CVE-2023-39473
📋 TL;DR
This vulnerability allows authenticated remote attackers to execute arbitrary code on Inductive Automation Ignition systems by exploiting insecure deserialization in the AbstractGatewayFunction class. Attackers can gain SYSTEM-level privileges, enabling complete system compromise. Organizations using vulnerable Ignition installations are affected.
💻 Affected Systems
- Inductive Automation Ignition
📦 What is this software?
Ignition by Inductiveautomation
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with SYSTEM privileges, allowing data theft, ransomware deployment, lateral movement, and persistent backdoor installation.
Likely Case
Attacker gains full control over the Ignition server, potentially compromising industrial control systems and operational technology networks.
If Mitigated
Limited impact with proper network segmentation, authentication controls, and monitoring in place.
🎯 Exploit Status
Requires authentication but deserialization vulnerabilities are commonly weaponized. ZDI-CAN-17587 indicates coordinated disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Inductive Automation security advisory for specific patched versions
Vendor Advisory: https://inductiveautomation.com/security-advisory
Restart Required: Yes
Instructions:
1. Check current Ignition version
2. Download latest patched version from Inductive Automation
3. Backup configuration and data
4. Apply update following vendor instructions
5. Restart Ignition services
🔧 Temporary Workarounds
Network Segmentation
allIsolate Ignition servers from untrusted networks and limit access to authorized users only
Authentication Hardening
allImplement strong authentication policies, multi-factor authentication, and least privilege access
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor for suspicious deserialization attempts and authentication anomalies
🔍 How to Verify
Check if Vulnerable:
Check Ignition version against vendor advisory. Monitor for deserialization attempts in logs.Check Version:
Check Ignition web interface or installation directory for version informationVerify Fix Applied:
Confirm installation of patched version and test that deserialization payloads are rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual deserialization attempts
- Authentication from unexpected sources
- Abnormal process creation with SYSTEM privileges
Network Indicators:
- Suspicious traffic to Ignition gateway endpoints
- Unexpected outbound connections from Ignition server
SIEM Query:
source="ignition" AND (event_type="deserialization" OR process_name="cmd.exe" OR parent_process="java.exe")