CVE-2023-31242
📋 TL;DR
This authentication bypass vulnerability in Open Automation Software OAS Platform allows attackers to gain unauthorized access by sending specially-crafted network requests to the OAS Engine. Affected organizations using OAS Platform v18.00.0072 for industrial automation and SCADA systems are at risk of unauthorized system access.
💻 Affected Systems
- Open Automation Software OAS Platform
📦 What is this software?
Oas Platform by Openautomationsoftware
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control systems leading to operational disruption, data theft, or physical damage to industrial processes.
Likely Case
Unauthorized access to OAS Platform allowing data exfiltration, configuration changes, or lateral movement within industrial networks.
If Mitigated
Limited impact with proper network segmentation and authentication controls preventing exploitation attempts.
🎯 Exploit Status
Exploitation requires sending a specific sequence of network requests but no authentication is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v18.00.0073 or later
Vendor Advisory: https://openautomationsoftware.com/security-advisories/
Restart Required: Yes
Instructions:
1. Download latest version from Open Automation Software website. 2. Backup current configuration. 3. Install update following vendor instructions. 4. Restart OAS services.
🔧 Temporary Workarounds
Network Segmentation
allIsolate OAS Platform from untrusted networks and internet exposure
Access Control Lists
allRestrict network access to OAS Engine ports (58727/TCP by default)
# Windows firewall: netsh advfirewall firewall add rule name="Block OAS Engine" dir=in action=block protocol=TCP localport=58727 remoteip=any
# Linux iptables: iptables -A INPUT -p tcp --dport 58727 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate OAS Platform from untrusted networks
- Deploy intrusion detection systems to monitor for authentication bypass attempts
🔍 How to Verify
Check if Vulnerable:
Check OAS Platform version in administration console or via OAS Configuration utilityCheck Version:
# Windows: Check OAS version in installed programs list or registry HKEY_LOCAL_MACHINE\SOFTWARE\Open Automation SoftwareVerify Fix Applied:
Confirm version is v18.00.0073 or later and test authentication functionality📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful access
- Unusual sequence of requests to OAS Engine endpoints
- Authentication logs showing bypass patterns
Network Indicators:
- Unusual traffic patterns to OAS Engine port 58727/TCP
- Specific request sequences matching exploit patterns
SIEM Query:
source="OAS_Engine" AND (event_type="auth_failure" OR event_type="auth_bypass")