mirror of
https://github.com/aquasecurity/kube-bench.git
synced 2024-11-29 03:18:27 +00:00
976 lines
38 KiB
YAML
976 lines
38 KiB
YAML
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---
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controls:
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version: "cis-1.24"
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id: 1
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text: "Control Plane Security Configuration"
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type: "master"
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groups:
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- id: 1.1
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text: "Control Plane Node Configuration Files"
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checks:
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- id: 1.1.1
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text: "Ensure that the API server configuration file permissions are set to 600 (Automated)"
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audit: "/bin/sh -c 'if test -e $apiserverconf; then stat -c permissions=%a $apiserverconf; fi'"
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod 600 $apiserverconf`
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scored: true
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- id: 1.1.2
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text: "Ensure that the API server configuration file ownership is set to root:root (Automated)"
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audit: "/bin/sh -c 'if test -e $apiserverconf; then stat -c %U:%G $apiserverconf; fi'"
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown root:root $apiserverconf`
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scored: true
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- id: 1.1.3
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text: "Ensure that the controller manager configuration file permissions are set to 600 (Automated)"
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audit: "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c permissions=%a $controllermanagerconf; fi'"
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod 600 $controllermanagerconf`
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scored: true
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- id: 1.1.4
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text: "Ensure that the controller manager configuration file ownership is set to root:root (Automated)"
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audit: "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c %U:%G $controllermanagerconf; fi'"
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown root:root $controllermanagerconf`
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scored: true
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- id: 1.1.5
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text: "Ensure that the scheduler configuration file permissions are set to 600 (Automated)"
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audit: "/bin/sh -c 'if test -e $schedulerconf; then stat -c permissions=%a $schedulerconf; fi'"
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod 600 $schedulerconf`
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scored: true
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- id: 1.1.6
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text: "Ensure that the scheduler configuration file ownership is set to root:root (Automated)"
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audit: "/bin/sh -c 'if test -e $schedulerconf; then stat -c %U:%G $schedulerconf; fi'"
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown root:root $schedulerconf`
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scored: true
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- id: 1.1.7
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text: "Ensure that the dqlite configuration file permissions are set to 644 or more restrictive (Automated)"
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audit: "/bin/sh -c 'if test -e $etcdconf; then stat -c permissions=%a $etcdconf; fi'"
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use_multiple_values: true
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod 600 $etcdconf`
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scored: true
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- id: 1.1.8
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text: "Ensure that the dqlite configuration file ownership is set to root:root (Automated)"
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audit: "/bin/sh -c 'if test -e $etcdconf; then stat -c %U:%G $etcdconf; fi'"
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use_multiple_values: true
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown root:root $etcdconf`
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scored: true
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- id: 1.1.9
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text: "Ensure that the Container Network Interface file permissions are set to 600 (Manual)"
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audit: |
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ps -ef | grep $kubeletbin | grep -- --cni-conf-dir | sed 's%.*cni-conf-dir[= ]\([^ ]*\).*%\1%' | xargs -I{} find {} -mindepth 1 | xargs --no-run-if-empty stat -c permissions=%a
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find /etc/cni/net.d/05-cilium.conflist -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a
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use_multiple_values: true
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod 600 /etc/cni/net.d/05-cilium.conflist`
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scored: false
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- id: 1.1.10
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text: "Ensure that the Container Network Interface file ownership is set to root:root (Manual)"
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audit: |
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find /etc/cni/net.d/05-cilium.conflist -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G
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use_multiple_values: true
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown root:root /etc/cni/net.d/05-cilium.conflist`
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scored: false
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- id: 1.1.11
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text: "Ensure that the dqlite data directory permissions are set to 700 or more restrictive (Automated)"
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audit: |
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DATA_DIR='/var/snap/k8s/common/var/lib/k8s-dqlite'
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stat -c permissions=%a "$DATA_DIR"
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "700"
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remediation: |
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Dqlite data are kept by default under /var/snap/k8s/common/var/lib/k8s-dqlite.
