CPU Requests not set in Deployments

ID: k8s-cpu-requests-not-set

Severity: medium

Author: princechaddha

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

Description

Checks for missing CPU requests in Kubernetes Deployments, which can lead to inadequate scheduling and resource allocation.

YAML Source

id: k8s-cpu-requests-not-set

info:
  name: CPU Requests not set in Deployments
  author: princechaddha
  severity: medium
  description: Checks for missing CPU requests in Kubernetes Deployments, which can lead to inadequate scheduling and resource allocation.
  impact: |
    Missing CPU requests in Kubernetes Deployments can cause poor scheduling decisions and suboptimal resource allocation, potentially leading to degraded application performance.
  remediation: |
    Set CPU requests for all containers in Kubernetes Deplayments to ensure efficient scheduling and resource allocation.
  reference:
    - https://kubernetes.io/docs/tasks/configure-pod-container/assign-cpu-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.cpu)) {
          let result = (`Deployment '${deployment.metadata.name}' in namespace '${deployment.metadata.namespace}' lacks CPU requests.`);
          Export(result);
        }

    extractors:
      - type: dsl
        dsl:
          - response
# digest: 4a0a00473045022001ebebc6619f3db3dc9ca5e25aacadd7327988e4b095b3d6fb58ac3cddad85be022100cd14263e3f4420db97d978a0920b6281ffe9c203b3bf46a0aec23801cbe860a6:922c64590222798bb761d5b6d8e72950

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-cpu-requests-not-set.yaml"

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