2018-10-09 22:34:52 +00:00
---
controls :
version : 1.11
id : 1
text : "Master Node Security Configuration"
type : "master"
groups :
2020-01-06 09:18:25 +00:00
- id : 1.1
text : "API Server"
checks :
- id : 1.1 .1
text : "Ensure that the --anonymous-auth argument is set to false (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--anonymous-auth"
compare :
op : eq
value : false
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the below parameter.
--anonymous-auth=false
scored : true
- id : 1.1 .2
text : "Ensure that the --basic-auth-file argument is not set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--basic-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 master node and remove the --basic-auth-file=<filename>
parameter.
scored : true
- id : 1.1 .3
text : "Ensure that the --insecure-allow-any-token argument is not set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--insecure-allow-any-token"
set : false
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and remove the --insecure-allow-any-token
parameter.
scored : true
- id : 1.1 .4
text : "Ensure that the --kubelet-https argument is set to true (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--kubelet-https"
compare :
op : eq
value : true
set : true
- flag : "--kubelet-https"
set : false
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and remove the --kubelet-https parameter.
scored : true
- id : 1.1 .5
text : "Ensure that the --insecure-bind-address argument is not set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--insecure-bind-address"
set : false
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and remove the --insecure-bind-address
parameter.
scored : true
- id : 1.1 .6
text : "Ensure that the --insecure-port argument is set to 0 (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--insecure-port"
compare :
op : eq
value : 0
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
apiserver.yaml on the master node and set the below parameter.
--insecure-port=0
scored : true
- id : 1.1 .7
text : "Ensure that the --secure-port argument is not set to 0 (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--secure-port"
compare :
op : gt
value : 0
set : true
- flag : "--secure-port"
set : false
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and either remove the --secure-port parameter or
set it to a different (non-zero) desired port.
scored : true
- id : 1.1 .8
text : "Ensure that the --profiling argument is set to false (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--profiling"
compare :
op : eq
value : false
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the below parameter.
--profiling=false
scored : true
- id : 1.1 .9
text : "Ensure that the --repair-malformed-updates argument is set to false (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--repair-malformed-updates"
compare :
op : eq
value : false
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the below parameter.
--repair-malformed-updates=false
scored : true
- id : 1.1 .10
text : "Ensure that the admission control plugin AlwaysAdmit is not set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--enable-admission-plugins"
compare :
op : nothave
value : AlwaysAdmit
set : true
- flag : "--enable-admission-plugins"
set : false
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --enable-admission-plugins parameter to a
value that does not include AlwaysAdmit.
scored : true
- id : 1.1 .11
text : "Ensure that the admission control plugin AlwaysPullImages is set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "AlwaysPullImages"
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --enable-admission-plugins to
include AlwaysPullImages.
--enable-admission-plugins=...,AlwaysPullImages,...
scored : true
- id : 1.1 .12
text : "Ensure that the admission control plugin DenyEscalatingExec is set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "DenyEscalatingExec"
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --enable-admission-plugins parameter to a
value that includes DenyEscalatingExec.
--enable-admission-plugins=...,DenyEscalatingExec,...
scored : true
- id : 1.1 .13
text : "Ensure that the admission control plugin SecurityContextDeny is set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "SecurityContextDeny"
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --enable-admission-plugins parameter to
include SecurityContextDeny.
--enable-admission-plugins=...,SecurityContextDeny,...
scored : true
- id : 1.1 .14
text : "Ensure that the admission control plugin NamespaceLifecycle is set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--disable-admission-plugins"
compare :
op : nothave
value : "NamespaceLifecycle"
set : true
- flag : "--disable-admission-plugins"
set : false
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --disable-admission-plugins parameter to
ensure it does not include NamespaceLifecycle.
--disable-admission-plugins=...,NamespaceLifecycle,...
scored : true
- id : 1.1 .15
text : "Ensure that the --audit-log-path argument is set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--audit-log-path"
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master 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 : 1.1 .16
text : "Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--audit-log-maxage"
compare :
op : gte
value : 30
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --audit-log-maxage parameter to 30 or
as an appropriate number of days : --audit-log-maxage=30
scored : true
- id : 1.1 .17
text : "Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--audit-log-maxbackup"
compare :
op : gte
value : 10
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --audit-log-maxbackup parameter to 10
or to an appropriate value.
