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DiaenergieApplication · Deltaww

CVE-2021-38393

CRITICAL · 9.8 CVSS v3.1 Published 2021-08-30
Fix available
A fix is available. Upgrade to after 1.7.5 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A Blind SQL injection vulnerability exists in the /DataHandler/HandlerAlarmGroup.ashx endpoint of Delta Electronics DIAEnergie Version 1.7.5 and prior. The application does not properly validate the user-controlled value supplied through the parameter agid before using it as part of an SQL query. A remote, unauthenticated attacker can exploit this issue to execute arbitrary code in the context of NT SERVICE\MSSQLSERVER.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A blind SQL injection vulnerability exists in the /DataHandler/HandlerAlarmGroup.ashx endpoint of Delta Electronics DIAEnergie v1.7.5 and prior. The application fails to properly validate the user-controlled 'agid' parameter before using it in an SQL query. An unauthenticated remote attacker can exploit this to execute arbitrary code with NT SERVICE\MSSQLSERVER privileges.

MitigationApply the vendor patch or upgrade to DIAEnergie version 1.7.6 or later. As a temporary workaround, implement strict input validation and parameterized queries on the agid parameter.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
DiaenergieApplication
Affected:<= 1.7.5

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm DIAEnergie installation
    Check for DIAEnergie web application files in the web root directory (commonly C:\inetpub\wwwroot\DIAEnergie or similar path) or look for the application in IIS Manager.
    Affected if DIAEnergie is not installed on the system.
  2. Identify installed DIAEnergie version
    Locate the version information in the application's assemblies, configuration files, or the About page within the DIAEnergie web interface. Common files include version.dll, version.txt, or check the assembly version of DIAEnergie.dll.
    Affected if The installed version is 1.7.5 or prior (any version up to and including 1.7.5).
  3. Verify HandlerAlarmGroup.ashx endpoint exists
    Attempt to access the URL path /DataHandler/HandlerAlarmGroup.ashx on the DIAEnergie web server. This may return an error or empty response even if the file exists.
    Affected if The endpoint file HandlerAlarmGroup.ashx exists in the DataHandler folder.
  4. Check if agid parameter is processed without validation
    Review the source code of HandlerAlarmGroup.ashx if accessible, or test the endpoint by sending a request with the agid parameter (for example: /DataHandler/HandlerAlarmGroup.ashx?agid=1) and observe if SQL error messages are returned or if the application behaves differently based on boolean conditions.
    Affected if The agid parameter is accepted and used in SQL queries without proper input validation or parameterized queries.

A system is affected if it runs DIAEnergie version 1.7.5 or earlier and has the HandlerAlarmGroup.ashx endpoint accessible, with the agid parameter being processed without SQL injection protections.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 1.7.5
Interim mitigation

Apply the vendor patch or upgrade to DIAEnergie version 1.7.6 or later. As a temporary workaround, implement strict input validation and parameterized queries on the agid parameter.

Recommended fix High confidence

DIAEnergie version 1.8.0 or later

  1. 1. Identify all DIAEnergie installations in the environment and confirm current version (should be <= 1.7.5)
  2. 2. Prior to upgrade, perform a full backup of the DIAEnergie database and configuration
  3. 3. Obtain the updated DIAEnergie installer (version 1.8.0 or later) from Delta Electronics official channels
  4. 4. Schedule a maintenance window following organizational change management procedures
  5. 5. Stop all DIAEnergie services before applying the update
  6. 6. Run the installer and follow Delta Electronics upgrade documentation
  7. 7. Verify the upgrade was successful by checking the version number
  8. 8. Test critical functionality to ensure the application is operational
Caveat Review Delta Electronics release notes for version 1.8.0 for any configuration or compatibility changes before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Diaenergie Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing6.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,380
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-38393 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data