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To comply with the spirit of this CIS recommendation:
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`chmod 700 /var/snap/k8s/common/var/lib/k8s-dqlite`
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scored: true
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- id: 1.1.12
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text: "Ensure that the dqlite data directory ownership is set to root:root (Automated)"
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audit: |
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DATA_DIR='/var/snap/k8s/common/var/lib/k8s-dqlite'
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stat -c %U:%G "$DATA_DIR"
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Dqlite data are kept by default under /var/snap/k8s/common/var/lib/k8s-dqlite.
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To comply with the spirit of this CIS recommendation:
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`chown root:root /var/snap/k8s/common/var/lib/k8s-dqlite`
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scored: true
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- id: 1.1.13
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text: "Ensure that the admin.conf file permissions are set to 600 (Automated)"
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audit: "/bin/sh -c 'if test -e /etc/kubernetes/admin.conf; then stat -c permissions=%a /etc/kubernetes/admin.conf; fi'"
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod 600 /etc/kubernetes/admin.conf`
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scored: true
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- id: 1.1.14
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text: "Ensure that the admin.conf file ownership is set to root:root (Automated)"
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audit: "/bin/sh -c 'if test -e /etc/kubernetes/admin.conf; then stat -c %U:%G /etc/kubernetes/admin.conf; fi'"
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown root:root /etc/kubernetes/admin.conf`
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scored: true
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- id: 1.1.15
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text: "Ensure that the scheduler.conf file permissions are set to 600 (Automated)"
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audit: "/bin/sh -c 'if test -e $schedulerkubeconfig; then stat -c permissions=%a $schedulerkubeconfig; fi'"
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod 600 $schedulerkubeconfig`
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scored: true
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- id: 1.1.16
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text: "Ensure that the scheduler.conf file ownership is set to root:root (Automated)"
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audit: "/bin/sh -c 'if test -e $schedulerkubeconfig; then stat -c %U:%G $schedulerkubeconfig; fi'"
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown root:root $schedulerkubeconfig`
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scored: true
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- id: 1.1.17
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text: "Ensure that the controller-manager.conf file permissions are set to 600 (Automated)"
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audit: "/bin/sh -c 'if test -e $controllermanagerkubeconfig; then stat -c permissions=%a $controllermanagerkubeconfig; fi'"
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod 600 $controllermanagerkubeconfig`
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scored: true
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- id: 1.1.18
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text: "Ensure that the controller-manager.conf file ownership is set to root:root (Automated)"
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audit: "/bin/sh -c 'if test -e $controllermanagerkubeconfig; then stat -c %U:%G $controllermanagerkubeconfig; fi'"
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown root:root $controllermanagerkubeconfig`
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scored: true
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- id: 1.1.19
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text: "Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated)"
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audit: "find /etc/kubernetes/pki/ | xargs stat -c %U:%G"
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use_multiple_values: true
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tests:
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test_items:
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- flag: "root:root"
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remediation: |
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Run the following command on the control plane node.
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`chown -R root:root /etc/kubernetes/pki/`
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scored: true
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- id: 1.1.20
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text: "Ensure that the Kubernetes PKI certificate file permissions are set to 600 (Manual)"
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audit: "find /etc/kubernetes/pki/ -name '*.crt' | xargs stat -c permissions=%a"
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use_multiple_values: true
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tests:
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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Run the following command on the control plane node.
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`chmod -R 600 /etc/kubernetes/pki/*.crt`
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scored: false
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- id: 1.1.21
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text: "Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual)"
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audit: "find /etc/kubernetes/pki/ -name '*.key' | xargs stat -c permissions=%a"
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use_multiple_values: true
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tests:
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||
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test_items:
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- flag: "permissions"
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compare:
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op: bitmask
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value: "600"
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remediation: |
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||
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Run the following command on the control plane node.
