CVE-2023-0839
📋 TL;DR
This vulnerability in ProMIS Process Co. inSCADA allows attackers to perform account footprinting by exploiting improper protection of outbound error messages and alert signals. It affects inSCADA systems before version 20230115-1, potentially exposing user account information to unauthorized parties.
💻 Affected Systems
- ProMIS Process Co. inSCADA
📦 What is this software?
Inscada by Inscada Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers could enumerate all valid user accounts, enabling targeted credential attacks, privilege escalation, or lateral movement within SCADA/ICS environments.
Likely Case
Information disclosure allowing attackers to identify valid user accounts for subsequent brute-force or credential stuffing attacks.
If Mitigated
Limited information leakage with proper network segmentation and access controls preventing external attackers from reaching vulnerable interfaces.
🎯 Exploit Status
Based on CWE-1320 description, exploitation likely involves analyzing error responses to determine valid account information.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 20230115-1
Vendor Advisory: https://www.usom.gov.tr/bildirim/tr-23-0127
Restart Required: Yes
Instructions:
1. Contact ProMIS Process Co. for patch 20230115-1. 2. Apply patch following vendor instructions. 3. Restart affected inSCADA systems. 4. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate inSCADA systems from untrusted networks to prevent external exploitation.
Access Control Restrictions
allImplement strict firewall rules to limit access to inSCADA interfaces only to authorized IP addresses.
🧯 If You Can't Patch
- Implement network segmentation to isolate inSCADA systems from untrusted networks
- Deploy intrusion detection systems to monitor for account enumeration attempts
🔍 How to Verify
Check if Vulnerable:
Check inSCADA version; if earlier than 20230115-1, system is vulnerable. Test by sending malformed requests and observing if error responses leak account information.Check Version:
Check via inSCADA administrative interface or consult vendor documentation for version query method.Verify Fix Applied:
Verify version is 20230115-1 or later. Test that error responses no longer disclose account-related information.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts with varying usernames
- Unusual error messages in application logs indicating account validation responses
Network Indicators:
- Repeated requests to authentication endpoints with different parameters
- Abnormal traffic patterns to SCADA interfaces
SIEM Query:
source="inscada" AND (event_type="authentication_error" OR message="*account*" OR message="*user*") | stats count by src_ip