Memory requests not set in Deployments

ID: k8s-memory-requests-not-set

Severity: medium

Author: princechaddha

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

Description

Checks for missing memory requests in Kubernetes Deployments, which can lead to inefficient scheduling and potential node resource exhaustion.

YAML Source

id: k8s-memory-requests-not-set

info:
  name: Memory requests not set in Deployments
  author: princechaddha
  severity: medium
  description: Checks for missing memory requests in Kubernetes Deployments, which can lead to inefficient scheduling and potential node resource exhaustion.
  impact: |
    Missing memory requests in Kubernetes Deployments can lead to inefficient pod scheduling, causing potential resource exhaustion on nodes.
  remediation: Set memory requests for all containers in Kubernetes Deployments to ensure efficient pod scheduling and node resource utilization.
  reference:
    - https://kubernetes.io/docs/tasks/configure-pod-container/assign-memory-resource/
  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.resources && container.resources.requests && container.resources.requests.memory)) {
          let result = (`Deployment '${deployment.metadata.name}' in namespace '${deployment.metadata.namespace}' lacks memory requests.`);
          Export(result);
        }

    extractors:
      - type: dsl
        dsl:
          - response
# digest: 4a0a0047304502205602a0a19879241d008fc1aaf0ed232e3be8bcd179691ab58029f3fb07f993a20221008bbc1bff8a78a075a98faebe1e569c2ae315cf029164191da379768f1c03c417:922c64590222798bb761d5b6d8e72950

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-memory-requests-not-set.yaml"

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