47 lines
1.7 KiB
YAML
47 lines
1.7 KiB
YAML
id: k8s-readonly-fs
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info:
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name: Enforce Read-Only Filesystem for Containers
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author: princechaddha
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severity: critical
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description: Checks for containers that do not use a read-only filesystem, which can prevent malicious write operations at runtime
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impact: |
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Not using a read-only filesystem can expose containers to risks of malicious modifications at runtime, compromising the container's integrity and security.
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remediation: Configure containers to use read-only filesystems where possible to enhance security and minimize risk of unauthorized data modification
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reference:
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- https://kubernetes.io/docs/concepts/storage/volumes/#mount-propagation
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tags: cloud,devops,kubernetes,k8s,devsecops,pods,k8s-cluster-security
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flow: |
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code(1);
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for (let container of template.items) {
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set("container", container)
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javascript(1);
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}
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self-contained: true
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code:
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- engine:
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- sh
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- bash
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source: kubectl get pods --all-namespaces --output=json
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extractors:
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- type: json
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name: items
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internal: true
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json:
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- '.items[].spec.containers[]'
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javascript:
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- code: |
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container = JSON.parse(template.container);
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if (!container.securityContext || container.securityContext.readOnlyRootFilesystem !== true) {
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let result = (`Container '${container.name}' in pod '${container.metadata.name}' in namespace '${container.metadata.namespace}' does not use a read-only filesystem.`);
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Export(result);
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}
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extractors:
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- type: dsl
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dsl:
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- response
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# digest: 4b0a004830460221008d29bff5a9ee8436cbd007be3e8ea7d9adde22d7ba56b153dad3a298636f379e022100857902d59b4dc2849a6618197e3062762c537f08d7ff3b8b5c38e030bd054c2a:922c64590222798bb761d5b6d8e72950 |