Vulnerabilities in pkg:gem/kubeclient

PACKAGE
Advisory Identifier: GHSA-69p3-xp37-f692
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Advisory Summary

CVE-2022-0759 is a HIGH (CVSS 8.1) improper certificate validation vulnerability (CWE-295: Improper Certificate Validation) affecting Kubeclient libraries in the RubyGems ecosystem. The issue involves improper certificate validation in kubeclient. Remediation is available by upgrading affected packages to version 4.9.3.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:gem/kubeclient

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:gem/kubeclient. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-69p3-xp37-f692 CVE-2022-0759 HIGH Improper Certificate Validation in kubeclient

CVE-2022-0759 at a Glance

CVE Identifier CVE-2022-0759
GHSA Identifier GHSA-69p3-xp37-f692
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Kubeclient
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 8.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2022-0759

To remediate this vulnerability, upgrade all affected Kubeclient dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

kubeclient fixed: 4.9.3 
Upgrade kubeclient to 4.9.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for kubeclient

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-0759, inspect your project dependencies for Kubeclient:

inspect dependencies for kubeclient

Analyze the terminal output to locate any version of Kubeclient in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.9.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Kubeclient, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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).

CVE-2022-0759 Affected Kubeclient Versions

1 component(s)
Fixed Versions:
4.9.3
Product / Package Ecosystem Affected Versions Fixed Version
kubeclient
gem/kubeclient
RubyGems
< 4.9.3
4.9.3

References

NVD — CVE-2022-0759 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-0759
Kubeclient Source Repository REPOSITORY
https://github.com/ManageIQ/kubeclient/issues/554
Kubeclient Source Repository REPOSITORY
https://github.com/ManageIQ/kubeclient/issues/555
Kubeclient Source Repository REPOSITORY
https://github.com/ManageIQ/kubeclient/pull/556
Security Fix Commit FIX COMMIT
https://github.com/ManageIQ/kubeclient/commit/109ea71de5a8881748f03ebbe103b49f0f1c7887
Kubeclient Source Repository REPOSITORY
https://github.com/ManageIQ/kubeclient
Kubeclient Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/kubeclient/CVE-2022-0759.yml

Frequently Asked Questions

What is CVE-2022-0759?
CVE-2022-0759 is a security vulnerability in Kubeclient involving Improper Certificate Validation in kubeclient under CWE-295: Improper Certificate Validation.
Which Kubeclient versions are affected?
Affected versions include releases prior to 4.9.3 across affected packages: kubeclient.
What version fixes CVE-2022-0759?
Upgrading to 4.9.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is kubeclient affected?
Yes, kubeclient is affected in releases prior to 4.9.3. Upgrade your dependency to 4.9.3 or later.
What is the CVSS score of CVE-2022-0759?
CVE-2022-0759 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2022-0759?
CVE-2022-0759 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check RubyGems dependencies for CVE-2022-0759?
Run the dependency tree command: 'inspect dependencies for kubeclient'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-69p3-xp37-f692",
  "modified" : "2022-04-08T21:45:06Z",
  "published" : "2022-03-26T00:00:29Z",
  "aliases" : [ "CVE-2022-0759" ],
  "summary" : "Improper Certificate Validation in kubeclient",
  "details" : "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).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "kubeclient"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.9.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-0759"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ManageIQ/kubeclient/issues/554"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ManageIQ/kubeclient/issues/555"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ManageIQ/kubeclient/pull/556"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ManageIQ/kubeclient/commit/109ea71de5a8881748f03ebbe103b49f0f1c7887"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ManageIQ/kubeclient"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/kubeclient/CVE-2022-0759.yml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-30T13:12:44Z",
    "nvd_published_at" : "2022-03-25T19:15:00Z"
  }
}