mirror of
https://github.com/aquasecurity/kube-bench.git
synced 2024-11-25 09:28:16 +00:00
a9422a6623
* Overhaul K3s 1.X checks Signed-off-by: Derek Nola <derek.nola@suse.com> * Overhaul K3s 2.X Checks Signed-off-by: Derek Nola <derek.nola@suse.com> * Overhaul K3s 4.X checks Signed-off-by: Derek Nola <derek.nola@suse.com> * Overhaul K3s 5.X checks Signed-off-by: Derek Nola <derek.nola@suse.com> * Add K3s cis-1.8 scan Signed-off-by: Derek Nola <derek.nola@suse.com> * Fix K3s 1.1.10 check Signed-off-by: Derek Nola <derek.nola@suse.com> * Merge journalctl checks for K3s Signed-off-by: Derek Nola <derek.nola@suse.com> * Matched Manual/Automated to correct scoring (false/true) Signed-off-by: Derek Nola <derek.nola@suse.com> * Remove incorrect use of check_for_default_sa.sh script Signed-off-by: Derek Nola <derek.nola@suse.com> --------- Signed-off-by: Derek Nola <derek.nola@suse.com> Co-authored-by: afdesk <work@afdesk.com>
987 lines
42 KiB
YAML
987 lines
42 KiB
YAML
---
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controls:
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version: "k3s-cis-1.23"
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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 pod specification file permissions are set to 644 or more restrictive (Automated)"
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audit: "/bin/sh -c 'if test -e $apiserverconf; then stat -c permissions=%a $apiserverconf; fi'"
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type: "skip"
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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: "644"
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remediation: |
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Run the below command (based on the file location on your system) on the
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control plane node.
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For example, chmod 644 $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 pod specification 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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type: "skip"
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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 below command (based on the file location on your system) on the control plane node.
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For example, 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 pod specification file permissions are set to 644 or more restrictive (Automated)"
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audit: "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c permissions=%a $controllermanagerconf; fi'"
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type: "skip"
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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: "644"
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example, chmod 644 $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 pod specification 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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type: "skip"
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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 below command (based on the file location on your system) on the control plane node.
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For example, 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 pod specification file permissions are set to 644 or more restrictive (Automated)"
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audit: "/bin/sh -c 'if test -e $schedulerconf; then stat -c permissions=%a $schedulerconf; fi'"
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type: "skip"
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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: "644"
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example, chmod 644 $schedulerconf
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scored: true
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- id: 1.1.6
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text: "Ensure that the scheduler pod specification 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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type: "skip"
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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 below command (based on the file location on your system) on the control plane node.
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For example, 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 etcd pod specification 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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type: "skip"
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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: "644"
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example,
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chmod 644 $etcdconf
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scored: true
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- id: 1.1.8
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text: "Ensure that the etcd pod specification 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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type: "skip"
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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 below command (based on the file location on your system) on the control plane node.
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For example,
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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 644 or more restrictive (Manual)"
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type: "skip"
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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 /var/lib/cni/networks -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: "644"
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example, chmod 644 <path/to/cni/files>
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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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type: "skip"
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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 %U:%G
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find /var/lib/cni/networks -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 below command (based on the file location on your system) on the control plane node.
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For example,
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chown root:root <path/to/cni/files>
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scored: false
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- id: 1.1.11
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text: "Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated)"
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audit: "stat -c %a $etcddatadir"
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tests:
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test_items:
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- flag: "700"
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compare:
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op: eq
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value: "700"
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set: true
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remediation: |
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On the etcd server node, get the etcd data directory, passed as an argument --data-dir,
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from the command 'ps -ef | grep etcd'.
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Run the below command (based on the etcd data directory found above). For example,
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chmod 700 /var/lib/etcd
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scored: true
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- id: 1.1.12
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text: "Ensure that the etcd data directory ownership is set to etcd:etcd (Automated)"
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audit: ps -ef | grep $etcdbin | grep -- --data-dir | sed 's%.*data-dir[= ]\([^ ]*\).*%\1%' | xargs stat -c %U:%G
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type: "skip"
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tests:
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test_items:
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- flag: "etcd:etcd"
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remediation: |
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On the etcd server node, get the etcd data directory, passed as an argument --data-dir,
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from the command 'ps -ef | grep etcd'.
