mirror of
https://github.com/aquasecurity/kube-bench.git
synced 2024-12-24 07:28:06 +00:00
a7aa21f32c
* Changes for 1.5 * Update cis-1.3 through 1.6 to also work with configmaps. * Switch on if proxykubeconfig is set, instead of setting a variable in the script. * permissons -> proxykubeconfig for 2.2.5/4.1.3 to keep these tests locked with 2.2.6/4.1.4 * Updating test output? Maybe? * Copy integration test output files into docker image? * Make entrypoint move integration folder to host, print 1.5 node info. * Change the order of tests in travis to load files before testing. * Return tests to place Those tests comes first since there is more likely to fail with them and then the test will fail "faster" which will save time * Remove copy integration When running in a container we don't need to test, only when build and running in Travis to make sure everything is working fine. * Add $ mark before proxykubeconfig If not having $ before the parameter then it won't get substituted * Add $ mark before proxykubeconfig If not having $ before the parameter then it won't get substituted * Remove test relate lines We don't test while running, only integration testing when building and unit testing * Add spaces * Change 4.1.3 4.1.4 Those tests now should pass. * Change tests 4.1.3 and 4.1.4 Those tests now should PASS * Update job.data with more accurate counts. Thanks to @yoavrotems for getting the project this far! * Thanks for linting, yamllint! Co-authored-by: Yoav Rotem <yoavrotems97@gmail.com>
485 lines
20 KiB
YAML
485 lines
20 KiB
YAML
---
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controls:
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version: 1.5
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id: 4
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text: "Worker Node Security Configuration"
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type: "node"
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groups:
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- id: 4.1
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text: "Worker Node Configuration Files"
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checks:
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- id: 4.1.1
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text: "Ensure that the kubelet service file permissions are set to 644 or more restrictive (Scored)"
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audit: '/bin/sh -c ''if test -e $kubeletsvc; then stat -c permissions=%a $kubeletsvc; fi'' '
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tests:
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test_items:
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- flag: "permissions"
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set: true
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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 each worker node.
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For example,
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chmod 644 $kubeletsvc
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scored: true
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- id: 4.1.2
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text: "Ensure that the kubelet service file ownership is set to root:root (Scored)"
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audit: '/bin/sh -c ''if test -e $kubeletsvc; then stat -c %U:%G $kubeletsvc; fi'' '
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tests:
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test_items:
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- flag: 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 each worker node.
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For example,
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chown root:root $kubeletsvc
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scored: true
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- id: 4.1.3
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text: "Ensure that the proxy kubeconfig file permissions are set to 644 or more restrictive (Scored)"
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audit: '/bin/sh -c ''if test -e $proxykubeconfig; then stat -c permissions=%a $proxykubeconfig; fi'' '
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tests:
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bin_op: or
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test_items:
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- flag: "permissions"
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set: true
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compare:
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op: bitmask
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value: "644"
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- flag: "$proxykubeconfig"
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set: false
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remediation: |
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Run the below command (based on the file location on your system) on the each worker node.
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For example,
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chmod 644 $proxykubeconfig
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scored: true
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- id: 4.1.4
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text: "Ensure that the proxy kubeconfig file ownership is set to root:root (Scored)"
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audit: '/bin/sh -c ''if test -e $proxykubeconfig; then stat -c %U:%G $proxykubeconfig; fi'' '
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tests:
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bin_op: or
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test_items:
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- flag: root:root
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set: true
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- flag: "$proxykubeconfig"
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set: false
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remediation: |
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Run the below command (based on the file location on your system) on the each worker node.
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For example, chown root:root $proxykubeconfig
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scored: true
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- id: 4.1.5
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text: "Ensure that the kubelet.conf file permissions are set to 644 or more restrictive (Scored)"
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audit: '/bin/sh -c ''if test -e $kubeletkubeconfig; then stat -c permissions=%a $kubeletkubeconfig; fi'' '
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tests:
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test_items:
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- flag: "permissions"
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set: true
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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 each worker node.
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For example,
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chmod 644 $kubeletkubeconfig
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scored: true
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- id: 4.1.6
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text: "Ensure that the kubelet.conf file ownership is set to root:root (Scored)"
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audit: '/bin/sh -c ''if test -e $kubeletkubeconfig; then stat -c %U:%G $kubeletkubeconfig; fi'' '
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tests:
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test_items:
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- flag: root:root
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set: true
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compare:
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op: eq
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value: 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 each worker node.
