CVE-2023-25910
📋 TL;DR
This critical vulnerability in Siemens industrial control software allows remote attackers with low privileges to execute arbitrary code with elevated privileges on database servers. It affects SIMATIC PCS 7, SIMATIC S7-PM, and SIMATIC STEP 7 V5 systems. Attackers can leverage embedded database functions to gain full control of affected systems.
💻 Affected Systems
- SIMATIC PCS 7
- SIMATIC S7-PM
- SIMATIC STEP 7 V5
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control systems leading to production disruption, safety incidents, or data exfiltration
Likely Case
Attacker gains administrative control of database server, potentially pivoting to other systems in industrial network
If Mitigated
Limited impact if proper network segmentation and privilege separation are implemented
🎯 Exploit Status
Requires low-privilege credentials; embedded database functions can be abused for code execution
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SIMATIC PCS 7: V9.1 SP2 UC04; SIMATIC S7-PM: V5.7 SP1 HF1 or V5.7 SP2 HF1; SIMATIC STEP 7 V5: V5.7
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-968170.html
Restart Required: Yes
Instructions:
1. Download appropriate patches from Siemens support portal. 2. Apply patches following Siemens industrial update procedures. 3. Restart affected systems. 4. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected systems from general corporate network and restrict access to necessary personnel only
Privilege Reduction
allImplement least privilege principle for database users and remove unnecessary embedded function access
🧯 If You Can't Patch
- Implement strict network access controls and firewall rules to limit access to affected systems
- Monitor for suspicious database function calls and implement application whitelisting
🔍 How to Verify
Check if Vulnerable:
Check software version against affected versions list; verify if database management system is accessible from networkCheck Version:
Check version through Siemens software management tools or Windows Control Panel > Programs and FeaturesVerify Fix Applied:
Confirm installed version matches patched versions; test that embedded database functions cannot be abused📡 Detection & Monitoring
Log Indicators:
- Unusual database function calls
- Privilege escalation attempts in database logs
- Unauthorized access to database management functions
Network Indicators:
- Unexpected database protocol traffic from unauthorized sources
- Connection attempts to database ports from unusual locations
SIEM Query:
source="database_logs" AND (event="privilege_escalation" OR event="unauthorized_function_call")