CVE-2025-40831
📋 TL;DR
A vulnerability in SINEC Security Monitor allows authenticated low-privileged attackers to cause denial of service in the report generation functionality by exploiting improper input validation of date parameters. This affects all versions before V4.10.0. The vulnerability requires authentication but minimal privileges to exploit.
💻 Affected Systems
- SINEC Security Monitor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete disruption of report generation functionality, potentially affecting security monitoring and compliance reporting capabilities.
Likely Case
Temporary unavailability of report generation features, requiring service restart to restore functionality.
If Mitigated
Minimal impact with proper input validation and monitoring in place.
🎯 Exploit Status
Exploitation requires authenticated access but minimal technical skill. The vulnerability is in input validation of date parameters.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V4.10.0 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-882673.html
Restart Required: Yes
Instructions:
1. Download SINEC Security Monitor V4.10.0 or later from Siemens support portal. 2. Backup current configuration. 3. Install the update following Siemens installation guide. 4. Restart the SINEC Security Monitor service.
🔧 Temporary Workarounds
Restrict Report Generation Access
allLimit report generation functionality to trusted administrators only.
Input Validation Proxy
allImplement a web application firewall or proxy to validate date parameters before reaching the application.
🧯 If You Can't Patch
- Implement strict access controls to limit who can generate reports
- Monitor for unusual report generation patterns or repeated failed attempts
🔍 How to Verify
Check if Vulnerable:
Check SINEC Security Monitor version in administration interface. If version is below V4.10.0, the system is vulnerable.Check Version:
Check via SINEC Security Monitor web interface under System Information or Administration settings.Verify Fix Applied:
Verify version is V4.10.0 or higher in administration interface and test report generation functionality.📡 Detection & Monitoring
Log Indicators:
- Multiple failed report generation attempts
- Unusual date parameter values in report requests
- Report service crash or restart logs
Network Indicators:
- Unusual patterns in report generation API calls
- Repeated requests with malformed date parameters
SIEM Query:
source="sinec_security_monitor" AND (event="report_generation_failed" OR event="service_restart") AND date_parameter="*malformed*"