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Run the below command (based on the etcd data directory found above).
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For example, chown etcd:etcd /var/lib/etcd
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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 or more restrictive (Automated)"
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audit: "/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/admin.kubeconfig'"
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type: "skip"
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tests:
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test_items:
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- flag: "600"
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compare:
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op: eq
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value: "600"
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set: true
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example, chmod 600 /var/lib/rancher/k3s/server/cred/admin.kubeconfig
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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 /var/lib/rancher/k3s/server/cred/admin.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/admin.kubeconfig; fi'"
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tests:
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test_items:
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- flag: "root:root"
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compare:
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op: eq
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value: "root:root"
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set: true
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example, 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 644 or more restrictive (Automated)"
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audit: "/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; 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: "644"
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example,
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chmod 644 $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 /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; then stat -c %U:%G /var/lib/rancher/k3s/server/cred/scheduler.kubeconfig; 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 below command (based on the file location on your system) on the control plane node.
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For example,
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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 644 or more restrictive (Automated)"
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audit: "/bin/sh -c 'if test -e /var/lib/rancher/k3s/server/cred/controller.kubeconfig; then stat -c permissions=%a /var/lib/rancher/k3s/server/cred/controller.kubeconfig; 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: "644"
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example,
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chmod 644 $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: "stat -c %U:%G /var/lib/rancher/k3s/server/tls"
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tests:
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test_items:
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- flag: "root:root"
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compare:
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op: eq
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value: "root:root"
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set: true
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example,
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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 /var/lib/rancher/k3s/server/tls | 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 below command (based on the file location on your system) on the control plane node.
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For example,
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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 644 or more restrictive (Manual)"
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audit: "stat -c %n\ %a /var/lib/rancher/k3s/server/tls/*.crt"
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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: "644"
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remediation: |
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Run the below command (based on the file location on your system) on the control plane node.
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For example,
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chmod -R 644 /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: "stat -c %n\ %a /var/lib/rancher/k3s/server/tls/*.key"
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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 below command (based on the file location on your system) on the control plane node.
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For example,
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chmod -R 600 /etc/kubernetes/pki/*.key
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scored: false
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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: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'anonymous-auth'"
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type: manual
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tests:
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test_items:
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- flag: "--anonymous-auth"
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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 pod specification file $apiserverconf
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on the control plane node and set the below parameter.
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--anonymous-auth=false
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scored: false
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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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tests:
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test_items:
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- flag: "--token-auth-file"
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set: false
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remediation: |
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Follow the documentation and configure alternate mechanisms for authentication. Then,
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edit the API server pod specification file $apiserverconf
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on the control plane node and remove the --token-auth-file=<filename> parameter.
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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"
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tests:
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bin_op: or
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test_items:
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- flag: "--enable-admission-plugins"
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compare:
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op: nothave
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value: "DenyServiceExternalIPs"
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set: true
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- flag: "--enable-admission-plugins"
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set: false
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remediation: |
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Edit the API server pod specification file $apiserverconf
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on the control plane node and remove the `DenyServiceExternalIPs`
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from enabled admission plugins.
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scored: true
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- id: 1.2.4
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text: "Ensure that the --kubelet-https argument is set to true (Automated)"
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audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-https'"
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type: "skip"
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tests:
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bin_op: or
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test_items:
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- flag: "--kubelet-https"
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compare:
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op: eq
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value: true
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- flag: "--kubelet-https"
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set: false
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remediation: |
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Edit the API server pod specification file $apiserverconf
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on the control plane node and remove the --kubelet-https parameter.
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scored: true
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- id: 1.2.5
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text: "Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated)"
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audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority'"
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tests:
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bin_op: and
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test_items:
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- flag: "--kubelet-client-certificate"
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- flag: "--kubelet-client-key"
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remediation: |
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Follow the Kubernetes documentation and set up the TLS connection between the
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apiserver and kubelets. Then, edit API server pod specification file
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$apiserverconf on the control plane node and set the
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kubelet client certificate and key parameters as below.
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--kubelet-client-certificate=<path/to/client-certificate-file>
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--kubelet-client-key=<path/to/client-key-file>
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scored: true
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- id: 1.2.6
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text: "Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated)"
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audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'kubelet-certificate-authority'"
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tests:
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test_items:
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- flag: "--kubelet-certificate-authority"
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remediation: |
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Follow the Kubernetes documentation and setup the TLS connection between
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the apiserver and kubelets. Then, edit the API server pod specification file
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$apiserverconf on the control plane node and set the
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--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority.
