CVE-2023-46283
📋 TL;DR
This CVE describes a buffer overflow vulnerability in multiple Siemens industrial automation products. An attacker can send specially crafted requests to port 4002/tcp to cause an out-of-bounds write, potentially crashing the affected application. The service auto-restarts after crashing, limiting the impact to availability rather than remote code execution.
💻 Affected Systems
- Opcenter Execution Foundation
- Opcenter Quality
- SIMATIC PCS neo
- SINEC NMS
- Totally Integrated Automation Portal (TIA Portal)
📦 What is this software?
Sinumerik Integrate Runmyhmi \/automotive by Siemens
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Totally Integrated Automation Portal by Siemens
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Totally Integrated Automation Portal by Siemens
View all CVEs affecting Totally Integrated Automation Portal →
Totally Integrated Automation Portal by Siemens
View all CVEs affecting Totally Integrated Automation Portal →
Totally Integrated Automation Portal by Siemens
View all CVEs affecting Totally Integrated Automation Portal →
Totally Integrated Automation Portal by Siemens
View all CVEs affecting Totally Integrated Automation Portal →
⚠️ Risk & Real-World Impact
Worst Case
Denial of service through application crash, disrupting industrial automation processes and potentially causing production downtime.
Likely Case
Application crash followed by auto-restart, causing brief service interruption but no persistent compromise.
If Mitigated
Minimal impact with proper network segmentation and access controls preventing unauthorized access to port 4002.
🎯 Exploit Status
Exploitation requires network access to port 4002 but no authentication. The vulnerability is a buffer overflow (CWE-120) that appears to only cause crashes rather than code execution based on the description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Opcenter Execution Foundation V2407, Opcenter Quality V2312, SIMATIC PCS neo V4.1, SINEC NMS V2.0 SP1, TIA Portal V17 Update 8, TIA Portal V18 Update 3
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-999588.html
Restart Required: Yes
Instructions:
1. Identify affected Siemens products and versions. 2. Download appropriate updates from Siemens support portal. 3. Apply updates following Siemens documentation. 4. Restart affected services/systems. 5. Verify patch application and functionality.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to port 4002/tcp using firewall rules to only trusted systems.
Windows Firewall: New-NetFirewallRule -DisplayName "Block Siemens Port 4002" -Direction Inbound -LocalPort 4002 -Protocol TCP -Action Block
Linux iptables: iptables -A INPUT -p tcp --dport 4002 -j DROP
Network Segmentation
allIsolate industrial control systems from general corporate networks using VLANs or physical separation.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems from untrusted networks.
- Deploy intrusion detection/prevention systems to monitor for exploitation attempts on port 4002.
🔍 How to Verify
Check if Vulnerable:
Check product versions against affected ranges. Use network scanning to identify systems with port 4002 open running Siemens software.Check Version:
Check within each Siemens application's about/help menu or system information. Commands vary by product.Verify Fix Applied:
Verify installed version matches or exceeds patched versions listed in vendor advisory. Test service functionality after patch.📡 Detection & Monitoring
Log Indicators:
- Application crash logs or unexpected restarts
- Failed connection attempts to port 4002
- Unusual network traffic patterns to industrial systems
Network Indicators:
- Multiple connection attempts to port 4002 from unusual sources
- Malformed packets targeting port 4002
SIEM Query:
source_port:4002 AND (event_type:connection_attempt OR event_type:application_crash)