CVE-2024-25937: Deltaww DIAEnergie SQLi Vulnerability

CVE-2024-25937 Overview

CVE-2024-25937 is a SQL injection vulnerability [CWE-89] in Delta Electronics DIAEnergie, an industrial energy management system. The flaw resides in the DIAE_tagHandler.ashx script and allows authenticated attackers to inject arbitrary SQL statements over the network. Successful exploitation compromises confidentiality, integrity, and availability of the underlying database. The vulnerability carries a CVSS 3.1 score of 8.8 and an EPSS probability of 8.484% (94.554 percentile), indicating elevated exploitation likelihood relative to the broader CVE population. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) tracks this issue under advisory ICSA-24-074-12.

Critical Impact
Authenticated attackers can execute arbitrary SQL against the DIAEnergie backend, enabling data theft, tampering, and disruption of energy monitoring operations.

Affected Products

Delta Electronics DIAEnergie (industrial energy management platform)
Deployments exposing the DIAE_tagHandler.ashx endpoint
All versions prior to the vendor fix referenced in CISA ICSA-24-074-12

Discovery Timeline

2024-03-21 - CVE-2024-25937 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-25937

Vulnerability Analysis

DIAEnergie exposes the DIAE_tagHandler.ashx ASP.NET handler to authenticated users for tag-related operations. The handler passes user-supplied parameters into SQL statements without adequate parameterization or input sanitization. An attacker with valid low-privilege credentials can craft request parameters that break out of the intended query context. The database then executes attacker-controlled SQL alongside the legitimate query.

Because DIAEnergie stores operational technology (OT) telemetry, credentials, and configuration data, exploitation exposes sensitive industrial data and enables writes that alter energy metering records. Attackers can also chain SQL injection to command execution using database-native features such as xp_cmdshell on Microsoft SQL Server backends. This makes the endpoint a high-value pivot into industrial control system (ICS) networks.

Root Cause

The root cause is improper neutralization of special elements used in an SQL command [CWE-89]. The DIAE_tagHandler.ashx handler concatenates request parameters directly into SQL query strings instead of binding them through parameterized queries or a vetted ORM layer.

Attack Vector

Exploitation occurs over the network against the DIAEnergie web interface. The attacker requires low-level authentication but no user interaction. A single crafted HTTP request to DIAE_tagHandler.ashx is sufficient to trigger the injection, as documented in the CISA ICS Advisory ICSA-24-074-12.

No verified public proof-of-concept code has been published. Defenders should treat the endpoint as reachable by any authenticated user of the DIAEnergie portal.

Detection Methods for CVE-2024-25937

Indicators of Compromise

HTTP requests to DIAE_tagHandler.ashx containing SQL metacharacters such as ', --, ;, UNION, or SELECT in query or form parameters.
Web server logs showing repeated 500-series errors or unusually long response times from the DIAE_tagHandler.ashx endpoint.
Database audit records reflecting unexpected xp_cmdshell, sp_configure, or schema enumeration queries originating from the DIAEnergie service account.

Detection Strategies

Deploy web application firewall (WAF) signatures that inspect requests to /DIAE_tagHandler.ashx for SQL injection patterns.
Enable SQL Server audit logging on the DIAEnergie database and alert on statements referencing system tables like sysobjects or INFORMATION_SCHEMA.
Correlate authentication events with subsequent anomalous SQL activity to identify credential abuse against the handler.

Monitoring Recommendations

Forward DIAEnergie IIS logs and SQL Server audit trails to a centralized SIEM for correlation and retention.
Baseline normal parameter values submitted to DIAE_tagHandler.ashx and alert on outliers in length, encoding, or character set.
Monitor outbound connections from the DIAEnergie host to detect data exfiltration following successful injection.

How to Mitigate CVE-2024-25937

Immediate Actions Required

Apply the DIAEnergie update referenced in CISA ICS Advisory ICSA-24-074-12 as the primary remediation.
Restrict network access to the DIAEnergie web interface using firewall rules and place it behind a VPN or jump host.
Rotate credentials for all DIAEnergie users and the database service account after patching.

Patch Information

Delta Electronics has issued a fixed DIAEnergie release. Refer to the CISA advisory for the current supported version and download instructions. Verify the deployed build after upgrade and confirm that DIAE_tagHandler.ashx uses parameterized queries.

Workarounds

Block or restrict access to the DIAE_tagHandler.ashx endpoint at the reverse proxy or WAF until the patch is applied.
Enforce least-privilege on the DIAEnergie database account by removing sysadmin role membership and disabling xp_cmdshell.
Segment DIAEnergie servers on a dedicated ICS/OT VLAN with strict east-west controls per ISA/IEC 62443 guidance.

bash

# Example: block external access to the vulnerable endpoint at an NGINX reverse proxy
location ~* /DIAE_tagHandler\.ashx$ {
    allow 10.10.20.0/24;   # trusted OT management subnet
    deny  all;
    proxy_pass http://diaenergie-backend;
}