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---
controls :
version : "cis-1.9"
id : 1
text : "Control Plane Security Configuration"
type : "master"
groups :
- id : 1.1
text : "Control Plane Node Configuration Files"
checks :
- id : 1.1 .1
text : "Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated)"
audit : "/bin/sh -c 'if test -e $apiserverconf; then stat -c permissions=%a $apiserverconf; fi'"
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the
control plane node.
For example, chmod 600 $apiserverconf
scored : true
- id : 1.1 .2
text : "Ensure that the API server pod specification file ownership is set to root:root (Automated)"
audit : "/bin/sh -c 'if test -e $apiserverconf; then stat -c %U:%G $apiserverconf; fi'"
tests :
test_items :
- flag : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example, chown root:root $apiserverconf
scored : true
- id : 1.1 .3
text : "Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated)"
audit : "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c permissions=%a $controllermanagerconf; fi'"
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example, chmod 600 $controllermanagerconf
scored : true
- id : 1.1 .4
text : "Ensure that the controller manager pod specification file ownership is set to root:root (Automated)"
audit : "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c %U:%G $controllermanagerconf; fi'"
tests :
test_items :
- flag : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example, chown root:root $controllermanagerconf
scored : true
- id : 1.1 .5
text : "Ensure that the scheduler pod specification file permissions are set to 600 or more restrictive (Automated)"
audit : "/bin/sh -c 'if test -e $schedulerconf; then stat -c permissions=%a $schedulerconf; fi'"
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example, chmod 600 $schedulerconf
scored : true
- id : 1.1 .6
text : "Ensure that the scheduler pod specification file ownership is set to root:root (Automated)"
audit : "/bin/sh -c 'if test -e $schedulerconf; then stat -c %U:%G $schedulerconf; fi'"
tests :
test_items :
- flag : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example, chown root:root $schedulerconf
scored : true
- id : 1.1 .7
text : "Ensure that the etcd pod specification file permissions are set to 600 or more restrictive (Automated)"
audit : "/bin/sh -c 'if test -e $etcdconf; then find $etcdconf -name '*etcd*' | xargs stat -c permissions=%a; fi'"
use_multiple_values : true
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chmod 600 $etcdconf
scored : true
- id : 1.1 .8
text : "Ensure that the etcd pod specification file ownership is set to root:root (Automated)"
audit : "/bin/sh -c 'if test -e $etcdconf; then find $etcdconf -name '*etcd*' | xargs stat -c %U:%G; fi'"
use_multiple_values : true
tests :
test_items :
- flag : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chown root:root $etcdconf
scored : true
- id : 1.1 .9
text : "Ensure that the Container Network Interface file permissions are set to 600 or more restrictive (Manual)"
audit : |
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
find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c permissions=%a
use_multiple_values : true
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example, chmod 600 <path/to/cni/files>
scored : false
- id : 1.1 .10
text : "Ensure that the Container Network Interface file ownership is set to root:root (Manual)"
audit : |
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
find /var/lib/cni/networks -type f 2> /dev/null | xargs --no-run-if-empty stat -c %U:%G
use_multiple_values : true
tests :
test_items :
- flag : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chown root:root <path/to/cni/files>
scored : false
- id : 1.1 .11
text : "Ensure that the etcd data directory permissions are set to 700 or more restrictive (Automated)"
audit : |
DATA_DIR=''
for d in $(ps -ef | grep $etcdbin | grep -- --data-dir | sed 's%.*data-dir[= ]\([^ ]*\).*%\1%'); do
if test -d "$d"; then DATA_DIR="$d"; fi
done
if ! test -d "$DATA_DIR"; then DATA_DIR=$etcddatadir; fi
stat -c permissions=%a "$DATA_DIR"
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "700"
remediation : |
On the etcd server node, get the etcd data directory, passed as an argument --data-dir,
from the command 'ps -ef | grep etcd'.
