CVE-2012-1802
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 · uneditedBuffer overflow in the embedded web server on the Siemens Scalance X Industrial Ethernet switch X414-3E before 3.7.1, X308-2M before 3.7.2, X-300EEC before 3.7.2, XR-300 before 3.7.2, and X-300 before 3.7.2 allows remote attackers to cause a denial of service (device reboot) or possibly execute arbitrary code via a malformed URL.
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 confidenceBuffer overflow vulnerability in the embedded web server component of Siemens Scalance X-300 series industrial Ethernet switches allows remote attackers to cause denial of service via device reboot or potentially execute arbitrary code by sending malformed URL requests.
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<= 3.7.0= 1.2.2= 2.1.1= 2.2.0= 2.3.2= 2.3.3= 3.0.0= 3.0.2= 3.3.0= 3.4.0all versions<= 3.7.0= 3.1.1= 3.5.0= 3.5.2all versions<= 3.7.0= 3.5.0all versions<= 3.7.0= 3.1.1= 3.5.0all versionsCVSS 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
- Complete
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 device modelAccess the device console or web interface and retrieve the hardware model name. Check if the device is one of: Scalance X414 3e, Scalance X308 2m, Scalance X 300eec, or Scalance Xr 300.Affected if Device is NOT one of these four models - the vulnerability does not apply.
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Check firmware versionAccess the device web interface (typically via https) and navigate to System > Firmware or Info > Version to view the installed firmware version. Alternatively, use the device console and run 'show firmware' or similar command.Affected if Firmware version is <= 3.7.0 OR equals 1.2.2, 2.1.1, 2.2.0, 2.3.2, 2.3.3, 3.0.0, 3.0.2, 3.1.1, 3.3.0, 3.4.0, 3.5.0, or 3.5.2 - the device is running a vulnerable firmware version.
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Confirm web server is enabledIn the device web interface, navigate to HTTP/HTTPS settings or Web-Based Management settings. Verify that the embedded web server (HTTP or HTTPS) is enabled.Affected if Web server is disabled - the attack surface is not present, though the vulnerable code may still exist in firmware.
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Verify web management accessibilityAttempt to access the device web interface from a network location using a browser. Check if TCP ports 80 (HTTP) or 443 (HTTPS) are listening on the device and reachable from your network segment.Affected if The web interface is exposed to untrusted networks - remote exploitation is possible.
Device is affected if it is a Scalance X414 3e, X308 2m, X 300eec, or Xr 300 with vulnerable firmware (<=3.7.0 or specific listed versions) AND the embedded web server is enabled and network-accessible.
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 dataApply Siemens firmware updates (3.7.1 for X414-3E or 3.7.2 for X308-2M, X-300EEC, XR-300, X-300 models) to patch the vulnerability; if patching is not immediately feasible, restrict network access to the web server management interface.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-1802 — 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-2012-1802 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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