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@@ -508,15 +508,16 @@ for time-bound service account credentials.
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- [ ] Container images are configured to be run as unprivileged user.
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- [ ] References to container images are made by sha256 digests (rather than
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tags) or the provenance of the image is validated by verifying the image's
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digital signature at deploy time [via admission control](/docs/tasks/administer-cluster/verify-signed-images/#verifying-image-signatures-with-admission-controller).
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digital signature at deploy time [via admission control](/docs/tasks/administer-cluster/verify-signed-artifacts/#verifying-image-signatures-with-admission-controller).
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- [ ] Container images are regularly scanned during creation and in deployment, and
@@ -553,14 +554,14 @@ Avoid using image tags to reference an image, especially the `latest` tag, the
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image behind a tag can be easily modified in a registry. Prefer using the
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complete `sha256` digest which is unique to the image manifest. This policy can be
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enforced via an [ImagePolicyWebhook](/docs/reference/access-authn-authz/admission-controllers/#imagepolicywebhook).
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Image signatures can also be automatically [verified with an admission controller](/docs/tasks/administer-cluster/verify-signed-images/#verifying-image-signatures-with-admission-controller)
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Image signatures can also be automatically [verified with an admission controller](/docs/tasks/administer-cluster/verify-signed-artifacts/#verifying-image-signatures-with-admission-controller)
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at deploy time to validate their authenticity and integrity.
@@ -741,7 +742,7 @@ has permissions to use the image.
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- [Blog post "A Closer Look at NSA/CISA Kubernetes Hardening Guidance"](/blog/2021/10/05/nsa-cisa-kubernetes-hardening-guidance/#building-secure-container-images)
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for complementary resource on hardening Kubernetes clusters.
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