CVE-2023-22419
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 · uneditedOut-of-bounds read vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) Version 1.6.9.0 and earlier. When processing a comment block in stage information, the end of data cannot be verified and out-of-bounds read occurs. As a result, opening a specially crafted project file may lead to information disclosure and/or arbitrary code execution.
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 confidenceOut-of-bounds read vulnerability in Kostac PLC Programming Software versions 1.6.9.0 and earlier. When processing comment blocks in stage information, the software fails to properly verify the end of data boundaries, allowing reads beyond allocated buffer limits. This memory corruption occurs when opening specially crafted project files, potentially exposing sensitive memory contents or enabling arbitrary code execution.
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<= 1.6.9.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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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Confirm Kostac PLC Programming Software is installedCheck the system for the presence of Kostac PLC Programming Software by looking in Program Files, Program Files (x86), or checking for the executable (typically named something like KostacPLC.exe or similar). Use PowerShell: Get-ChildItem -Path 'C:\Program Files','C:\Program Files (x86)' -Recurse -Filter '*Kostac*' -ErrorAction SilentlyContinueAffected if The software is found installed on the system
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Identify the installed version of Kostac PLC SoftwareRight-click the executable file, select Properties, then go to the Details tab to view the File Version. Alternatively, check the program's About or Help menu within the application for version informationAffected if The version number is 1.6.9.0 or earlier
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Verify the software handles project filesCheck if the software is configured to open .kpp or project files. Look in the software's options or settings for file association settings, or check if recent project files exist on the system using: Get-ChildItem -Path $env:USERPROFILE -Recurse -Include *.kpp,*.kpj -ErrorAction SilentlyContinueAffected if The software can open project files and such files exist or could be introduced from external sources
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Assess file import or project loading behaviorReview whether the software allows loading project files from external sources, network locations, or has import functionality for stage information or comment blocks. Check the application settings or documentation for project file handling optionsAffected if The software is configured to allow loading project files from untrusted or external sources
A system is affected if Kostac PLC Programming Software version 1.6.9.0 or earlier is installed and can open or load project files containing crafted comment blocks in stage information.
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 dataUpgrade to the latest version of Kostac PLC Programming Software when available. Until then, avoid opening project files from untrusted sources and implement network segmentation for systems running this software.
- Consultation2.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-22419 — 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-2023-22419 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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- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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