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--kubelet-certificate-authority=<ca-string>
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scored: true
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- id: 1.2.7
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text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated)"
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audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode'"
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tests:
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test_items:
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- flag: "--authorization-mode"
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compare:
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op: nothave
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value: "AlwaysAllow"
|
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remediation: |
|
|
Edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the --authorization-mode parameter to values other than AlwaysAllow.
|
|
One such example could be as below.
|
|
--authorization-mode=RBAC
|
|
scored: true
|
|
|
|
- id: 1.2.8
|
|
text: "Ensure that the --authorization-mode argument includes Node (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--authorization-mode"
|
|
compare:
|
|
op: has
|
|
value: "Node"
|
|
remediation: |
|
|
Edit the API server pod specification 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: 1.2.9
|
|
text: "Ensure that the --authorization-mode argument includes RBAC (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'authorization-mode'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--authorization-mode"
|
|
compare:
|
|
op: has
|
|
value: "RBAC"
|
|
remediation: |
|
|
Edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the --authorization-mode parameter to a value that includes RBAC,
|
|
for example `--authorization-mode=Node,RBAC`.
|
|
scored: true
|
|
|
|
- id: 1.2.10
|
|
text: "Ensure that the admission control plugin EventRateLimit is set (Manual)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins'"
|
|
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 pod specification file $apiserverconf
|
|
and set the below parameters.
|
|
--enable-admission-plugins=...,EventRateLimit,...
|
|
--admission-control-config-file=<path/to/configuration/file>
|
|
scored: false
|
|
|
|
- id: 1.2.11
|
|
text: "Ensure that the admission control plugin AlwaysAdmit is not set (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins'"
|
|
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 pod specification 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: 1.2.12
|
|
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 pod specification file $apiserverconf
|
|
on the control plane node and set the --enable-admission-plugins parameter to include
|
|
AlwaysPullImages.
|
|
--enable-admission-plugins=...,AlwaysPullImages,...
|
|
scored: false
|
|
|
|
- id: 1.2.13
|
|
text: "Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used (Manual)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins'"
|
|
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 pod specification 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: 1.2.14
|
|
text: "Ensure that the admission control plugin ServiceAccount is set (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | 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 pod specification 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: 1.2.15
|
|
text: "Ensure that the admission control plugin NamespaceLifecycle is set (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | 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 pod specification file $apiserverconf
|
|
on the control plane node and set the --disable-admission-plugins parameter to
|
|
ensure it does not include NamespaceLifecycle.
|
|
scored: true
|
|
|
|
- id: 1.2.16
|
|
text: "Ensure that the admission control plugin NodeRestriction is set (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'enable-admission-plugins'"
|
|
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 pod specification 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: 1.2.17
|
|
text: "Ensure that the --secure-port argument is not set to 0 (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'secure-port'"
|
|
tests:
|
|
bin_op: or
|
|
test_items:
|
|
- flag: "--secure-port"
|
|
compare:
|
|
op: gt
|
|
value: 0
|
|
- flag: "--secure-port"
|
|
set: false
|
|
remediation: |
|
|
Edit the API server pod specification 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: 1.2.18
|
|
text: "Ensure that the --profiling argument is set to false (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'profiling'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--profiling"
|
|
compare:
|
|
op: eq
|
|
value: false
|
|
remediation: |
|
|
Edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the below parameter.
