Liveness Probe Not Configured in Deployments

ID: k8s-liveness-probe-not-configured

Severity: medium

Author: princechaddha

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

Description

Checks for missing liveness probes in Kubernetes Deployments, which are essential for managing container health and automatic recovery

YAML Source

id: k8s-liveness-probe-not-configured

info:
  name: Liveness Probe Not Configured in Deployments
  author: princechaddha
  severity: medium
  description: Checks for missing liveness probes in Kubernetes Deployments, which are essential for managing container health and automatic recovery
  impact: |
    Absence of liveness probes can lead to unresponsive containers remaining in service, potentially degrading application performance and availability.
  remediation: Configure liveness probes for all containers in Kubernetes Deployments to ensure proper health checks and automatic restarts of failing containers
  reference:
    - https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
  tags: cloud,devops,kubernetes,k8s,devsecops,deployments,k8s-cluster-security

flow: |
  code(1);
  for (let deployment of template.items) {
    set("deployment",deployment)
    javascript(1);
  }

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: kubectl get deployments --all-namespaces --output=json
    extractors:
      - type: json
        name: items
        internal: true
        json:
          - '.items[]'

javascript:
  - code: |
        deployment = JSON.parse(template.deployment);
        if (!deployment.spec.template.spec.containers.some(container => container.livenessProbe)) {
          let result = (`Deployment '${deployment.metadata.name}' in namespace '${deployment.metadata.namespace}' lacks a configured liveness probe.`);
          Export(result);
        }

    extractors:
      - type: dsl
        dsl:
          - response
# digest: 4b0a00483046022100e2c6ab8810c08dce9356f0c3916aa1f7700aa54c41567271f6842ffc361a88b30221008d909d1eb145ab1e69dafd980061b781bba8bc4fe3edbb0283cbac9e1bee4042:922c64590222798bb761d5b6d8e72950

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 "cloud/kubernetes/deployments/k8s-liveness-probe-not-configured.yaml"

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