Run the below command (based on the etcd data directory found above). For example,
chmod 700 /var/lib/etcd
scored : true
- id : 1.1 .12
text : "Ensure that the etcd data directory ownership is set to etcd:etcd (Automated)"
audit : |
DATA_DIR=''
for d in $(ps -ef | grep $etcdbin | grep -- --data-dir | sed 's%.*data-dir[= ]\([^ ]*\).*%\1%'); do
if test -d "$d"; then DATA_DIR="$d"; fi
done
if ! test -d "$DATA_DIR"; then DATA_DIR=$etcddatadir; fi
stat -c %U:%G "$DATA_DIR"
tests :
test_items :
- flag : "etcd:etcd"
remediation : |
On the etcd server node, get the etcd data directory, passed as an argument --data-dir,
from the command 'ps -ef | grep etcd'.
Run the below command (based on the etcd data directory found above).
For example, chown etcd:etcd /var/lib/etcd
scored : true
- id : 1.1 .13
text : "Ensure that the default administrative credential file permissions are set to 600 (Automated)"
audit : |
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for adminconf in /etc/kubernetes/admin.conf /etc/kubernetes/super-admin.conf; do if test -e $adminconf; then stat -c "permissions=%a %n" $adminconf; fi; done
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use_multiple_values : true
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example, chmod 600 /etc/kubernetes/admin.conf
On Kubernetes 1.29+ the super-admin.conf file should also be modified, if present.
For example, chmod 600 /etc/kubernetes/super-admin.conf
scored : true
- id : 1.1 .14
text : "Ensure that the default administrative credential file ownership is set to root:root (Automated)"
audit : |
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for adminconf in /etc/kubernetes/admin.conf /etc/kubernetes/super-admin.conf; do if test -e $adminconf; then stat -c "ownership=%U:%G %n" $adminconf; fi; done
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use_multiple_values : true
tests :
test_items :
- flag : "ownership"
compare :
op : eq
value : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example, chown root:root /etc/kubernetes/admin.conf
On Kubernetes 1.29+ the super-admin.conf file should also be modified, if present.
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For example, chown root:root /etc/kubernetes/super-admin.conf
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scored : true
- id : 1.1 .15
text : "Ensure that the scheduler.conf file permissions are set to 600 or more restrictive (Automated)"
audit : "/bin/sh -c 'if test -e $schedulerkubeconfig; then stat -c permissions=%a $schedulerkubeconfig; fi'"
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chmod 600 $schedulerkubeconfig
scored : true
- id : 1.1 .16
text : "Ensure that the scheduler.conf file ownership is set to root:root (Automated)"
audit : "/bin/sh -c 'if test -e $schedulerkubeconfig; then stat -c %U:%G $schedulerkubeconfig; fi'"
tests :
test_items :
- flag : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chown root:root $schedulerkubeconfig
scored : true
- id : 1.1 .17
text : "Ensure that the controller-manager.conf file permissions are set to 600 or more restrictive (Automated)"
audit : "/bin/sh -c 'if test -e $controllermanagerkubeconfig; then stat -c permissions=%a $controllermanagerkubeconfig; fi'"
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chmod 600 $controllermanagerkubeconfig
scored : true
- id : 1.1 .18
text : "Ensure that the controller-manager.conf file ownership is set to root:root (Automated)"
audit : "/bin/sh -c 'if test -e $controllermanagerkubeconfig; then stat -c %U:%G $controllermanagerkubeconfig; fi'"
tests :
test_items :
- flag : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chown root:root $controllermanagerkubeconfig
scored : true
- id : 1.1 .19
text : "Ensure that the Kubernetes PKI directory and file ownership is set to root:root (Automated)"
audit : "find /etc/kubernetes/pki/ | xargs stat -c %U:%G"
use_multiple_values : true
tests :
test_items :
- flag : "root:root"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chown -R root:root /etc/kubernetes/pki/
scored : true
- id : 1.1 .20
text : "Ensure that the Kubernetes PKI certificate file permissions are set to 600 or more restrictive (Manual)"
audit : "find /etc/kubernetes/pki/ -name '*.crt' | xargs stat -c permissions=%a"
use_multiple_values : true
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chmod -R 600 /etc/kubernetes/pki/*.crt
scored : false
- id : 1.1 .21
text : "Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual)"
audit : "find /etc/kubernetes/pki/ -name '*.key' | xargs stat -c permissions=%a"
use_multiple_values : true
tests :
test_items :
- flag : "permissions"
compare :
op : bitmask
value : "600"
remediation : |
Run the below command (based on the file location on your system) on the control plane node.
