CVE-2017-12737
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 issue was discovered on Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00. The integrated web server (port 80/tcp) of the affected devices could allow unauthenticated remote attackers to obtain sensitive device information over the network.
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 confidenceThe Siemens SICAM RTUs SM-2556 COM Modules with multiple firmware variants contain an unauthenticated information disclosure vulnerability in their integrated web server on port 80/tcp. Remote attackers can obtain sensitive device information without any authentication credentials.
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= dnpi00= enos00= erac00= eta2= etls00= modi00CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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 Siemens SM-2556 COM Module on the networkScan the network for devices responding on port 80/tcp and check the HTTP server banner or device web page for identifiers matching the SM-2556 COM module product name. Alternatively, review network documentation or asset inventories for Siemens SICAM RTU devices.Affected if The device is a Siemens SICAM RTU SM-2556 COM Module.
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Determine the firmware versionAccess the device web interface (port 80/tcp) and navigate to the system information or firmware version page. If the page is accessible without authentication, the firmware variant name (such as dnpi00, enos00, erac00, eta2, etls00, or modi00) will be displayed.Affected if The displayed firmware variant is one of: dnpi00, enos00, erac00, eta2, etls00, or modi00.
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Confirm the web server is accessible on port 80/tcpUse a port scanner or netcat to verify that port 80/tcp is open and accepting connections on the target device: nc -zv <target_ip> 80 or nmap -p 80 <target_ip>Affected if Port 80/tcp is open and responds to HTTP requests.
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Verify unauthenticated access to sensitive informationSend an HTTP GET request to the device without providing any authentication credentials (for example: curl http://<target_ip>/ or curl http://<target_ip>/device_info). Check if the response contains sensitive device information such as configuration details, network settings, or system data without requiring a login.Affected if Sensitive device information is returned without any authentication required.
You are affected if the target is a Siemens SM-2556 COM Module running one of the affected firmware variants (dnpi00, enos00, erac00, eta2, etls00, or modi00) and its web server on port 80/tcp returns sensitive information without authentication.
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 network access to port 80/tcp through firewall rules or network segmentation to prevent untrusted external access. If authentication can be enabled on the web server, implement it immediately.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-12737 — 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-2017-12737 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
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