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120 lines
4.5 KiB
120 lines
4.5 KiB
---
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controls:
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version: "cis-1.6-k3s"
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id: 2
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text: "Etcd Node Configuration"
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type: "etcd"
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groups:
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- id: 2
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text: "Etcd Node Configuration Files"
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checks:
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- id: 2.1
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text: "Ensure that the --cert-file and --key-file arguments are set as appropriate if use etcd as database (Automated)"
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audit: grep -A 4 'client-transport-security' $etcdconf | grep -E 'cert-file|key-file'
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tests:
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bin_op: and
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test_items:
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- flag: "cert-file"
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- flag: "key-file"
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remediation: |
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By default, K3s uses a config file for etcd that can be found at $etcdconf.
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The config file contains client-transport-security: which has fields that have the peer cert and peer key files. No manual remediation needed.
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scored: true
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- id: 2.2
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text: "Ensure that the --client-cert-auth argument is set to true (Automated)"
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audit: grep 'client-cert-auth' $etcdconf
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tests:
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test_items:
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- flag: "client-cert-auth"
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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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By default, K3s uses a config file for etcd that can be found at $etcdconf.
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client-cert-auth is set to true. No manual remediation needed.
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scored: true
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- id: 2.3
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text: "Ensure that the --auto-tls argument is not set to true (Automated)"
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audit: grep 'auto-tls' $etcdconf | cat
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tests:
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bin_op: or
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test_items:
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- flag: "auto-tls"
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set: false
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- flag: "auto-tls"
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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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By default, K3s starts Etcd without this flag. It is set to false by default.
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scored: true
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- id: 2.4
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text: "Ensure that the --peer-cert-file and --peer-key-file arguments are
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set as appropriate (Automated)"
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audit: grep -A 4 'peer-transport-security' $etcdconf | grep -E 'cert-file|key-file'
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tests:
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bin_op: and
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test_items:
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- flag: "cert-file"
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- flag: "key-file"
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remediation: |
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By default, K3s starts Etcd with a config file found here, $etcdconf.
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The config file contains peer-transport-security: which has fields that have the peer cert and peer key files.
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scored: true
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- id: 2.5
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text: "Ensure that the --peer-client-cert-auth argument is set to true (Automated)"
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audit: grep -A 4 'peer-transport-security' $etcdconf | grep 'client-cert-auth'
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tests:
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test_items:
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- flag: "client-cert-auth"
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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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By default, K3s uses a config file for etcd that can be found at $etcdconf.
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The config file contains peer-transport-security: which has client-cert-auth set to true. No manual remediation needed.
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scored: true
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- id: 2.6
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text: "Ensure that the --peer-auto-tls argument is not set to true (Automated)"
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audit: grep 'peer-auto-tls' $etcdconf | cat
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tests:
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bin_op: or
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test_items:
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- flag: "peer-auto-tls"
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set: false
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- flag: "peer-auto-tls"
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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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By default, K3s uses a config file for etcd that can be found at $etcdconf.
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Within the file, it does not contain the peer-auto-tls field. No manual remediation needed.
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scored: true
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- id: 2.7
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text: "Ensure that a unique Certificate Authority is used for etcd (Manual)"
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audit: |
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if [ -f "$etcdconf" ];then
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etcd_ca=$(grep 'trusted-ca-file' $etcdconf | awk -F ":|: *" '{print $NF}');
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apiserver_ca=$(journalctl -u k3s | grep "Running kube-apiserver" | tail -n1 | grep "trusted-ca-file" | awk -F "=" '{print $NF}')
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if [ "$etcd_ca" == "$apiserver_ca" ]; then
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echo 'etcd_and_apiserver_have_same_ca';
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else
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echo 'etcd_and_apiserver_ca_not_same1' ;
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fi
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else
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echo 'etcd_and_apiserver_ca_not_same'; return ;
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fi
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tests:
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test_items:
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- flag: "etcd_and_apiserver_ca_not_same"
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remediation: |
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By default, K3s uses a config file for etcd that can be found at $etcdconf
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and the trusted-ca-file parameters in it are set to unique values specific to etcd. No manual remediation needed.
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scored: false
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