|
|
--profiling=false
|
|
scored: true
|
|
|
|
- id: 1.2.19
|
|
text: "Ensure that the --audit-log-path argument is set (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep"
|
|
type: "skip"
|
|
tests:
|
|
test_items:
|
|
- flag: "--audit-log-path"
|
|
remediation: |
|
|
Edit the API server pod specification 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, for example,
|
|
--audit-log-path=/var/log/apiserver/audit.log
|
|
scored: true
|
|
|
|
- id: 1.2.20
|
|
text: "Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep"
|
|
type: "skip"
|
|
tests:
|
|
test_items:
|
|
- flag: "--audit-log-maxage"
|
|
compare:
|
|
op: gte
|
|
value: 30
|
|
remediation: |
|
|
Edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the --audit-log-maxage parameter to 30
|
|
or as an appropriate number of days, for example,
|
|
--audit-log-maxage=30
|
|
scored: true
|
|
|
|
- id: 1.2.21
|
|
text: "Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep"
|
|
type: "skip"
|
|
tests:
|
|
test_items:
|
|
- flag: "--audit-log-maxbackup"
|
|
compare:
|
|
op: gte
|
|
value: 10
|
|
remediation: |
|
|
Edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the --audit-log-maxbackup parameter to 10 or to an appropriate
|
|
value. For example,
|
|
--audit-log-maxbackup=10
|
|
scored: true
|
|
|
|
- id: 1.2.22
|
|
text: "Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep"
|
|
type: "skip"
|
|
tests:
|
|
test_items:
|
|
- flag: "--audit-log-maxsize"
|
|
compare:
|
|
op: gte
|
|
value: 100
|
|
remediation: |
|
|
Edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the --audit-log-maxsize parameter to an appropriate size in MB.
|
|
For example, to set it as 100 MB, --audit-log-maxsize=100
|
|
scored: true
|
|
|
|
- id: 1.2.23
|
|
text: "Ensure that the --request-timeout argument is set as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep"
|
|
type: "skip"
|
|
tests:
|
|
test_items:
|
|
- flag: "--request-timeout"
|
|
remediation: |
|
|
Edit the API server pod specification file $apiserverconf
|
|
and set the below parameter as appropriate and if needed.
|
|
For example, --request-timeout=300s
|
|
scored: true
|
|
|
|
- id: 1.2.24
|
|
text: "Ensure that the --service-account-lookup argument is set to true (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | 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 pod specification file $apiserverconf
|
|
on the control plane node and set the below parameter.
|
|
--service-account-lookup=true
|
|
Alternatively, you can delete the --service-account-lookup parameter from this file so
|
|
that the default takes effect.
|
|
scored: true
|
|
|
|
- id: 1.2.25
|
|
text: "Ensure that the --service-account-key-file argument is set as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep -v grep"
|
|
type: "skip"
|
|
tests:
|
|
test_items:
|
|
- flag: "--service-account-key-file"
|
|
remediation: |
|
|
Edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the --service-account-key-file parameter
|
|
to the public key file for service accounts. For example,
|
|
--service-account-key-file=<filename>
|
|
scored: true
|
|
|
|
- id: 1.2.26
|
|
text: "Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep -m1 'Running kube-apiserver'"
|
|
tests:
|
|
bin_op: and
|
|
test_items:
|
|
- flag: "--etcd-certfile"
|
|
set: true
|
|
- flag: "--etcd-keyfile"
|
|
set: true
|
|
remediation: |
|
|
Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd.
|
|
Then, edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the etcd certificate and key file parameters.
|
|
--etcd-certfile=<path/to/client-certificate-file>
|
|
--etcd-keyfile=<path/to/client-key-file>
|
|
scored: true
|
|
|
|
- id: 1.2.27
|
|
text: "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep -A1 'Running kube-apiserver' | tail -n2"
|
|
tests:
|
|
bin_op: and
|
|
test_items:
|
|
- flag: "--tls-cert-file"
|
|
set: true
|
|
- flag: "--tls-private-key-file"
|
|
set: true
|
|
remediation: |
|
|
Follow the Kubernetes documentation and set up the TLS connection on the apiserver.
|
|
Then, edit the API server pod specification 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: 1.2.28
|
|
text: "Ensure that the --client-ca-file argument is set as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'client-ca-file'"
|
|
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 pod specification 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: 1.2.29
|
|
text: "Ensure that the --etcd-cafile argument is set as appropriate (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'etcd-cafile'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--etcd-cafile"
|
|
remediation: |
|
|
Follow the Kubernetes documentation and set up the TLS connection between the apiserver and etcd.
|
|
Then, edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the etcd certificate authority file parameter.
|
|
--etcd-cafile=<path/to/ca-file>
|
|
scored: true
|
|
|
|
- id: 1.2.30
|
|
text: "Ensure that the --encryption-provider-config argument is set as appropriate (Manual)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'encryption-provider-config'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--encryption-provider-config"
|
|
remediation: |
|
|
Follow the Kubernetes documentation and configure a EncryptionConfig file.
