CVE-2023-33472
📋 TL;DR
This vulnerability in Scada-LTS allows authenticated attackers with low-level privileges to escalate their permissions, execute arbitrary code, and access sensitive information through the Event Handlers function. It affects Scada-LTS versions up to v2.7.5.2 build 4551883606. Organizations using vulnerable Scada-LTS installations for industrial control systems are at risk.
💻 Affected Systems
- Scada-LTS
📦 What is this software?
Scada Lts by Scada Lts
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of SCADA system allowing attackers to manipulate industrial processes, cause physical damage, steal sensitive operational data, and maintain persistent access to critical infrastructure.
Likely Case
Privilege escalation leading to unauthorized access to sensitive SCADA data, configuration manipulation, and potential disruption of monitoring/control functions.
If Mitigated
Limited impact if proper network segmentation, least privilege access controls, and monitoring are implemented to detect and block exploitation attempts.
🎯 Exploit Status
Exploit details and proof-of-concept are publicly available. Attack requires low-level authentication but provides significant impact.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after v2.7.5.2 build 4551883606
Vendor Advisory: https://github.com/SCADA-LTS/Scada-LTS
Restart Required: Yes
Instructions:
1. Backup current Scada-LTS installation and data. 2. Download and install the latest Scada-LTS version from the official repository. 3. Restart the Scada-LTS service. 4. Verify Event Handlers function security improvements.
🔧 Temporary Workarounds
Restrict Event Handlers Access
allTemporarily disable or restrict access to the Event Handlers function for low-privilege users
# Modify user permissions in Scada-LTS admin interface to remove Event Handlers access from low-privilege accounts
Network Segmentation
allIsolate Scada-LTS instances from general network access
# Configure firewall rules to restrict access to Scada-LTS ports (typically 8080) to authorized IPs only
🧯 If You Can't Patch
- Implement strict access controls: Only grant minimum necessary permissions to users, especially for Event Handlers function
- Enhance monitoring: Deploy IDS/IPS rules to detect exploitation attempts and monitor for privilege escalation patterns
🔍 How to Verify
Check if Vulnerable:
Check Scada-LTS version in admin interface or configuration files. If version is v2.7.5.2 build 4551883606 or earlier, system is vulnerable.Check Version:
# Check Scada-LTS version via web interface at http://[scada-ip]:8080/Scada-LTS/login.htm or examine installation directory version filesVerify Fix Applied:
After patching, verify version is newer than v2.7.5.2 build 4551883606 and test that low-privilege users cannot exploit Event Handlers for privilege escalation.📡 Detection & Monitoring
Log Indicators:
- Unusual Event Handlers activity from low-privilege accounts
- Multiple failed authentication attempts followed by successful low-privilege login and Event Handlers access
- Privilege escalation attempts in system logs
Network Indicators:
- HTTP POST requests to Event Handlers endpoints from unexpected sources
- Unusual traffic patterns to Scada-LTS web interface
SIEM Query:
source="scada-lts" AND (event="privilege_escalation" OR event_handler="*" AND user_role="low")