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feat(checks): Deprecate remaining PSP checks #277

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merged 2 commits into from
Oct 24, 2024
Merged

feat(checks): Deprecate remaining PSP checks #277

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82951a5
feat(checks): Add a deprecation message for PSP
simar7 Oct 16, 2024
db7514d
fix spec id
simar7 Oct 23, 2024
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4 changes: 3 additions & 1 deletion checks/kubernetes/README.md
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Expand Up @@ -33,7 +33,9 @@ conftest test denied.yaml --policy myPolicy/ --namespace builtin.kubernetes.KSV0
This GitHub repository has controls that cover both [PodSecurityPolicy](https://kubernetes.io/docs/concepts/policy/pod-security-policy/) (PSP) and the Kubernetes [Pod Security Standards](https://kubernetes.io/docs/concepts/security/pod-security-standards/) (PSS), plus additional best practices.

## PSS and PSP
The Kubernetes Pod Security Standards (PSS) are the official standard for security best practices for pods. These standards overlaps with the checks that PodSecurityPolicies can enforce.
The following info is only a reference for historical purposes as PSP has been [deprecated](https://kubernetes.io/blog/2021/04/06/podsecuritypolicy-deprecation-past-present-and-future/).

The Kubernetes Pod Security Standards (PSS) are the official standard for security best practices for pods. These standards overlaps with the checks that PodSecurityPolicies (now deprecated) can enforce.

PSS has 14 controls that are grouped into three standards: Baseline, Restricted and Privileged. Appshield uses Baseline and Restricted; the Privileged standard specifically allows privileged execution. We named the controls in this repository under the PSS controls because they are more up-to-date and have better coverage than PSP. The below table maps PSS controls to PSP controls:

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5 changes: 5 additions & 0 deletions checks/kubernetes/cisbenchmarks/apiserver/security_context_deny_plugin.rego
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Expand Up @@ -9,6 +9,11 @@
# custom:
# id: KCV0013
# avd_id: AVD-KCV-0013
# frameworks:
# k8s-cis-1.23:
# - "1.2.13"
# rke2-cis-1.24:
# - "1.2.13"
# severity: LOW
# short_code: ensure-admission-control-plugin-security-context-deny-is-set-if-pod-security-policy-is-not-used
# recommended_action: "Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the Control Plane node and set the --enable-admission-plugins parameter to include SecurityContextDeny, unless PodSecurityPolicy is already in place."
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