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mirror of https://github.com/aquasecurity/kube-bench.git synced 2024-12-24 23:48:26 +00:00
kube-bench/cfg/gke-1.2.0/node.yaml
Huang Huang 2d6bf55ab2
Support CIS Google Kubernetes Engine (GKE) Benchmark v1.2.0 (#1050)
* Support CIS Google Kubernetes Engine (GKE) Benchmark v1.2.0

* restore gke-1.0

Co-authored-by: Yoav Rotem <yoavrotems97@gmail.com>
2021-12-09 12:04:38 +02:00

335 lines
14 KiB
YAML

---
controls:
version: "gke-1.2.0"
id: 3
text: "Worker Node Security Configuration"
type: "node"
groups:
- id: 3.1
text: "Worker Node Configuration Files"
checks:
- id: 3.1.1
text: "Ensure that the proxy kubeconfig file permissions are set to 644 or more restrictive (Manual)"
audit: '/bin/sh -c ''if test -e $proxykubeconfig; then stat -c permissions=%a $proxykubeconfig; fi'' '
tests:
test_items:
- flag: "permissions"
compare:
op: bitmask
value: "644"
remediation: |
Run the below command (based on the file location on your system) on each worker node.
For example,
chmod 644 $proxykubeconfig
scored: false
- id: 3.1.2
text: "Ensure that the proxy kubeconfig file ownership is set to root:root (Manual)"
audit: '/bin/sh -c ''if test -e $proxykubeconfig; then stat -c %U:%G $proxykubeconfig; fi'' '
tests:
test_items:
- flag: root:root
remediation: |
Run the below command (based on the file location on your system) on each worker node.
For example, chown root:root $proxykubeconfig
scored: false
- id: 3.1.3
text: "Ensure that the kubelet configuration file permissions are set to 644 or more restrictive (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c permissions=%a $kubeletconf; fi'' '
tests:
test_items:
- flag: "permissions"
compare:
op: bitmask
value: "644"
remediation: |
Run the following command (using the config file location identied in the Audit step)
chmod 644 /var/lib/kubelet/config.yaml
scored: false
- id: 3.1.4
text: "Ensure that the kubelet configuration file ownership is set to root:root (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c %U:%G $kubeletconf; fi'' '
tests:
test_items:
- flag: root:root
remediation: |
Run the following command (using the config file location identied in the Audit step)
chown root:root /etc/kubernetes/kubelet.conf
scored: false
- id: 3.2
text: "Kubelet"
checks:
- id: 3.2.1
text: "Ensure that the --anonymous-auth argument is set to false (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: "--anonymous-auth"
path: '{.authentication.anonymous.enabled}'
compare:
op: eq
value: false
remediation: |
If using a Kubelet config file, edit the file to set authentication: anonymous: enabled to
false.
If using executable arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--anonymous-auth=false
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.2
text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --authorization-mode
path: '{.authorization.mode}'
compare:
op: nothave
value: AlwaysAllow
remediation: |
If using a Kubelet config file, edit the file to set authorization: mode to Webhook. If
using executable arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_AUTHZ_ARGS variable.
--authorization-mode=Webhook
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.3
text: "Ensure that the --client-ca-file argument is set as appropriate (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --client-ca-file
path: '{.authentication.x509.clientCAFile}'
set: true
remediation: |
If using a Kubelet config file, edit the file to set authentication: x509: clientCAFile to
the location of the client CA file.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_AUTHZ_ARGS variable.
--client-ca-file=<path/to/client-ca-file>
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.4
text: "Ensure that the --read-only-port argument is set to 0 (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: "--read-only-port"
path: '{.readOnlyPort}'
set: true
compare:
op: eq
value: 0
remediation: |
If using a Kubelet config file, edit the file to set readOnlyPort to 0.
If using command line arguments, edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
on each worker node and set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--read-only-port=0
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.5
text: "Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --streaming-connection-idle-timeout
path: '{.streamingConnectionIdleTimeout}'
compare:
op: noteq
value: 0
- flag: --streaming-connection-idle-timeout
path: '{.streamingConnectionIdleTimeout}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to set streamingConnectionIdleTimeout to a
value other than 0.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--streaming-connection-idle-timeout=5m
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.6
text: "Ensure that the --protect-kernel-defaults argument is set to true (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --protect-kernel-defaults
path: '{.protectKernelDefaults}'
set: true
compare:
op: eq
value: true
remediation: |
If using a Kubelet config file, edit the file to set protectKernelDefaults: true.
If using command line arguments, edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
on each worker node and set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--protect-kernel-defaults=true
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.7
text: "Ensure that the --make-iptables-util-chains argument is set to true (Automated) "
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --make-iptables-util-chains
path: '{.makeIPTablesUtilChains}'
compare:
op: eq
value: true
- flag: --make-iptables-util-chains
path: '{.makeIPTablesUtilChains}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to set makeIPTablesUtilChains: true.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
remove the --make-iptables-util-chains argument from the
KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.8
text: "Ensure that the --hostname-override argument is not set (Manual)"
audit: "/bin/ps -fC $kubeletbin "
tests:
test_items:
- flag: --hostname-override
set: false
remediation: |
Edit the kubelet service file $kubeletsvc
on each worker node and remove the --hostname-override argument from the
KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.9
text: "Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --event-qps
path: '{.eventRecordQPS}'
set: true
compare:
op: eq
value: 0
remediation: |
If using a Kubelet config file, edit the file to set eventRecordQPS: to an appropriate level.
If using command line arguments, edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
on each worker node and set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.10
text: "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --tls-cert-file
path: '{.tlsCertFile}'
- flag: --tls-private-key-file
path: '{.tlsPrivateKeyFile}'
remediation: |
If using a Kubelet config file, edit the file to set tlsCertFile to the location
of the certificate file to use to identify this Kubelet, and tlsPrivateKeyFile
to the location of the corresponding private key file.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameters in KUBELET_CERTIFICATE_ARGS variable.
--tls-cert-file=<path/to/tls-certificate-file>
--tls-private-key-file=<path/to/tls-key-file>
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.11
text: "Ensure that the --rotate-certificates argument is not set to false (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --rotate-certificates
path: '{.rotateCertificates}'
compare:
op: eq
value: true
- flag: --rotate-certificates
path: '{.rotateCertificates}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to add the line rotateCertificates: true or
remove it altogether to use the default value.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS
variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.12
text: "Ensure that the RotateKubeletServerCertificate argument is set to true (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: RotateKubeletServerCertificate
path: '{.featureGates.RotateKubeletServerCertificate}'
compare:
op: eq
value: true
remediation: |
Edit the kubelet service file $kubeletsvc
on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable.
--feature-gates=RotateKubeletServerCertificate=true
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true