--audit-log-maxbackup=10
scored : true
- id : 1.1 .18
text : "Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--audit-log-maxsize"
compare :
op : gte
value : 100
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master 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 : 1.1 .19
text : "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--authorization-mode"
compare :
op : nothave
value : "AlwaysAllow"
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master 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 : 1.1 .20
text : "Ensure that the --token-auth-file parameter is not set (Scored)"
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 master node and remove the --token-auth-file=<filename>
parameter.
scored : true
- id : 1.1 .21
text : "Ensure that the --kubelet-certificate-authority argument is set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--kubelet-certificate-authority"
set : true
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 master 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 : 1.1 .22
text : "Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : and
test_items :
- flag : "--kubelet-client-certificate"
set : true
- flag : "--kubelet-client-key"
set : true
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 master 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 : 1.1 .23
text : "Ensure that the --service-account-lookup argument is set to true (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--service-account-lookup"
compare :
op : eq
value : true
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the below parameter.
--service-account-lookup=true
scored : true
- id : 1.1 .24
text : "Ensure that the admission control plugin PodSecurityPolicy is set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "PodSecurityPolicy"
set : true
remediation : |
Follow the documentation and create Pod Security Policy objects as per your environment.
Then, edit the API server pod specification file $apiserverconf
on the master node and set the --enable-admission-plugins parameter to a
value that includes PodSecurityPolicy :
--enable-admission-plugins=...,PodSecurityPolicy,...
Then restart the API Server.
scored : true
- id : 1.1 .25
text : "Ensure that the --service-account-key-file argument is set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--service-account-key-file"
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --service-account-key-file parameter
to the public key file for service accounts :
--service-account-key-file=<filename>
scored : true
- id : 1.1 .26
text : "Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as
appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
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 master 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 : 1.1 .27
text : "Ensure that the admission control plugin ServiceAccount is set(Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "ServiceAccount"
set : true
- flag : "--enable-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 master node and set the --enable-admission-plugins parameter to a
value that includes ServiceAccount.
--enable-admission-plugins=...,ServiceAccount,...
scored : true
- id : 1.1 .28
text : "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set
as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
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 master 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 : 1.1 .29
text : "Ensure that the --client-ca-file argument is set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--client-ca-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 master node and set the client certificate authority file.
--client-ca-file=<path/to/client-ca-file>
scored : true
- id : 1.1 .30
text : "Ensure that the API Server only makes use of Strong Cryptographic Ciphers (Not Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--tls-cipher-suites"
compare :
op : has
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"
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the below parameter.
--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
scored : false
- id : 1.1 .31
text : "Ensure that the --etcd-cafile argument is set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--etcd-cafile"
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 master node and set the etcd
certificate authority file parameter.
--etcd-cafile=<path/to/ca-file>
scored : true
- id : 1.1 .32
text : "Ensure that the --authorization-mode argument is set to Node (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--authorization-mode"
compare :
op : has
value : "Node"
set : true
remediation : |
Edit the API server pod specification file $apiserverconf
on the master node and set the --authorization-mode parameter to a
value that includes Node.
--authorization-mode=Node,RBAC
scored : true
- id : 1.1 .33
text : "Ensure that the admission control plugin NodeRestriction is set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "NodeRestriction"
set : true
remediation : |
Follow the Kubernetes documentation and configure NodeRestriction plug-in on
kubelets. Then, edit the API server pod specification file $apiserverconf
on the master node and set the --enable-admission-plugins parameter to a
value that includes NodeRestriction.
--enable-admission-plugins=...,NodeRestriction,...
scored : true
- id : 1.1 .34
text : "Ensure that the --experimental-encryption-provider-config argument is
set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--experimental-encryption-provider-config"
set : true
remediation : |
Follow the Kubernetes documentation and configure a EncryptionConfig file.
Then, edit the API server pod specification file $apiserverconf on the
master node and set the --experimental-encryption-provider-config parameter
to the path of that file :
--experimental-encryption-provider-config=</path/to/EncryptionConfig/File>
scored : true
- id : 1.1 .35
text : "Ensure that the encryption provider is set to aescbc (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
type : "manual"
remediation : |
[ Manual test]
Follow the Kubernetes documentation and configure a EncryptionConfig file. In this file,
choose aescbc as the encryption provider.
