CVE-2023-48428
📋 TL;DR
This vulnerability in SINEC INS allows malicious administrators to upload specially crafted certificates through the RADIUS configuration mechanism, bypassing validation checks. Successful exploitation could lead to denial-of-service conditions or potentially allow execution of system-level commands. All versions before V1.0 SP2 Update 2 are affected.
💻 Affected Systems
- SINEC INS
📦 What is this software?
Sinec Ins by Siemens
Sinec Ins by Siemens
Sinec Ins by Siemens
Sinec Ins by Siemens
Sinec Ins by Siemens
⚠️ Risk & Real-World Impact
Worst Case
Malicious admin gains system-level command execution, potentially compromising the entire SINEC INS installation and connected systems.
Likely Case
Denial-of-service condition disrupting RADIUS authentication services and potentially affecting network operations.
If Mitigated
Limited impact with proper certificate validation and admin privilege controls in place.
🎯 Exploit Status
Requires admin access and knowledge of certificate crafting. No public exploits known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V1.0 SP2 Update 2
Vendor Advisory: https://cert-portal.siemens.com/productcert/pdf/ssa-077170.pdf
Restart Required: Yes
Instructions:
1. Download V1.0 SP2 Update 2 from Siemens support portal. 2. Backup current configuration. 3. Apply the update following Siemens installation guide. 4. Restart the SINEC INS system. 5. Verify RADIUS configuration functionality.
🔧 Temporary Workarounds
Restrict Admin Access
allLimit administrative access to SINEC INS to trusted personnel only.
Certificate Validation Monitoring
allImplement monitoring for certificate uploads and changes to RADIUS configuration.
🧯 If You Can't Patch
- Implement strict access controls and audit logging for all admin activities
- Isolate SINEC INS systems from critical network segments and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check SINEC INS version in web interface or via system information. If version is below V1.0 SP2 Update 2, system is vulnerable.Check Version:
Check via SINEC INS web interface: System > Information > VersionVerify Fix Applied:
Verify version shows V1.0 SP2 Update 2 or higher in system information. Test RADIUS certificate upload functionality with invalid certificates to ensure proper validation.📡 Detection & Monitoring
Log Indicators:
- Unexpected certificate uploads to RADIUS configuration
- Admin user uploading certificates outside normal maintenance windows
- System crashes or restarts following certificate uploads
Network Indicators:
- RADIUS authentication failures following configuration changes
- Unusual admin access patterns to SINEC INS management interface
SIEM Query:
source="sinec-ins" AND (event="certificate_upload" OR event="radius_config_change") AND user_role="admin"