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||
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|
||
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`chmod -R 600 /etc/kubernetes/pki/*.key`
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||
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scored: false
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||
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|
||
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- id: 1.2
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text: "API Server"
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checks:
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- id: 1.2.1
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text: "Ensure that the --anonymous-auth argument is set to false (Manual)"
|
||
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audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
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||
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tests:
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||
|
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test_items:
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||
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- flag: "--anonymous-auth"
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||
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compare:
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op: eq
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value: false
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remediation: |
|
||
|
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Edit the API server configuration file $apiserverconf
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||
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on the control plane node and set the following argument.
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||
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|
||
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`--anonymous-auth=false`
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||
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scored: false
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||
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|
||
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- id: 1.2.2
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text: "Ensure that the --token-auth-file parameter is not set (Automated)"
|
||
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audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
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||
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tests:
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||
|
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test_items:
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||
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- flag: "--token-auth-file"
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||
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set: false
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|
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remediation: |
|
||
|
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Follow the documentation and configure alternate mechanisms for authentication. Then,
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|
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edit the API server configuration file $apiserverconf
|
||
|
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on the control plane node and remove the --token-auth-file argument.
|
||
|
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scored: true
|
||
|
|
|
||
|
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- id: 1.2.3
|
||
|
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text: "Ensure that the --DenyServiceExternalIPs is not set (Automated)"
|
||
|
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audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
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bin_op: or
|
||
|
|
test_items:
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: nothave
|
||
|
|
value: "DenyServiceExternalIPs"
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
set: false
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and remove the `DenyServiceExternalIPs`
|
||
|
|
from enabled admission plugins.
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.4
|
||
|
|
text: "Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: and
|
||
|
|
test_items:
|
||
|
|
- flag: "--kubelet-client-certificate"
|
||
|
|
- flag: "--kubelet-client-key"
|
||
|
|
remediation: |
|
||
|
|
Follow the Kubernetes documentation and set up the TLS connection between the
|
||
|
|
apiserver and kubelets. Then, edit API server configuration file
|
||
|
|
$apiserverconf on the control plane node and set the
|
||
|
|
kubelet client certificate and key parameters as follows.
|
||
|
|
|
||
|
|
```
|
||
|
|
--kubelet-client-certificate=<path/to/client-certificate-file>
|
||
|
|
--kubelet-client-key=<path/to/client-key-file>
|
||
|
|
```
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.5
|
||
|
|
text: "Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--kubelet-certificate-authority"
|
||
|
|
remediation: |
|
||
|
|
Follow the Kubernetes documentation and setup the TLS connection between
|
||
|
|
the apiserver and kubelets. Then, edit the API server configuration file
|
||
|
|
$apiserverconf on the control plane node and set the
|
||
|
|
--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority.
|
||
|
|
|
||
|
|
`--kubelet-certificate-authority=<ca-string>`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.6
|
||
|
|
text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--authorization-mode"
|
||
|
|
compare:
|
||
|
|
op: nothave
|
||
|
|
value: "AlwaysAllow"
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow.
|
||
|
|
One such example could be as follows.
|
||
|
|
|
||
|
|
`--authorization-mode=Node,RBAC`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.7
|
||
|
|
text: "Ensure that the --authorization-mode argument includes Node (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--authorization-mode"
|
||
|
|
compare:
|
||
|
|
op: has
|
||
|
|
value: "Node"
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --authorization-mode parameter to a value that includes Node.
|
||
|
|
|
||
|
|
`--authorization-mode=Node,RBAC`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.8
|
||
|
|
text: "Ensure that the --authorization-mode argument includes RBAC (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--authorization-mode"
|
||
|
|
compare:
|
||
|
|
op: has
|
||
|
|
value: "RBAC"
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --authorization-mode parameter to a value that includes RBAC,
|
||
|
|
|
||
|
|
`--authorization-mode=Node,RBAC`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.9
|
||
|
|
text: "Ensure that the admission control plugin EventRateLimit is set (Manual)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: has
|
||
|
|
value: "EventRateLimit"
|
||
|
|
remediation: |
|
||
|
|
Follow the Kubernetes documentation and set the desired limits in a configuration file.