For example,
chmod -R 600 /etc/kubernetes/pki/*.key
scored : false
- id : 1.2
text : "API Server"
checks :
- id : 1.2 .1
text : "Ensure that the --anonymous-auth argument is set to false (Manual)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--anonymous-auth"
compare :
op : eq
value : false
remediation : |
Edit the API server pod specification file $apiserverconf
on the control plane node and set the below parameter.
--anonymous-auth=false
scored : false
- id : 1.2 .2
text : "Ensure that the --token-auth-file parameter is not set (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--token-auth-file"
set : false
remediation : |
Follow the documentation and configure alternate mechanisms for authentication. Then,
edit the API server pod specification file $apiserverconf
on the control plane node and remove the --token-auth-file=<filename> parameter.
scored : true
- id : 1.2 .3
text : "Ensure that the --DenyServiceExternalIPs is set (Manual)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--enable-admission-plugins"
compare :
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op : has
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value : "DenyServiceExternalIPs"
remediation : |
Edit the API server pod specification file $apiserverconf
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on the control plane node and add the `DenyServiceExternalIPs` plugin
to the enabled admission plugins, as such --enable-admission-plugin=DenyServiceExternalIPs.
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scored : false
- id : 1.2 .4
text : "Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : and
test_items :
- flag : "--kubelet-client-certificate"
- flag : "--kubelet-client-key"
remediation : |
Follow the Kubernetes documentation and set up the TLS connection between the
apiserver and kubelets. Then, edit API server pod specification file
$apiserverconf on the control plane node and set the
kubelet client certificate and key parameters as below.
--kubelet-client-certificate=<path/to/client-certificate-file>
--kubelet-client-key=<path/to/client-key-file>
scored : true
- id : 1.2 .5
text : "Ensure that the --kubelet-certificate-authority argument is set as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--kubelet-certificate-authority"
remediation : |
Follow the Kubernetes documentation and setup the TLS connection between
the apiserver and kubelets. Then, edit the API server pod specification file
$apiserverconf on the control plane node and set the
--kubelet-certificate-authority parameter to the path to the cert file for the certificate authority.
--kubelet-certificate-authority=<ca-string>
scored : true
- id : 1.2 .6
text : "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--authorization-mode"
compare :
op : nothave
value : "AlwaysAllow"
remediation : |
Edit the API server 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 .7
text : "Ensure that the --authorization-mode argument includes Node (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--authorization-mode"
compare :
op : has
value : "Node"
remediation : |
Edit the API server 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 .8
text : "Ensure that the --authorization-mode argument includes RBAC (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--authorization-mode"
compare :
op : has
value : "RBAC"
remediation : |
Edit the API server 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 .9
text : "Ensure that the admission control plugin EventRateLimit is set (Manual)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "EventRateLimit"
remediation : |
Follow the Kubernetes documentation and set the desired limits in a configuration file.
Then, edit the API server 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 .10
text : "Ensure that the admission control plugin AlwaysAdmit is not set (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--enable-admission-plugins"
compare :
op : nothave
value : AlwaysAdmit
- flag : "--enable-admission-plugins"
set : false
remediation : |
Edit the API server 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 .11
text : "Ensure that the admission control plugin AlwaysPullImages is set (Manual)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "AlwaysPullImages"
remediation : |
Edit the API server 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 .12
text : "Ensure that the admission control plugin ServiceAccount is set (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--disable-admission-plugins"
compare :
op : nothave
value : "ServiceAccount"
- flag : "--disable-admission-plugins"
set : false
remediation : |
Follow the documentation and create ServiceAccount objects as per your environment.
Then, edit the API server 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 .13
text : "Ensure that the admission control plugin NamespaceLifecycle is set (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--disable-admission-plugins"
compare :
op : nothave
value : "NamespaceLifecycle"
- flag : "--disable-admission-plugins"
set : false
remediation : |
Edit the API server 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 .14
text : "Ensure that the admission control plugin NodeRestriction is set (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "NodeRestriction"
remediation : |
Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets.
