CVE-2022-29872
📋 TL;DR
This vulnerability in SICAM T devices allows authenticated attackers to send malicious POST requests that bypass parameter validation. Attackers can cause denial of service or execute arbitrary code by manipulating the program counter. All SICAM T devices running versions before V3.0 are affected.
💻 Affected Systems
- SICAM T
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing remote code execution, potential lateral movement within industrial control networks, and manipulation of critical infrastructure operations.
Likely Case
Denial of service attacks disrupting device functionality, potentially affecting industrial processes and monitoring capabilities.
If Mitigated
Limited impact if proper network segmentation, authentication controls, and monitoring are in place to detect anomalous POST requests.
🎯 Exploit Status
Requires authenticated access to the device web interface. Exploitation involves crafting malicious POST requests with invalid parameters.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V3.0 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-165073.html
Restart Required: Yes
Instructions:
1. Download SICAM T firmware version V3.0 or later from Siemens support portal. 2. Backup device configuration. 3. Apply firmware update following Siemens documentation. 4. Restart device. 5. Verify successful update and restore configuration if needed.
🔧 Temporary Workarounds
Network Segmentation
allIsolate SICAM T devices in separate network segments with strict access controls
Access Restriction
allImplement strict authentication controls and limit access to authorized personnel only
🧯 If You Can't Patch
- Implement network-based intrusion detection to monitor for anomalous POST requests to SICAM T devices
- Enforce strong authentication mechanisms and regularly audit user accounts with device access
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI. If version is below V3.0, device is vulnerable.Check Version:
Check via device web interface or refer to Siemens documentation for CLI commands specific to your SICAM T model.Verify Fix Applied:
Verify firmware version is V3.0 or higher after applying update. Test POST request handling with invalid parameters.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by POST requests with unusual parameters
- Device logs showing unexpected program counter changes or crash events
Network Indicators:
- Unusual POST request patterns to SICAM T web interface
- Traffic from unexpected sources to device management ports
SIEM Query:
source_ip=* AND dest_ip=SICAM_T_IP AND (http_method=POST AND (http_uri CONTAINS "/config" OR http_uri CONTAINS "/control") AND http_status=200 AND byte_count>threshold)