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rule(macro user_known_k8s_client_container): have more strict condition to avoid false positives #962

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Dec 11, 2019
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rule(macro user_known_k8s_client_container): have more strict condition to avoid false positives #962

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rule(macro user_known_k8s_client_container): have more strict conditi…
rung Dec 6, 2019
53d9b59
rule(macro user_known_k8s_client_container): Rephrase the comment
rung Dec 6, 2019
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6 changes: 4 additions & 2 deletions rules/falco_rules.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -2646,13 +2646,15 @@
- list: k8s_client_binaries
items: [docker, kubectl, crictl]

# Whitelist for known docker client binaries run inside container
# - k8s.gcr.io/fluentd-gcp-scaler in GCP/GKE
- macro: user_known_k8s_client_container
condition: (k8s.ns.name = "kube-system")
condition: (k8s.ns.name="kube-system" and container.image.repository=k8s.gcr.io/fluentd-gcp-scaler)

- rule: The docker client is executed in a container
desc: Detect a k8s client tool executed inside a container
condition: spawned_process and container and not user_known_k8s_client_container and proc.name in (k8s_client_binaries)
output: "Docker or kubernetes client executed in container (user=%user.name %container.info parent=%proc.pname cmdline=%proc.cmdline)"
output: "Docker or kubernetes client executed in container (user=%user.name %container.info parent=%proc.pname cmdline=%proc.cmdline image=%container.image.repository:%container.image.tag)"
priority: WARNING
tags: [container, mitre_execution]

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