scope.
🎯 Exploit Status
SQL injection vulnerabilities are commonly exploited and weaponized quickly due to available tooling.
🛠️ 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 or later from official vendor sources. 2. Backup current installation and configuration. 3. Stop the Quiter Gateway service. 4. Install the updated version. 5. Restart the service and verify functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation for id_concesion parameter to allow only expected data types
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns targeting the vulnerable endpoint
🧯 If You Can't Patch
- Isolate the Quiter Gateway system from internet access and restrict internal network access
- Implement database-level controls: use least privilege accounts, enable auditing, and restrict database permissions
🔍 How to Verify
Check if Vulnerable:
Check Quiter Gateway version in administration interface or configuration files. If version is below 4.7.0, system is vulnerable.Check Version:
Check application configuration or admin panel for version informationVerify Fix Applied:
Confirm version is 4.7.0 or higher and test the /<Client>FacturaE/VerFacturaPDF endpoint with SQL injection test payloads that should be rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual database queries from application layer
- Multiple failed parameter validation attempts
- SQL syntax errors in application logs
Network Indicators:
- HTTP requests to /FacturaE/VerFacturaPDF with SQL keywords in parameters
- Unusual database connection patterns from application server
SIEM Query:
source="web_server" AND (url="*FacturaE/VerFacturaPDF*" AND (param="*id_concesion*" AND (value="*SELECT*" OR value="*UNION*" OR value="*OR*")))