CVE-2023-50223
📋 TL;DR
This vulnerability in Inductive Automation Ignition allows authenticated remote attackers to execute arbitrary code with SYSTEM privileges by exploiting insecure deserialization in the ExtendedDocumentCodec class. It affects Ignition installations where attackers can reach the vulnerable component with valid credentials. The vulnerability enables complete system compromise.
💻 Affected Systems
- Inductive Automation Ignition
📦 What is this software?
Ignition by Inductiveautomation
⚠️ Risk & Real-World Impact
Worst Case
Full SYSTEM-level remote code execution leading to complete system compromise, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Authenticated attackers gaining SYSTEM privileges to execute arbitrary commands, potentially installing malware, stealing sensitive data, or disrupting industrial operations.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring, though the vulnerability still exists.
🎯 Exploit Status
Exploitation requires authentication but leverages well-known deserialization patterns. ZDI has published details, increasing likelihood of weaponization.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Ignition 8.1.34 and 9.0.10
Vendor Advisory: https://security.inductiveautomation.com/?tcuUid=fc4c4515-046d-4365-b688-693337449c5b
Restart Required: Yes
Instructions:
1. Download Ignition 8.1.34 or 9.0.10 from the Inductive Automation website. 2. Backup your Ignition configuration. 3. Run the installer to upgrade. 4. Restart the Ignition service. 5. Verify the version in the Ignition Gateway.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to Ignition servers to only trusted networks and users.
Strong Authentication Controls
allImplement multi-factor authentication, strong password policies, and account lockouts to reduce credential theft risk.
🧯 If You Can't Patch
- Implement strict network access controls to limit which users can reach Ignition servers.
- Monitor for suspicious authentication attempts and deserialization-related log entries.
🔍 How to Verify
Check if Vulnerable:
Check Ignition version in the Gateway webpage or via the Gateway status page. Versions below 8.1.34 or 9.0.10 are vulnerable.Check Version:
Check the Gateway webpage or look at the Ignition logs for version information.Verify Fix Applied:
Confirm the Ignition version is 8.1.34 or higher for version 8, or 9.0.10 or higher for version 9, after patching.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts followed by deserialization errors or unexpected process execution in Ignition logs.
Network Indicators:
- Suspicious HTTP requests to Ignition endpoints with serialized data payloads.
SIEM Query:
source="ignition.log" AND ("deserialization" OR "ExtendedDocumentCodec") AND severity=ERROR