CVE-2024-11609
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 · uneditedAutomationDirect C-More EA9 EAP9 File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of AutomationDirect C-More EA9. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of EAP9 files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-24772.
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 confidenceA stack-based buffer overflow vulnerability exists in the C-More EA9 EAP9 file parser. The parser fails to validate the length of user-supplied data before copying it into a fixed-size stack buffer, allowing attackers to overwrite stack memory and achieve remote code execution by tricking users into opening malicious EAP9 files.
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<= 6.78<= 6.78<= 6.78<= 6.78<= 6.78<= 6.78<= 6.78<= 6.78CVSS 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:3.0/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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Identify your C-More EA9 modelLocate the model number label on the device (T10cl, T10wcl, T12cl, T15cl, T15cl R, T6cl, T6cl R, or T8cl)Affected if model is NOT one of these eight listed models (then not affected)
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Check firmware versionAccess the C-More HMI interface, navigate to System Setup > Information, or use the C-More programming software to read the firmware versionAffected if firmware version is greater than 6.78 (then not affected)
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Verify EAP9 file parsing is usedDetermine if the HMI project or configuration involves loading or opening EAP9 files, which are C-More EA9 project backup filesAffected if EAP9 files are never opened or imported on this device (then not affected)
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Inspect recent file import activityReview HMI logs or project history for any recent imports of EAP9 files from external or untrusted sourcesAffected if no EAP9 files have been opened recently and the device has not been used to import project files (then not affected)
You are affected if your device is one of the eight listed models (T10cl, T10wcl, T12cl, T15cl, T15cl R, T6cl, T6cl R, or T8cl) running firmware version 6.78 or lower AND you open or import EAP9 files on that device.
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 dataAvoid opening EAP9 files from untrusted sources; apply vendor patches when available; consider file type validation and sandboxing as defense-in-depth.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-11609 — 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-2024-11609 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
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