Nx OsOperating system · Cisco
CVE-2015-4296
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 · uneditedNexus Data Broker (NDB) on Cisco Nexus 3000 devices with software 6.0(2)A6(1) allows remote attackers to cause a denial of service (Java process restart) via crafted connections to the Java application, aka Bug ID CSCut87006.
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 · moderate confidenceA denial of service vulnerability exists in Cisco Nexus Data Broker (NDB) on Nexus 3000 devices running software version 6.0(2)A6(1). Remote attackers can send crafted connections to the Java application, causing the Java process to restart repeatedly. This results in service disruption and availability impact.
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
Nx OsOperating system
= 6.0\(2\)a6\(1\)CVSS 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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Identify Nexus 3000 series hardwareUse 'show hardware' or 'show module' commands to confirm the device model is Nexus 3000 series (e.g., N3K-C3048, N3K-C3064)Affected if Device is not a Nexus 3000 series switch - not affected
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Verify Nexus Data Broker is installedCheck for NDB package installation using 'show install package' or 'show feature' command to confirm the ndb or nexus-data-broker feature is enabledAffected if NDB feature is not installed or enabled - not affected
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Check software versionExecute 'show version' or 'show system version' to retrieve the installed NX-OS version and confirm it is exactly 6.0(2)A6(1)Affected if Version is not 6.0(2)A6(1) - not affected
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Confirm NDB Java application is accessibleCheck NDB configuration and listening ports (typically Java-based NDB web interface or API ports) using 'show running-config' or port scanning to verify the application accepts remote connectionsAffected if NDB Java application is not running or not accessible remotely - lower risk but still running vulnerable version
If the device is a Nexus 3000 series switch with Cisco Nexus Data Broker installed and running software version 6.0(2)A6(1), the environment is affected by this CVE.
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 the appropriate Cisco software update or patch for version 6.0(2)A6(1) as specified in the Cisco bug CSCut87006. If no update is available, consider network segmentation to limit exposure to untrusted remote connections.
Fix this in Nx Os
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-4296 — 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-2015-4296 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
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