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Enterprise Network Function Virtualization InfrastructureApplication · Cisco

CVE-2019-1971

CRITICAL · 9.8 CVSS v3.1 Published 2019-08-08
Fix available
A fix is available. Upgrade to after 3.8.1 or later.
See remediation →
100/100
Remediation priority · Urgent
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 web portal of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an unauthenticated, remote attacker to perform a command injection attack and execute arbitrary commands with root privileges. The vulnerability is due to insufficient input validation by the web portal framework. An attacker could exploit this vulnerability by providing malicious input during web portal authentication. A successful exploit could allow the attacker to execute arbitrary commands with root privileges on the underlying operating system.

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

A command injection vulnerability in the Cisco Enterprise NFV Infrastructure Software (NFVIS) web portal allows unauthenticated remote attackers to execute arbitrary commands with root privileges due to insufficient input validation during web portal authentication.

MitigationApply Cisco's security patch for CVE-2019-1971 to upgrade to a fixed version. Until patched, restrict network access to the management interface and disable the web portal if possible.

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
Enterprise Network Function Virtualization InfrastructureApplication
Affected:>= 3.6.2, <= 3.8.1

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

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

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 NFVIS version
    Access the NFVIS CLI or web portal and locate the software version information. On the CLI, this is typically shown in the startup banner or can be retrieved via 'show version' or 'show system information' commands.
    Affected if The installed version falls within the range >= 3.6.2 and <= 3.8.1
  2. Confirm web portal is enabled
    Check the NFVIS configuration to determine if the web portal (HTTP/HTTPS) service is active. This can be done via 'show webui status' or by reviewing the interface bindings in the configuration.
    Affected if The web portal interface is listening and accessible (HTTP or HTTPS services are enabled)
  3. Verify management interface accessibility
    Determine if the NFVIS management interface (where the web portal runs) is exposed to the network. Check interface bindings and network accessibility using 'show interface' or reviewing the running configuration for external-facing IP assignments.
    Affected if The management interface with the web portal is reachable from untrusted networks (not restricted to localhost or isolated management VLAN)

A system is affected if it is running NFVIS versions 3.6.2 through 3.8.1 with the web portal enabled and accessible, allowing unauthenticated attackers to inject commands through the authentication mechanism.

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
Upgrade available Upgrade to a release after 3.8.1
Interim mitigation

Apply Cisco's security patch for CVE-2019-1971 to upgrade to a fixed version. Until patched, restrict network access to the management interface and disable the web portal if possible.

Recommended fix High confidence

NFVIS 3.9.1 or later

  1. 1. Identify the current NFVIS version by running 'show version' or accessing the admin console
  2. 2. If version is between 3.6.2 and 3.8.1 (inclusive), plan for upgrade
  3. 3. Backup current configuration using 'archive config' or export via web portal
  4. 4. Download the fixed NFVIS release (3.9.1 or later) from Cisco (requires valid service contract)
  5. 5. Upload the new image via web portal or CLI: 'system image <image-file>'
  6. 6. Reboot the system to apply the new image: 'reload'
  7. 7. Verify the upgrade was successful and the new version is running: 'show version'
  8. 8. Confirm vulnerability is remediated by checking Cisco advisory for the fixed release
Caveat Review Cisco release notes for migration considerations; some configuration syntax may have changed between 3.8.x and 3.9.x

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

Fix this in Enterprise Network Function Virtualization Infrastructure Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.

Scan for this in your stack

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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-2019-1971 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data