CVE-2022-30228
📋 TL;DR
SICAM GridEdge (Classic) versions before V2.6.6 lack proper CORS restrictions, allowing attackers to trick authenticated users into executing malicious requests via cross-origin attacks. This affects all users of vulnerable SICAM GridEdge (Classic) installations.
💻 Affected Systems
- SICAM GridEdge (Classic)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the SICAM GridEdge system, allowing attackers to execute arbitrary commands, modify configurations, or disrupt grid operations.
Likely Case
Unauthorized data access, configuration changes, or limited command execution through authenticated user sessions.
If Mitigated
Attack fails due to proper network segmentation, user awareness training, and access controls limiting impact.
🎯 Exploit Status
Requires social engineering to trick authenticated users and knowledge of system endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V2.6.6
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-631336.html
Restart Required: Yes
Instructions:
1. Download V2.6.6 from Siemens support portal. 2. Backup current configuration. 3. Apply update following Siemens installation guide. 4. Restart system. 5. Verify version update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate SICAM GridEdge systems from untrusted networks and user workstations.
User Awareness Training
allTrain users to avoid clicking suspicious links while authenticated to critical systems.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate SICAM GridEdge from user workstations and internet.
- Deploy web application firewall with CORS policy enforcement and monitor for suspicious requests.
🔍 How to Verify
Check if Vulnerable:
Check SICAM GridEdge version via web interface or system logs. If version is below V2.6.6, system is vulnerable.Check Version:
Check via SICAM GridEdge web interface or consult Siemens documentation for version query commands.Verify Fix Applied:
Verify version shows V2.6.6 or higher in system interface and test CORS headers on critical endpoints.📡 Detection & Monitoring
Log Indicators:
- Unusual cross-origin requests to critical endpoints
- Multiple failed authentication attempts followed by successful CORS requests
Network Indicators:
- HTTP requests with Origin headers to SICAM GridEdge from unexpected domains
- CORS preflight requests to sensitive endpoints
SIEM Query:
source="SICAM GridEdge" AND (http.method="OPTIONS" OR http.headers.origin="*")