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Nuclei Templates

Ensure etcd cert and key set

ID: k8s-etcd-files-set

Severity: medium

Author: princechaddha

Tags: cloud,devops,kubernetes,devsecops,etcd,k8s,k8s-cluster-security

Description

Section titled “Description”

Checks if the etcd-certfile and etcd-keyfile arguments are properly set in the etcd server configuration, crucial for secure communication.

YAML Source

Section titled “YAML Source”
id: k8s-etcd-files-set


info:
  name: Ensure etcd cert and key set
  author: princechaddha
  severity: medium
  description: Checks if the etcd-certfile and etcd-keyfile arguments are properly set in the etcd server configuration, crucial for secure communication.
  impact: |
    If the etcd-certfile and etcd-keyfile arguments are not set, the etcd server might not encrypt its communications, potentially allowing unauthorized access to sensitive data.
  remediation: |
    Configure the etcd server to use etcd-certfile and etcd-keyfile arguments that point to valid certificate and key files respectively. This ensures that communications to and from the etcd server are properly encrypted.
  reference:
    - https://etcd.io/docs/v3.4.0/op-guide/security/
  tags: cloud,devops,kubernetes,devsecops,etcd,k8s,k8s-cluster-security


variables:
  argument: "etcd-certfile or etcd-keyfile"


self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      kubectl get pods -n kube-system -l component=etcd -o jsonpath="{.items[*].spec.containers[*].command}"


    matchers-condition: and
    matchers:
      - type: word
        words:
          - 'etcd'


      - type: word
        words:
          - "etcd-certfile"
          - "etcd-keyfile"
        negative: true


    extractors:
      - type: dsl
        dsl:
          - '"etcd server configuration is missing the " + argument + " arguments."'
# digest: 490a004630440220126894673e4731b91a0632913a7df5dbc3fd7db4beccdfa271ea70a8532046f0022078b3ed9498dd7c6cfe40608b955acdff647a7bd87e4e64177d065cf1e232c890:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “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.

Terminal window
$ nuclei -u "URL" -t "cloud/kubernetes/security-compliance/k8s-etcd-files-set.yaml"

View on Github