|
|
Then, edit the API server pod specification file $apiserverconf
|
|
on the control plane node and set the --encryption-provider-config parameter to the path of that file.
|
|
For example, --encryption-provider-config=</path/to/EncryptionConfig/File>
|
|
scored: false
|
|
|
|
- id: 1.2.31
|
|
text: "Ensure that encryption providers are appropriately configured (Manual)"
|
|
audit: "grep aescbc /path/to/encryption-config.json"
|
|
type: "manual"
|
|
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: 1.2.32
|
|
text: "Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-apiserver' | tail -n1 | grep 'tls-cipher-suites'"
|
|
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 pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml
|
|
on the control plane node and set the below parameter.
|
|
--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: "journalctl -m -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'terminated-pod-gc-threshold'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--terminated-pod-gc-threshold"
|
|
remediation: |
|
|
Edit the Controller Manager pod specification file $controllermanagerconf
|
|
on the control plane node and set the --terminated-pod-gc-threshold to an appropriate threshold,
|
|
for example, --terminated-pod-gc-threshold=10
|
|
scored: false
|
|
|
|
- id: 1.3.2
|
|
text: "Ensure that the --profiling argument is set to false (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'profiling'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--profiling"
|
|
compare:
|
|
op: eq
|
|
value: false
|
|
remediation: |
|
|
Edit the Controller Manager pod specification file $controllermanagerconf
|
|
on the control plane node and set the below parameter.
|
|
--profiling=false
|
|
scored: true
|
|
|
|
- id: 1.3.3
|
|
text: "Ensure that the --use-service-account-credentials argument is set to true (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'use-service-account-credentials'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--use-service-account-credentials"
|
|
compare:
|
|
op: noteq
|
|
value: false
|
|
remediation: |
|
|
Edit the Controller Manager pod specification file $controllermanagerconf
|
|
on the control plane node to set the below parameter.
|
|
--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: "journalctl -m -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'service-account-private-key-file'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--service-account-private-key-file"
|
|
remediation: |
|
|
Edit the Controller Manager pod specification 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: "journalctl -m -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'root-ca-file'"
|
|
tests:
|
|
test_items:
|
|
- flag: "--root-ca-file"
|
|
remediation: |
|
|
Edit the Controller Manager pod specification 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: "journalctl -m -u k3s | grep 'Running kube-controller-manager' | tail -n1 | grep 'RotateKubeletServerCertificate'"
|
|
type: "skip"
|
|
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 pod specification 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:
|
|
bin_op: or
|
|
test_items:
|
|
- flag: "--bind-address"
|
|
compare:
|
|
op: eq
|
|
value: "127.0.0.1"
|
|
set: true
|
|
- flag: "--bind-address"
|
|
set: false
|
|
remediation: |
|
|
Edit the Controller Manager pod specification file $controllermanagerconf
|
|
on the control plane node and ensure the correct value for the --bind-address parameter
|
|
scored: true
|
|
|
|
- id: 1.4
|
|
text: "Scheduler"
|
|
checks:
|
|
- id: 1.4.1
|
|
text: "Ensure that the --profiling argument is set to false (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-scheduler' | tail -n1"
|
|
tests:
|
|
test_items:
|
|
- flag: "--profiling"
|
|
compare:
|
|
op: eq
|
|
value: false
|
|
set: true
|
|
remediation: |
|
|
Edit the Scheduler pod specification file $schedulerconf file
|
|
on the control plane node and set the below parameter.
|
|
--profiling=false
|
|
scored: true
|
|
|
|
- id: 1.4.2
|
|
text: "Ensure that the --bind-address argument is set to 127.0.0.1 (Automated)"
|
|
audit: "journalctl -m -u k3s | grep 'Running kube-scheduler' | tail -n1 | grep 'bind-address'"
|
|
tests:
|
|
bin_op: or
|
|
test_items:
|
|
- flag: "--bind-address"
|
|
compare:
|
|
op: eq
|
|
value: "127.0.0.1"
|
|
set: true
|
|
- flag: "--bind-address"
|
|
set: false
|
|
remediation: |
|
|
Edit the Scheduler pod specification file $schedulerconf
|
|
on the control plane node and ensure the correct value for the --bind-address parameter
|
|
scored: true
|