CVE-2021-32983
📋 TL;DR
A blind SQL injection vulnerability in Delta Electronics DIAEnergie allows remote unauthenticated attackers to execute arbitrary SQL commands. This can lead to complete system compromise through arbitrary code execution as the SQL Server service account. All systems running DIAEnergie version 1.7.5 and earlier are affected.
💻 Affected Systems
- Delta Electronics DIAEnergie
📦 What is this software?
Diaenergie by Deltaww
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with attacker gaining full control over the SQL Server instance and potentially the underlying operating system as NT SERVICE\MSSQLSERVER.
Likely Case
Data exfiltration, database manipulation, and potential lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation and input validation controls in place.
🎯 Exploit Status
Blind SQL injection requires more sophisticated exploitation but is still accessible to moderately skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.8.0 or later
Vendor Advisory: https://www.deltaww.com/en-US/Service/SecurityAdvisory/Pages/20210621.aspx
Restart Required: Yes
Instructions:
1. Download DIAEnergie version 1.8.0 or later from Delta Electronics. 2. Backup current configuration and data. 3. Install the updated version following vendor instructions. 4. Restart the application and verify functionality.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to the DIAEnergie web interface to trusted IP addresses only.
Use firewall rules to block external access to port 80/443 on DIAEnergie servers
Web Application Firewall
allDeploy a WAF with SQL injection protection rules.
Configure WAF to block requests containing SQL injection patterns to /DataHandler/Handler_CFG.ashx
🧯 If You Can't Patch
- Isolate DIAEnergie systems in a separate network segment with strict access controls
- Implement network monitoring and IDS/IPS rules to detect SQL injection attempts
🔍 How to Verify
Check if Vulnerable:
Check DIAEnergie version in application interface or installation directory. Versions 1.7.5 and earlier are vulnerable.Check Version:
Check application interface or installation directory for version informationVerify Fix Applied:
Verify installed version is 1.8.0 or later and test that SQL injection attempts to /DataHandler/Handler_CFG.ashx are properly rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed requests to /DataHandler/Handler_CFG.ashx with SQL keywords
Network Indicators:
- HTTP requests to /DataHandler/Handler_CFG.ashx containing SQL injection patterns like UNION, SELECT, INSERT
SIEM Query:
source="web_server" AND uri="/DataHandler/Handler_CFG.ashx" AND (query="*UNION*" OR query="*SELECT*" OR query="*INSERT*")