CVE-2013-3634
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 · uneditedA vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (Versions < V5.0.0 for CVE-2013-3633 and versions < V4.5.0 for CVE-2013-3634), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.1.0). The implementation of SNMPv3 does not check the user credentials sufficiently. Therefore, an attacker is able to execute SNMP commands without correct credentials.
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 SCALANCE X-200 and X-200IRT switch families contain a vulnerability in their SNMPv3 implementation where user credential validation is insufficient, allowing an attacker to execute SNMP commands without proper authentication. This is an authentication bypass in the SNMPv3 protocol handling of these industrial network switches.
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<= 5.0.0all versionsall versionsall versionsall versionsall versionsall 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
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/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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Identify the SCALANCE device modelLog into the switch web interface or use SNMP GET to query the sysDescr or sysObjectID OID (1.3.6.1.2.1.1.1 or 1.3.6.1.2.1.1.2) to determine the exact model numberAffected if The device is a SCALANCE X200 4p Irt, X201 3p Irt, X202 2irt, X202 2p Irt, X204irt, or Xf204irt (all versions are affected)
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Check the firmware version for X200irtAccess the switch web interface under the System > Firmware or System Information page, or use SNMP to query the firmware version OID if availableAffected if The device is a SCALANCE X200irt with firmware version 5.0.0 or earlier
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Verify if SNMPv3 is enabledAccess the switch web interface under SNMP > SNMPv3 or SNMP Settings, or use SNMP GET to query the snmpEnableAuthenTraps or related SNMP configuration OIDsAffected if SNMPv3 is currently enabled on the device - the vulnerability only applies when SNMPv3 is active
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Check SNMPv3 user configurationAccess the switch web interface under SNMP > SNMPv3 > Users, or attempt an SNMPv3 GET request with invalid or missing credentials to observe if authentication is enforcedAffected if SNMPv3 user accounts exist but authentication is not being validated (commands execute without proper credentials)
The environment is affected if the device is a SCALANCE X-200 or X-200IRT model with SNMPv3 enabled, particularly X200irt devices running firmware 5.0.0 or earlier.
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 firmware to V5.0.0 or later for SCALANCE X-200 family and V5.1.0 or later for X-200IRT family. If updates are not immediately feasible, disable SNMPv3 or enforce strict network segmentation to limit exposure to untrusted networks.
- Consultation8.0 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-2013-3634 — 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-2013-3634 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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