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For example,
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chown root:root $kubeletkubeconfig
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scored: true
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- id: 4.1.7
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text: "Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Scored)"
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audit: |
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CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}')
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if test -z $CAFILE; then CAFILE=$kubeletcafile; fi
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if test -e $CAFILE; then stat -c permissions=%a $CAFILE; fi
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tests:
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test_items:
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- flag: "permissions"
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set: true
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compare:
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op: bitmask
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value: "644"
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remediation: |
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Run the following command to modify the file permissions of the
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--client-ca-file chmod 644 <filename>
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scored: true
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- id: 4.1.8
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text: "Ensure that the client certificate authorities file ownership is set to root:root (Scored)"
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audit: |
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CAFILE=$(ps -ef | grep kubelet | grep -v apiserver | grep -- --client-ca-file= | awk -F '--client-ca-file=' '{print $2}' | awk '{print $1}')
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if test -z $CAFILE; then CAFILE=$kubeletcafile; fi
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if test -e $CAFILE; then stat -c %U:%G $CAFILE; fi
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tests:
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test_items:
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- flag: root:root
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set: true
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compare:
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op: eq
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value: root:root
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remediation: |
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Run the following command to modify the ownership of the --client-ca-file.
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chown root:root <filename>
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scored: true
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- id: 4.1.9
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text: "Ensure that the kubelet configuration file has permissions set to 644 or more restrictive (Scored)"
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audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c permissions=%a $kubeletconf; fi'' '
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tests:
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test_items:
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- flag: "permissions"
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set: true
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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 following command (using the config file location identified in the Audit step)
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chmod 644 $kubeletconf
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scored: true
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- id: 4.1.10
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text: "Ensure that the kubelet configuration file ownership is set to root:root (Scored)"
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audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c %U:%G $kubeletconf; fi'' '
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tests:
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test_items:
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- flag: root:root
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set: true
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remediation: |
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Run the following command (using the config file location identified in the Audit step)
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chown root:root $kubeletconf
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scored: true
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- id: 4.2
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text: "Kubelet"
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checks:
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- id: 4.2.1
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text: "Ensure that the anonymous-auth argument is set to false (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: "--anonymous-auth"
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path: '{.authentication.anonymous.enabled}'
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set: true
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compare:
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op: eq
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value: false
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remediation: |
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If using a Kubelet config file, edit the file to set authentication: anonymous: enabled to
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false.
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If using executable arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
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--anonymous-auth=false
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.2
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text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: --authorization-mode
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path: '{.authorization.mode}'
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set: true
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compare:
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op: nothave
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value: AlwaysAllow
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remediation: |
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If using a Kubelet config file, edit the file to set authorization: mode to Webhook. If
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using executable arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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set the below parameter in KUBELET_AUTHZ_ARGS variable.
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--authorization-mode=Webhook
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.3
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text: "Ensure that the --client-ca-file argument is set as appropriate (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: --client-ca-file
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path: '{.authentication.x509.clientCAFile}'
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set: true
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remediation: |
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If using a Kubelet config file, edit the file to set authentication: x509: clientCAFile to
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the location of the client CA file.
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If using command line arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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set the below parameter in KUBELET_AUTHZ_ARGS variable.
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--client-ca-file=<path/to/client-ca-file>
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.4
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text: "Ensure that the --read-only-port argument is set to 0 (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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bin_op: or
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test_items:
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- flag: "--read-only-port"
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path: '{.readOnlyPort}'
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set: true
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compare:
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op: eq
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value: 0
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- flag: "--read-only-port"
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path: '{.readOnlyPort}'
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set: false
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remediation: |
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If using a Kubelet config file, edit the file to set readOnlyPort to 0.
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If using command line arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
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--read-only-port=0
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.5
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text: "Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: --streaming-connection-idle-timeout
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path: '{.streamingConnectionIdleTimeout}'
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set: true
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compare:
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op: noteq
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value: 0
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- flag: --streaming-connection-idle-timeout
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path: '{.streamingConnectionIdleTimeout}'
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set: false
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bin_op: or
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remediation: |
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If using a Kubelet config file, edit the file to set streamingConnectionIdleTimeout to a
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value other than 0.
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If using command line arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
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--streaming-connection-idle-timeout=5m
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.6
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text: "Ensure that the --protect-kernel-defaults argument is set to true (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: --protect-kernel-defaults
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path: '{.protectKernelDefaults}'
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set: true
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compare:
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op: eq
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value: true
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remediation: |
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If using a Kubelet config file, edit the file to set protectKernelDefaults: true.
