CVE-2023-39463
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 · uneditedTriangle MicroWorks SCADA Data Gateway Trusted Certification Unrestricted Upload of File Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Triangle MicroWorks SCADA Data Gateway. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the trusted certification feature. The issue lies in the handling of the OpcUaSecurityCertificateAuthorityTrustDir variable, which allows an arbitrary file write with attacker-controlled data. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-20537.
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 confidenceTriangle MicroWorks SCADA Data Gateway contains an unrestricted file upload vulnerability in its trusted certification feature. The OpcUaSecurityCertificateAuthorityTrustDir variable is not properly validated, allowing an authenticated attacker to write arbitrary files to the system. Combined with an authentication bypass, this enables remote attackers to execute code in SYSTEM context.
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= 5.1.3.20324CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:H/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 checksWork through these to decide whether this CVE applies to you.
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Check installed SCADA Data Gateway versionLocate the Triangle MicroWorks SCADA Data Gateway installation and retrieve its version information, typically found in the application properties, About dialog, or installation directory metadataAffected if The installed version is exactly 5.1.3.20324
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Inspect OpcUaSecurityCertificateAuthorityTrustDir configurationSearch the application configuration files, registry keys, or runtime settings for the OpcUaSecurityCertificateAuthorityTrustDir parameter to determine its current valueAffected if This parameter is present and configured to point to a directory accessible by the application service account
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Verify certificate trust directory permissionsExamine file system permissions on the directory specified by OpcUaSecurityCertificateAuthorityTrustDir to determine if the application process has write accessAffected if The service account running SCADA Data Gateway has write permissions to the certificate trust directory
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Test certificate management interface accessibilityAttempt to access the certificate management or trust directory upload functionality through the web interface or API endpoint to determine if authentication is properly enforcedAffected if The certificate upload feature is accessible without valid authentication or accepts requests without proper session validation
A system is affected if it runs version 5.1.3.20324 and has the OpcUaSecurityCertificateAuthorityTrustDir feature enabled with writable directory permissions and accessible certificate management interfaces.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor dataRestrict write access to the certificate trust directory and implement proper input validation on the OpcUaSecurityCertificateAuthorityTrustDir parameter. Additionally, fix the authentication bypass mechanism to prevent unauthorized access to the certificate management functionality.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,448.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-39463 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-39463 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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