|
||
|
|
Then, edit the API server configuration file $apiserverconf
|
||
|
|
and set the following arguments.
|
||
|
|
|
||
|
|
```
|
||
|
|
--enable-admission-plugins=...,EventRateLimit,...
|
||
|
|
--admission-control-config-file=<path/to/configuration/file>
|
||
|
|
```
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.2.10
|
||
|
|
text: "Ensure that the admission control plugin AlwaysAdmit is not set (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: or
|
||
|
|
test_items:
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: nothave
|
||
|
|
value: AlwaysAdmit
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
set: false
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and either remove the --enable-admission-plugins parameter, or set it to a
|
||
|
|
value that does not include AlwaysAdmit.
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.11
|
||
|
|
text: "Ensure that the admission control plugin AlwaysPullImages is set (Manual)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: has
|
||
|
|
value: "AlwaysPullImages"
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --enable-admission-plugins parameter to include
|
||
|
|
AlwaysPullImages.
|
||
|
|
|
||
|
|
`--enable-admission-plugins=...,AlwaysPullImages,...`
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.2.12
|
||
|
|
text: "Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: or
|
||
|
|
test_items:
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: has
|
||
|
|
value: "SecurityContextDeny"
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: has
|
||
|
|
value: "PodSecurityPolicy"
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --enable-admission-plugins parameter to include
|
||
|
|
SecurityContextDeny, unless PodSecurityPolicy is already in place.
|
||
|
|
|
||
|
|
`--enable-admission-plugins=...,SecurityContextDeny,...`
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.2.13
|
||
|
|
text: "Ensure that the admission control plugin ServiceAccount is set (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: or
|
||
|
|
test_items:
|
||
|
|
- flag: "--disable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: nothave
|
||
|
|
value: "ServiceAccount"
|
||
|
|
- flag: "--disable-admission-plugins"
|
||
|
|
set: false
|
||
|
|
remediation: |
|
||
|
|
Follow the documentation and create ServiceAccount objects as per your environment.
|
||
|
|
Then, edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and ensure that the --disable-admission-plugins parameter is set to a
|
||
|
|
value that does not include ServiceAccount.
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.14
|
||
|
|
text: "Ensure that the admission control plugin NamespaceLifecycle is set (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: or
|
||
|
|
test_items:
|
||
|
|
- flag: "--disable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: nothave
|
||
|
|
value: "NamespaceLifecycle"
|
||
|
|
- flag: "--disable-admission-plugins"
|
||
|
|
set: false
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --disable-admission-plugins parameter to
|
||
|
|
ensure it does not include NamespaceLifecycle.
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.15
|
||
|
|
text: "Ensure that the admission control plugin NodeRestriction is set (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--enable-admission-plugins"
|
||
|
|
compare:
|
||
|
|
op: has
|
||
|
|
value: "NodeRestriction"
|
||
|
|
remediation: |
|
||
|
|
Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets.
|
||
|
|
Then, edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --enable-admission-plugins parameter to a
|
||
|
|
value that includes NodeRestriction.
|
||
|
|
|
||
|
|
`--enable-admission-plugins=...,NodeRestriction,...`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.16
|
||
|
|
text: "Ensure that the --secure-port argument is not set to 0 (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: or
|
||
|
|
test_items:
|
||
|
|
- flag: "--secure-port"
|
||
|
|
compare:
|
||
|
|
op: gt
|
||
|
|
value: 0
|
||
|
|
- flag: "--secure-port"
|
||
|
|
set: false
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and either remove the --secure-port parameter or
|
||
|
|
set it to a different (non-zero) desired port.
