CVE-2017-6868
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 · uneditedAn Improper Authentication issue was discovered in Siemens SIMATIC CP 44x-1 RNA, all versions prior to 1.4.1. An unauthenticated remote attacker may be able to perform administrative actions on the Communication Process (CP) of the RNA series module, if network access to Port 102/TCP is available and the configuration file for the CP is stored on the RNA's CPU.
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 confidenceSiemens SIMATIC CP 44x-1 RNA modules prior to version 1.4.1 contain an improper authentication vulnerability that allows unauthenticated remote attackers to perform administrative actions on the Communication Process via Port 102/TCP when the configuration file is stored on the RNA's CPU.
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<= 1.4.0CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:H/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 checksWork through these to decide whether this CVE applies to you.
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Identify the SIMATIC CP 44x-1 RNA moduleLocate the physical device or inventory records to confirm the model is a Siemens SIMATIC CP 44x-1 Redundant Network Access moduleAffected if The device is a SIMATIC CP 44x-1 RNA module
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Check the installed firmware versionAccess the module's web interface, console, or use Siemens management tools (like STEP 7 or TIA Portal) to query the firmware versionAffected if Firmware version is 1.4.0 or earlier
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Verify Port 102/TCP exposureScan the network for open port 102/TCP on the RNA module using a port scanner (nmap -p 102 <target>) or check firewall rulesAffected if Port 102/TCP is externally accessible
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Check configuration storage locationAccess the module's configuration settings via its management interface and verify whether the configuration file is stored on the RNA's internal CPUAffected if Configuration files are stored on the RNA's CPU rather than an external source
A user is affected if they have a SIMATIC CP 44x-1 RNA module with firmware <= 1.4.0 that has Port 102/TCP exposed and stores its configuration on the internal CPU.
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 SIMATIC CP 44x-1 RNA firmware to version 1.4.1 or later. Additionally, restrict network access to Port 102/TCP and ensure configuration files are not stored on the RNA's CPU to mitigate the attack vector.
- Consultation6.0 h
- Implementation4.0 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-2017-6868 — 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-2017-6868 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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