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Nexus Dashboard Fabric ControllerApplication · Cisco

CVE-2024-20348

HIGH · 7.5 CVSS v3.1 Published 2024-04-03
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
A vulnerability in the Out-of-Band (OOB) Plug and Play (PnP) feature of Cisco Nexus Dashboard Fabric Controller (NDFC) could allow an unauthenticated, remote attacker to read arbitrary files. This vulnerability is due to an unauthenticated provisioning web server. An attacker could exploit this vulnerability through direct web requests to the provisioning server. A successful exploit could allow the attacker to read sensitive files in the PnP container that could facilitate further attacks on the PnP infrastructure.

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 confidence

The vulnerability exists in the Out-of-Band Plug and Play (PnP) feature of Cisco Nexus Dashboard Fabric Controller. An unauthenticated provisioning web server allows remote attackers to read arbitrary files on the PnP container through direct web requests, potentially exposing sensitive data that could enable further attacks on the PnP infrastructure.

MitigationOrganizations should disable or restrict the unauthenticated PnP provisioning web server, implement proper authentication on the PnP service, and network-segment the PnP infrastructure to limit exposure to untrusted networks.

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
Nexus Dashboard Fabric ControllerApplication
Affected:= 12.1.3= 12.1.3b

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
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed product and version
    Access the Cisco Nexus Dashboard Fabric Controller admin interface or CLI and retrieve the exact software version number (typically via 'show version' or system information page)
    Affected if Version is exactly 12.1.3 or 12.1.3b
  2. Verify Out-of-Band PnP feature is enabled
    Review the PnP configuration in the Nexus Dashboard Fabric Controller admin panel or via CLI commands such as 'show pnp status' or 'show running-config pnp'
    Affected if The Out-of-Band Plug and Play provisioning feature is configured and enabled
  3. Confirm unauthenticated provisioning web server status
    Examine the PnP service configuration for settings that allow anonymous or unauthenticated access (look for parameters like 'anonymous-access enable', 'guest-enable', or similar in the PnP web server settings)
    Affected if The unauthenticated provisioning web server is enabled in the PnP configuration
  4. Assess network accessibility of PnP service
    Review network access controls, firewall rules, or service listening addresses to determine if the PnP web server port is exposed to untrusted networks or directly reachable from external IP addresses
    Affected if The PnP web server is network-accessible from untrusted or external networks

The environment is affected only if running version 12.1.3 or 12.1.3b with the PnP feature enabled and the unauthenticated provisioning web server exposed to the network.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Organizations should disable or restrict the unauthenticated PnP provisioning web server, implement proper authentication on the PnP service, and network-segment the PnP infrastructure to limit exposure to untrusted networks.

Recommended fix Moderate confidence

NDFC version 12.1.4 or later (contact Cisco TAC for exact fixed release)

  1. 1. Identify the current Cisco Nexus Dashboard Fabric Controller version by accessing the NDFC web UI or running 'show version' command
  2. 2. Download the fixed release from Cisco.com software downloads or contact Cisco TAC for the latest patched version
  3. 3. Review the Cisco Nexus Dashboard Fabric Controller release notes for version 12.1.4 or later for security fixes
  4. 4. Follow Cisco's standard NDFC upgrade procedure: create a backup, validate compatibility, and schedule maintenance window
  5. 5. Apply the upgrade to all NDFC cluster nodes according to Cisco upgrade documentation
  6. 6. After upgrade, verify the NDFC services are operational and confirm the PnP provisioning server is now properly authenticated
  7. 7. Validate that the vulnerability is remediated by reviewing the system configuration and running any post-upgrade security checks
Caveat Review NDFC release notes for any compatibility changes or configuration adjustments required when upgrading from 12.1.3/12.1.3b

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Nexus Dashboard Fabric Controller Scoped from the published advisory
  • Consultation6.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,600
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-20348 in production — separate from our analysis above.

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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  • No spam, self-promotion, credentials, or personal data