Then, edit the API server 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 .15
text : "Ensure that the --profiling argument is set to false (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--profiling"
compare :
op : eq
value : false
remediation : |
Edit the API server pod specification file $apiserverconf
on the control plane node and set the below parameter.
--profiling=false
scored : true
- id : 1.2 .16
text : "Ensure that the --audit-log-path argument is set (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--audit-log-path"
remediation : |
Edit the API server 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 .17
text : "Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--audit-log-maxage"
compare :
op : gte
value : 30
remediation : |
Edit the API server 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 .18
text : "Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--audit-log-maxbackup"
compare :
op : gte
value : 10
remediation : |
Edit the API server 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 .19
text : "Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--audit-log-maxsize"
compare :
op : gte
value : 100
remediation : |
Edit the API server 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 .20
text : "Ensure that the --request-timeout argument is set as appropriate (Manual)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
type : manual
remediation : |
Edit the API server pod specification file $apiserverconf
and set the below parameter as appropriate and if needed.
For example, --request-timeout=300s
scored : false
- id : 1.2 .21
text : "Ensure that the --service-account-lookup argument is set to true (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--service-account-lookup"
set : false
- flag : "--service-account-lookup"
compare :
op : eq
value : true
remediation : |
Edit the API server 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 .22
text : "Ensure that the --service-account-key-file argument is set as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--service-account-key-file"
remediation : |
Edit the API server 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 .23
text : "Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : and
test_items :
- flag : "--etcd-certfile"
- flag : "--etcd-keyfile"
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 .24
text : "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : and
test_items :
- flag : "--tls-cert-file"
- flag : "--tls-private-key-file"
remediation : |
Follow the Kubernetes documentation and set up the TLS connection on the apiserver.
Then, edit the API server 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 .25
text : "Ensure that the --client-ca-file argument is set as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--client-ca-file"
remediation : |
Follow the Kubernetes documentation and set up the TLS connection on the apiserver.
Then, edit the API server 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 .26
text : "Ensure that the --etcd-cafile argument is set as appropriate (Automated)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
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 .27
text : "Ensure that the --encryption-provider-config argument is set as appropriate (Manual)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--encryption-provider-config"
remediation : |
Follow the Kubernetes documentation and configure a EncryptionConfig file.
Then, edit the API server pod specification file $apiserverconf
on the control plane node and set the --encryption-provider-config parameter to the path of that file.
For example, --encryption-provider-config=</path/to/EncryptionConfig/File>
scored : false
- id : 1.2 .28
text : "Ensure that encryption providers are appropriately configured (Manual)"
audit : |
ENCRYPTION_PROVIDER_CONFIG=$(ps -ef | grep $apiserverbin | grep -- --encryption-provider-config | sed 's%.*encryption-provider-config[= ]\([^ ]*\).*%\1%')
if test -e $ENCRYPTION_PROVIDER_CONFIG; then grep -A1 'providers:' $ENCRYPTION_PROVIDER_CONFIG | tail -n1 | grep -o "[A-Za-z]*" | sed 's/^/provider=/'; fi
tests :
test_items :
- flag : "provider"
compare :
op : valid_elements
value : "aescbc,kms,secretbox"
remediation : |
Follow the Kubernetes documentation and configure a EncryptionConfig file.
In this file, choose aescbc, kms or secretbox as the encryption provider.
scored : false
- id : 1.2 .29
text : "Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Manual)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--tls-cipher-suites"
compare :
op : valid_elements
value : "TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384"
remediation : |
Edit the API server 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 : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
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 : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
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 : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
test_items :
- flag : "--use-service-account-credentials"
compare :
op : noteq
value : false
remediation : |
Edit the Controller Manager 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 : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
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 : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
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 : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--feature-gates"
compare :
op : nothave
value : "RotateKubeletServerCertificate=false"
set : true
- flag : "--feature-gates"
set : false
remediation : |
Edit the Controller Manager 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"
- 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 : "/bin/ps -ef | grep $schedulerbin | grep -v grep"
tests :
test_items :
- flag : "--profiling"
compare :
op : eq
value : false
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 : "/bin/ps -ef | grep $schedulerbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--bind-address"
compare :
op : eq
value : "127.0.0.1"
- 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