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.17
|
||
|
|
text: "Ensure that the --profiling argument is set to false (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--profiling"
|
||
|
|
compare:
|
||
|
|
op: eq
|
||
|
|
value: false
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the following argument.
|
||
|
|
|
||
|
|
`--profiling=false`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.18
|
||
|
|
text: "Ensure that the --audit-log-path argument is set (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--audit-log-path"
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --audit-log-path parameter to a suitable path and
|
||
|
|
file where you would like audit logs to be written.
|
||
|
|
|
||
|
|
`--audit-log-path=/var/log/apiserver/audit.log`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.19
|
||
|
|
text: "Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--audit-log-maxage"
|
||
|
|
compare:
|
||
|
|
op: gte
|
||
|
|
value: 30
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --audit-log-maxage parameter to 30
|
||
|
|
or as an appropriate number of days.
|
||
|
|
|
||
|
|
`--audit-log-maxage=30`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.20
|
||
|
|
text: "Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--audit-log-maxbackup"
|
||
|
|
compare:
|
||
|
|
op: gte
|
||
|
|
value: 10
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate
|
||
|
|
value.
|
||
|
|
|
||
|
|
`--audit-log-maxbackup=10`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.21
|
||
|
|
text: "Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--audit-log-maxsize"
|
||
|
|
compare:
|
||
|
|
op: gte
|
||
|
|
value: 100
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB.
|
||
|
|
|
||
|
|
`--audit-log-maxsize=100`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.22
|
||
|
|
text: "Ensure that the --request-timeout argument is set as appropriate (Manual)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
type: manual
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
and set the following argument as appropriate and if needed.
|
||
|
|
|
||
|
|
`--request-timeout=300s`
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.2.23
|
||
|
|
text: "Ensure that the --service-account-lookup argument is set to true (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: or
|
||
|
|
test_items:
|
||
|
|
- flag: "--service-account-lookup"
|
||
|
|
set: false
|
||
|
|
- flag: "--service-account-lookup"
|
||
|
|
compare:
|
||
|
|
op: eq
|
||
|
|
value: true
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the following argument.
|
||
|
|
|
||
|
|
`--service-account-lookup=true`
|
||
|
|
|
||
|
|
Alternatively, you can delete the --service-account-lookup argument from this file so
|
||
|
|
that the default takes effect.
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.24
|
||
|
|
text: "Ensure that the --service-account-key-file argument is set as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--service-account-key-file"
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --service-account-key-file parameter
|
||
|
|
to the public key file for service accounts.
|
||
|
|
|
||
|
|
`--service-account-key-file=<filename>`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.25
|
||
|
|
text: "Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated)"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--not-applicable"
|
||
|
|
set: false
|
||
|
|
remediation: |
|
||
|
|
Not applicable. Canonical K8s uses dqlite and the communication to this service is done through a
|
||
|
|
local socket (/var/snap/k8s/common/var/lib/k8s-dqlite/k8s-dqlite.sock) accessible to users with root permissions.
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.2.26
|
||
|
|
text: "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: and
|
||
|
|
test_items:
|
||
|
|
- flag: "--tls-cert-file"
|
||
|
|
- flag: "--tls-private-key-file"
|
||
|
|
remediation: |
|
||
|
|
Follow the Kubernetes documentation and set up the TLS connection on the apiserver.
|
||
|
|
Then, edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the TLS certificate and private key file parameters.
|
||
|
|
|
||
|
|
```
|
||
|
|
--tls-cert-file=<path/to/tls-certificate-file>
|
||
|
|
--tls-private-key-file=<path/to/tls-key-file>
|
||
|
|
```
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.27
|
||
|
|
text: "Ensure that the --client-ca-file argument is set as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--client-ca-file"
|
||
|
|
remediation: |
|
||
|
|
Follow the Kubernetes documentation and set up the TLS connection on the apiserver.
|
||
|
|
Then, edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the client certificate authority file.
|
||
|
|
|
||
|
|
`--client-ca-file=<path/to/client-ca-file>`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.2.28
|
||
|
|
text: "Ensure that the --etcd-cafile argument is set as appropriate (Automated)"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--not-applicable"
|
||
|
|
set: false
|
||
|
|
remediation: |
|
||
|
|
Not applicable. Canonical K8s uses dqlite and the communication to this service is done through a
|
||
|
|
local socket (/var/snap/k8s/common/var/lib/k8s-dqlite/k8s-dqlite.sock) accessible to users with root permissions.
