Memory limits not set in Deployments

ID: k8s-memory-limits-not-set

Severity: medium

Author: princechaddha

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

Description

Checks for missing memory limits in Kubernetes Deployments, which can lead to resource contention and instability

YAML Source

id: k8s-memory-limits-not-set

info:
  name: Memory limits not set in Deployments
  author: princechaddha
  severity: medium
  description: Checks for missing memory limits in Kubernetes Deployments, which can lead to resource contention and instability
  impact: |
    Missing memory limits in Kubernetes Deployments can cause resource contention and potential application instability.
  remediation: Set memory limits for all containers in Kubernetes Deployments to ensure resource management and application stability
  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.limits && container.resources.limits.memory)) {
          let result = (`Deployment '${deployment.metadata.name}' in namespace '${deployment.metadata.namespace}' lacks memory limits.`);
          Export(result);
        }

    extractors:
      - type: dsl
        dsl:
          - response
# digest: 4a0a004730450220485b39477db2add4c8b95137fdefbc18dfdf63c61ce89bbbaca68d6fad7396c802210099c2bd9d765e71dcc8e1009f9f23fe307c825c8f2d700e55587c3047974732a0:922c64590222798bb761d5b6d8e72950

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-limits-not-set.yaml"

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