CVE-2024-42417: Deltaww DIAEnergie SQL Injection Flaw

CVE-2024-42417 Overview

CVE-2024-42417 is an SQL injection vulnerability affecting Delta Electronics DIAEnergie, an industrial energy management system used in manufacturing and critical infrastructure environments. The flaw exists in the Handler_CFG.ashx script, which fails to properly sanitize user-supplied input before incorporating it into SQL queries. An authenticated attacker can send crafted requests to manipulate database queries and cause delays in the targeted product. The vulnerability is tracked under CWE-89: Improper Neutralization of Special Elements used in an SQL Command. The issue was published in the CISA ICS Advisory ICSA-24-277-03 and by Delta Electronics.

Critical Impact
Authenticated network attackers can inject SQL statements through Handler_CFG.ashx, impacting the confidentiality, integrity, and availability of the DIAEnergie database backend.

Affected Products

Delta Electronics DIAEnergie (industrial energy management platform)
Deployments exposing Handler_CFG.ashx to authenticated users
Refer to the Delta Electronics Cybersecurity Advisory for exact affected versions

Discovery Timeline

2024-10-03 - CVE-2024-42417 published to the National Vulnerability Database
2024-10-03 - CISA ICS Advisory ICSA-24-277-03 released
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-42417

Vulnerability Analysis

DIAEnergie exposes the Handler_CFG.ashx HTTP handler as part of its configuration interface. The handler accepts request parameters and forwards them into backend SQL queries without sufficient neutralization of special characters. An authenticated attacker can inject additional SQL clauses through these parameters, altering the intended query logic. Successful exploitation can cause resource-intensive queries that delay the product's response, and can lead to unauthorized read or modification of database contents.

The network-accessible attack surface combined with low attack complexity means that once an attacker has any valid credential, exploitation is straightforward. The vulnerability requires no user interaction, and the impacted database typically stores operational data for industrial energy monitoring.

Root Cause

The root cause is improper neutralization of special elements used in an SQL command ([CWE-89]). The Handler_CFG.ashx endpoint concatenates untrusted input directly into SQL query strings instead of using parameterized queries or prepared statements. Because no allow-list validation or type enforcement is applied, attacker-controlled tokens are interpreted as SQL syntax by the database engine.

Attack Vector

An attacker with valid low-privilege credentials sends HTTP requests to the Handler_CFG.ashx endpoint. The requests contain SQL metacharacters in parameter values that the handler passes to the database. The injected payload can introduce time-delay functions, boolean-based logic, or UNION-based data extraction. Because the vulnerability is reachable over the network, exposed DIAEnergie deployments accessible from operational technology or corporate networks are at greatest risk.

No public proof-of-concept exploit is currently listed in Exploit-DB, and the vulnerability is not on the CISA Known Exploited Vulnerabilities catalog. The EPSS score of 6.772% (93.28 percentile) indicates elevated relative exploitation likelihood compared to the broader CVE population.

Detection Methods for CVE-2024-42417

Indicators of Compromise

HTTP requests to Handler_CFG.ashx containing SQL metacharacters such as single quotes, --, ;, UNION, SELECT, or WAITFOR DELAY
Abnormally long response times from the DIAEnergie web service correlated with requests to configuration handlers
Unusual authenticated sessions originating from non-operator IP ranges targeting configuration endpoints
Database error messages surfaced in web server or application logs referencing malformed SQL from Handler_CFG.ashx

Detection Strategies

Deploy web application firewall (WAF) rules that inspect query strings and POST bodies to Handler_CFG.ashx for SQL injection signatures
Correlate authentication logs with web request logs to identify low-privileged accounts accessing configuration handlers
Enable SQL Server auditing to log parameterized versus concatenated query patterns originating from the DIAEnergie service account
Baseline normal request volume to Handler_CFG.ashx and alert on statistical deviations

Monitoring Recommendations

Forward DIAEnergie web server logs and database audit logs to a centralized analytics platform for correlation
Monitor for repeated HTTP 500 responses from the handler, which often accompany injection probing
Alert on outbound connections from the DIAEnergie host to unexpected destinations, which may indicate post-exploitation data staging

How to Mitigate CVE-2024-42417

Immediate Actions Required

Apply the vendor-provided update referenced in the Delta Electronics Cybersecurity Advisory
Restrict network access to the DIAEnergie web interface using firewall allow-lists limited to authorized operator workstations
Enforce strong, unique credentials and rotate any account that may have been exposed
Review authentication logs for suspicious activity against Handler_CFG.ashx since deployment

Patch Information

Delta Electronics has published remediation guidance in the Delta Electronics Cybersecurity Advisory. Administrators should consult CISA ICS Advisory ICSA-24-277-03 for the specific fixed version and upgrade procedure. Apply the update in a maintenance window and validate database integrity after installation.

Workarounds

Place DIAEnergie behind a reverse proxy or WAF that filters SQL injection payloads targeting Handler_CFG.ashx
Segment the DIAEnergie host into a dedicated operational technology (OT) VLAN with strict east-west controls
Remove or disable unnecessary DIAEnergie user accounts and enforce least-privilege access to configuration functionality
Monitor and rate-limit requests to configuration handlers until the patch is applied

bash

# Example iptables rule restricting DIAEnergie web access to a management subnet
iptables -A INPUT -p tcp --dport 443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP