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KibanaApplication · Elastic

CVE-2017-8452

HIGH · 7.5 CVSS v3.0 Published 2017-06-16
Fix available
A fix is available. Upgrade to after 5.2.0 or later.
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
Kibana versions prior to 5.2.1 configured for SSL client access, file descriptors will fail to be cleaned up after certain requests and will accumulate over time until the process crashes.

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

Kibana versions prior to 5.2.1 configured for SSL client access contain a file descriptor leak where certain requests fail to properly clean up file descriptors. The descriptors accumulate over time until the process crashes from resource exhaustion.

MitigationUpgrade Kibana to version 5.2.1 or later. If immediate upgrade is not feasible, consider disabling SSL client access if not required, or implement monitoring for file descriptor usage as a compensating control.

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
KibanaApplication
Affected:<= 5.2.0

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
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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. Determine installed Kibana version
    Run 'kibana --version' or check the version field in the Kibana startup logs, or inspect the package.json file in the Kibana installation directory
    Affected if Version is 5.2.0 or earlier (any version listed as 5.2.0, 5.1.x, 5.0.x, or lower)
  2. Verify SSL client access is enabled
    Open the kibana.yml configuration file and search for SSL-related settings such as elasticsearch.ssl.verify, server.ssl.enabled, or any elasticsearch.ssl.* or server.ssl.* configuration options
    Affected if SSL is explicitly enabled for connections to Elasticsearch or for client access (any ssl.* setting set to true or pointing to certificate files)
  3. Check current file descriptor usage
    Run 'ls /proc/$(pgrep -f node)/fd | wc -l' on Linux to count open file descriptors, or use 'lsof -p <kibana_pid> 2>/dev/null | wc -l'
    Affected if File descriptor count is abnormally high or steadily increasing, indicating a leak may already be occurring

You are affected if Kibana version is 5.2.0 or earlier AND SSL client access is configured and enabled in your environment.

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.

From vendor data
Upgrade available Upgrade to a release after 5.2.0
Interim mitigation

Upgrade Kibana to version 5.2.1 or later. If immediate upgrade is not feasible, consider disabling SSL client access if not required, or implement monitoring for file descriptor usage as a compensating control.

Fix this in Kibana Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.

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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-2017-8452 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