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.2.29
|
||
|
|
text: "Ensure that the --encryption-provider-config argument is set as appropriate (Manual)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--encryption-provider-config"
|
||
|
|
remediation: |
|
||
|
|
Follow the Kubernetes documentation and configure a EncryptionConfig file.
|
||
|
|
Then, edit the API server configuration file $apiserverconf
|
||
|
|
on the control plane node and set the --encryption-provider-config parameter to the path of that file.
|
||
|
|
|
||
|
|
`--encryption-provider-config=</path/to/EncryptionConfig/File>`
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.2.30
|
||
|
|
text: "Ensure that encryption providers are appropriately configured (Manual)"
|
||
|
|
audit: |
|
||
|
|
ENCRYPTION_PROVIDER_CONFIG=$(ps -ef | grep $apiserverbin | grep -- --encryption-provider-config | sed 's%.*encryption-provider-config[= ]\([^ ]*\).*%\1%')
|
||
|
|
if test -e $ENCRYPTION_PROVIDER_CONFIG; then grep -A1 'providers:' $ENCRYPTION_PROVIDER_CONFIG | tail -n1 | grep -o "[A-Za-z]*" | sed 's/^/provider=/'; fi
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "provider"
|
||
|
|
compare:
|
||
|
|
op: valid_elements
|
||
|
|
value: "aescbc,kms,secretbox"
|
||
|
|
remediation: |
|
||
|
|
Follow the Kubernetes documentation and configure a EncryptionConfig file.
|
||
|
|
In this file, choose aescbc, kms or secretbox as the encryption provider.
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.2.31
|
||
|
|
text: "Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual)"
|
||
|
|
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--tls-cipher-suites"
|
||
|
|
compare:
|
||
|
|
op: valid_elements
|
||
|
|
value: "TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384"
|
||
|
|
remediation: |
|
||
|
|
Edit the API server configuration file /etc/kubernetes/manifests/kube-apiserver.yaml
|
||
|
|
on the control plane node and set the following argument.
|
||
|
|
|
||
|
|
```
|
||
|
|
--tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,
|
||
|
|
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
|
||
|
|
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
|
||
|
|
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
|
||
|
|
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
|
||
|
|
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
|
||
|
|
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,
|
||
|
|
TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384
|
||
|
|
```
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.3
|
||
|
|
text: "Controller Manager"
|
||
|
|
checks:
|
||
|
|
- id: 1.3.1
|
||
|
|
text: "Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Manual)"
|
||
|
|
audit: "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--terminated-pod-gc-threshold"
|
||
|
|
remediation: |
|
||
|
|
Edit the Controller Manager configuration file $controllermanagerconf
|
||
|
|
on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold.
|
||
|
|
|
||
|
|
`--terminated-pod-gc-threshold=10`
|
||
|
|
scored: false
|
||
|
|
|
||
|
|
- id: 1.3.2
|
||
|
|
text: "Ensure that the --profiling argument is set to false (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--profiling"
|
||
|
|
compare:
|
||
|
|
op: eq
|
||
|
|
value: false
|
||
|
|
remediation: |
|
||
|
|
Edit the Controller Manager configuration file $controllermanagerconf
|
||
|
|
on the control plane node and set the following argument.
