CVE-2014-5425
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 · uneditedIOServer before Beta2112.exe allows remote attackers to cause a denial of service (out-of-bounds read and master entry consumption) via a null DNP3 header.
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 confidenceIOServer (a DNP3 protocol server used in industrial control systems) suffers from an out-of-bounds read vulnerability when processing a null or malformed DNP3 header. Sending a specially crafted packet with an empty DNP3 header triggers the vulnerability, causing the server to read beyond buffer boundaries and consume master entries, leading to denial of service.
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<= 1.0.20.0CVSS 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
- Network
- Complexity
- Low
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:N/A:P
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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Verify IOServer installationLocate IOServer on the system - typical installation paths may include C:\Program Files\IOServer or similar. Check installed programs list or look for ioserver.exe binary.Affected if IOServer is found on the system
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Determine installed versionRight-click the ioserver.exe file, select Properties, then view the Details tab for version information. Alternatively, check the program's About or Help section within the application.Affected if Version displayed is 1.0.20.0 or lower
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Confirm DNP3 service is runningOpen Windows Services (services.msc) or use command 'sc query' to check if IOServer service is running. Also verify the application is actively listening on DNP3 ports (typically TCP 20000).Affected if IOServer service is running and DNP3 port is open/listening
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Assess network exposureReview firewall rules and network configuration to determine if the DNP3 service is accessible from untrusted networks. Use 'netstat -an' to identify bound IP addresses.Affected if DNP3 service is exposed to untrusted or external networks
If IOServer version 1.0.20.0 or lower is installed and the DNP3 service is running and network-accessible, the environment is affected by this vulnerability.
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 dataUpdate IOServer to Beta2112.exe or later. If patching is not immediately possible, restrict network access to the IOServer using firewalls or network segmentation to limit exposure to untrusted networks.
- Consultation6.0 h
- Implementation4.0 h
- Testing12.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2014-5425 — 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-2014-5425 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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