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If using command line arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
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--protect-kernel-defaults=true
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.7
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text: "Ensure that the --make-iptables-util-chains argument is set to true (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: --make-iptables-util-chains
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path: '{.makeIPTablesUtilChains}'
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set: true
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compare:
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op: eq
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value: true
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- flag: --make-iptables-util-chains
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path: '{.makeIPTablesUtilChains}'
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set: false
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bin_op: or
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remediation: |
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If using a Kubelet config file, edit the file to set makeIPTablesUtilChains: true.
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If using command line arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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remove the --make-iptables-util-chains argument from the
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KUBELET_SYSTEM_PODS_ARGS variable.
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.8
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text: "Ensure that the --hostname-override argument is not set (Not Scored)"
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# This is one of those properties that can only be set as a command line argument.
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# To check if the property is set as expected, we need to parse the kubelet command
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# instead reading the Kubelet Configuration file.
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audit: "/bin/ps -fC $kubeletbin "
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tests:
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test_items:
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- flag: --hostname-override
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set: false
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remediation: |
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Edit the kubelet service file $kubeletsvc
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on each worker node and remove the --hostname-override argument from the
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KUBELET_SYSTEM_PODS_ARGS variable.
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: false
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- id: 4.2.9
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text: "Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Not Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: --event-qps
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path: '{.eventRecordQPS}'
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set: true
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compare:
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op: eq
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value: 0
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remediation: |
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If using a Kubelet config file, edit the file to set eventRecordQPS: to an appropriate level.
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If using command line arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: false
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- id: 4.2.10
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text: "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: --tls-cert-file
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path: '{.tlsCertFile}'
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set: true
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- flag: --tls-private-key-file
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path: '{.tlsPrivateKeyFile}'
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set: true
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remediation: |
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If using a Kubelet config file, edit the file to set tlsCertFile to the location
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of the certificate file to use to identify this Kubelet, and tlsPrivateKeyFile
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to the location of the corresponding private key file.
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If using command line arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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set the below parameters in KUBELET_CERTIFICATE_ARGS variable.
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--tls-cert-file=<path/to/tls-certificate-file>
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--tls-private-key-file=<path/to/tls-key-file>
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.11
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text: "Ensure that the --rotate-certificates argument is not set to false (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: --rotate-certificates
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path: '{.rotateCertificates}'
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set: true
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compare:
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op: eq
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value: true
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- flag: --rotate-certificates
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path: '{.rotateCertificates}'
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set: false
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bin_op: or
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remediation: |
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If using a Kubelet config file, edit the file to add the line rotateCertificates: true or
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remove it altogether to use the default value.
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If using command line arguments, edit the kubelet service file
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$kubeletsvc on each worker node and
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remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS
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variable.
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Based on your system, restart the kubelet service. For example:
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systemctl daemon-reload
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systemctl restart kubelet.service
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scored: true
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- id: 4.2.12
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text: "Ensure that the RotateKubeletServerCertificate argument is set to true (Scored)"
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audit: "/bin/ps -fC $kubeletbin"
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audit_config: "/bin/cat $kubeletconf"
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tests:
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test_items:
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- flag: RotateKubeletServerCertificate
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path: '{.featureGates.RotateKubeletServerCertificate}'
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set: true
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compare:
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op: eq
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value: true
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remediation: |
|
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Edit the kubelet service file $kubeletsvc
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on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable.
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|
--feature-gates=RotateKubeletServerCertificate=true
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|
Based on your system, restart the kubelet service. For example:
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|
systemctl daemon-reload
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|
systemctl restart kubelet.service
|
|
scored: true
|
|
|
|
- id: 4.2.13
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|
text: "Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers (Not Scored)"
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|
audit: "/bin/ps -fC $kubeletbin"
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|
audit_config: "/bin/cat $kubeletconf"
|
|
tests:
|
|
test_items:
|
|
- flag: --tls-cipher-suites
|
|
path: '{range .tlsCipherSuites[:]}{}{'',''}{end}'
|
|
set: true
|
|
compare:
|
|
op: valid_elements
|
|
value: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256
|
|
remediation: |
|
|
If using a Kubelet config file, edit the file to set TLSCipherSuites: to
|
|
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256
|
|
or to a subset of these values.
|
|
If using executable arguments, edit the kubelet service file
|
|
$kubeletsvc on each worker node and
|
|
set the --tls-cipher-suites parameter as follows, or to a subset of these values.
|
|
--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256
|
|
Based on your system, restart the kubelet service. For example:
|
|
systemctl daemon-reload
|
|
systemctl restart kubelet.service
|
|
scored: false
|