|
||
|
|
|
||
|
|
`--profiling=false`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.3.3
|
||
|
|
text: "Ensure that the --use-service-account-credentials argument is set to true (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--use-service-account-credentials"
|
||
|
|
compare:
|
||
|
|
op: noteq
|
||
|
|
value: false
|
||
|
|
remediation: |
|
||
|
|
Edit the Controller Manager configuration file $controllermanagerconf
|
||
|
|
on the control plane node to set the following argument.
|
||
|
|
|
||
|
|
`--use-service-account-credentials=true`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.3.4
|
||
|
|
text: "Ensure that the --service-account-private-key-file argument is set as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--service-account-private-key-file"
|
||
|
|
remediation: |
|
||
|
|
Edit the Controller Manager configuration file $controllermanagerconf
|
||
|
|
on the control plane node and set the --service-account-private-key-file parameter
|
||
|
|
to the private key file for service accounts.
|
||
|
|
|
||
|
|
`--service-account-private-key-file=<filename>`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.3.5
|
||
|
|
text: "Ensure that the --root-ca-file argument is set as appropriate (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--root-ca-file"
|
||
|
|
remediation: |
|
||
|
|
Edit the Controller Manager configuration file $controllermanagerconf
|
||
|
|
on the control plane node and set the --root-ca-file parameter to the certificate bundle file.
|
||
|
|
|
||
|
|
`--root-ca-file=<path/to/file>`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.3.6
|
||
|
|
text: "Ensure that the RotateKubeletServerCertificate argument is set to true (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
bin_op: or
|
||
|
|
test_items:
|
||
|
|
- flag: "--feature-gates"
|
||
|
|
compare:
|
||
|
|
op: nothave
|
||
|
|
value: "RotateKubeletServerCertificate=false"
|
||
|
|
set: true
|
||
|
|
- flag: "--feature-gates"
|
||
|
|
set: false
|
||
|
|
remediation: |
|
||
|
|
Edit the Controller Manager configuration file $controllermanagerconf
|
||
|
|
on the control plane node and set the --feature-gates parameter to include RotateKubeletServerCertificate=true.
|
||
|
|
|
||
|
|
`--feature-gates=RotateKubeletServerCertificate=true`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.3.7
|
||
|
|
text: "Ensure that the --bind-address argument is set to 127.0.0.1 (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--bind-address"
|
||
|
|
compare:
|
||
|
|
op: eq
|
||
|
|
value: "127.0.0.1"
|
||
|
|
remediation: |
|
||
|
|
Edit the Controller Manager configuration file $controllermanagerconf
|
||
|
|
on the control plane node and ensure the correct value for the --bind-address parameter
|
||
|
|
and restart the controller manager service
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.4
|
||
|
|
text: "Scheduler"
|
||
|
|
checks:
|
||
|
|
- id: 1.4.1
|
||
|
|
text: "Ensure that the --profiling argument is set to false (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $schedulerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--profiling"
|
||
|
|
compare:
|
||
|
|
op: eq
|
||
|
|
value: false
|
||
|
|
remediation: |
|
||
|
|
Edit the Scheduler configuration file $schedulerconf file
|
||
|
|
on the control plane node and set the following argument.
|
||
|
|
|
||
|
|
`--profiling=false`
|
||
|
|
scored: true
|
||
|
|
|
||
|
|
- id: 1.4.2
|
||
|
|
text: "Ensure that the --bind-address argument is set to 127.0.0.1 (Automated)"
|
||
|
|
audit: "/bin/ps -ef | grep $schedulerbin | grep -v grep"
|
||
|
|
tests:
|
||
|
|
test_items:
|
||
|
|
- flag: "--bind-address"
|
||
|
|
compare:
|
||
|
|
op: eq
|
||
|
|
value: "127.0.0.1"
|
||
|
|
remediation: |
|
||
|
|
Edit the Scheduler configuration file $schedulerconf
|
||
|
|
on the control plane node and ensure the correct value for the --bind-address parameter
|
||
|
|
and restart the kube-scheduler service
|
||
|
|
scored: true
|