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CVE-2022-0759 — Improper Certificate Validation in kubeclient —...

HIGH

Improper Certificate Validation in kubeclient

Published March 26, 2022Updated November 8, 2023Source: osv

Summary

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Advisory Timeline

  • First published March 26, 2022 (1662 days ago).
  • Last revised November 8, 2023 — 592 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update kubeclient to 4.9.3 or later
gem install kubeclient -v 4.9.3

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
kubeclient
rubygems
0.0.1, 0.0.2, 0.0.3, 0.0.4 (+67 more)4.9.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-295
    Improper Certificate ValidationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.1 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2022-0759?
Improper Certificate Validation in kubeclient This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.1/10).
How do I check if my project is affected by CVE-2022-0759?
CVE-2022-0759 affects kubeclient. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2022-0759 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.1

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-69p3-xp37-f692

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