For example,
kind : EncryptionConfig
apiVersion : v1
resources :
- resources :
- secrets
providers :
- aescbc :
keys :
- name : key1
secret : <32-byte base64-encoded secret>
scored : true
- id : 1.1 .36
text : "Ensure that the admission control plugin EventRateLimit is set (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--enable-admission-plugins"
compare :
op : has
value : "EventRateLimit"
set : true
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 : true
- id : 1.1 .37a
text : "Ensure that the AdvancedAuditing argument is not set to false (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--feature-gates"
compare :
op : nothave
value : "AdvancedAuditing=false"
set : true
- flag : "--feature-gates"
set : false
remediation : |
Follow the Kubernetes documentation and set the desired audit policy in the
/etc/kubernetes/audit-policy.yaml file. Then, edit the API server pod specification file $apiserverconf
and set the below parameters.
--audit-policy-file=/etc/kubernetes/audit-policy.yaml
scored : true
- id : 1.1 .37b
text : "Ensure that the AdvancedAuditing argument is not set to false (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
2020-03-03 17:03:21 +00:00
bin_op : or
2020-01-06 09:18:25 +00:00
test_items :
- flag : "--audit-policy-file"
compare :
op : eq
value : "/etc/kubernetes/audit-policy.yaml"
set : true
2020-03-03 17:03:21 +00:00
- flag : "--audit-policy-file"
compare :
op : eq
value : "/etc/kubernetes/audit-policy.yml"
set : true
2020-01-06 09:18:25 +00:00
remediation : |
Follow the Kubernetes documentation and set the desired audit policy in the
/etc/kubernetes/audit-policy.yaml file. Then, edit the API server pod specification file $apiserverconf
and set the below parameters.
--audit-policy-file=/etc/kubernetes/audit-policy.yaml
scored : true
- id : 1.1 .38
text : "Ensure that the --request-timeout argument is set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--request-timeout"
set : false
- flag : "--request-timeout"
set : true
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 : 1.1 .39
text : "Ensure that the API Server only makes use of Strong Cryptographic Ciphers ( Not Scored)"
audit : "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests :
test_items :
- flag : "--tls-cipher-suites"
compare :
op : eq
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"
set : true
remediation : |
Edit the API server pod specification file /etc/kubernetes/manifests
kube-apiserver.yaml on the master node and set the below parameter.
--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
scored : false
- id : 1.2
text : "Scheduler"
checks :
- id : 1.2 .1
text : "Ensure that the --profiling argument is set to false (Scored)"
audit : "/bin/ps -ef | grep $schedulerbin | grep -v grep"
tests :
test_items :
- flag : "--profiling"
compare :
op : eq
value : false
set : true
remediation : |
Edit the Scheduler pod specification file $schedulerconf
file on the master node and set the below parameter.
--profiling=false
scored : true
- id : 1.2 .2
text : "Ensure that the --address argument is set to 127.0.0.1 (Scored)"
audit : "/bin/ps -ef | grep $schedulerbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--address"
compare :
op : eq
value : "127.0.0.1"
set : true
- flag : "--address"
set : false
remediation : |
Edit the Scheduler pod specification file $schedulerconf
file on the master node and ensure the correct value for the
--address parameter.
scored : true
- id : 1.3
text : "Controller Manager"
checks :
- id : 1.3 .1
text : "Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
test_items :
- flag : "--terminated-pod-gc-threshold"
set : true
remediation : |
Edit the Controller Manager pod specification file $controllermanagerconf
on the master node and set the --terminated-pod-gc-threshold to an appropriate threshold, for example :
--terminated-pod-gc-threshold=10
scored : true
- id : 1.3 .2
text : "Ensure that the --profiling argument is set to false (Scored)"
audit : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
test_items :
- flag : "--profiling"
compare :
op : eq
value : false
set : true
remediation : |
Edit the Controller Manager pod specification file $controllermanagerconf
on the master 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 (Scored)"
audit : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
test_items :
- flag : "--use-service-account-credentials"
compare :
op : noteq
value : false
set : true
remediation : |
Edit the Controller Manager pod specification file $controllermanagerconf
on the master 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 (Scored)"
audit : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
test_items :
- flag : "--service-account-private-key-file"
set : true
remediation : |
Edit the Controller Manager pod specification file $controllermanagerconf
on the master 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 (Scored)"
audit : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
test_items :
- flag : "--root-ca-file"
set : true
remediation : |
Edit the Controller Manager pod specification file $controllermanagerconf
on the master 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 (Scored)"
audit : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
test_items :
- flag : "--feature-gates"
compare :
op : eq
value : "RotateKubeletServerCertificate=true"
set : true
remediation : |
Edit the Controller Manager pod specification file $controllermanagerconf
controller-manager.yaml on the master 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 --address argument is set to 127.0.0.1 (Scored)"
audit : "/bin/ps -ef | grep $controllermanagerbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--address"
compare :
op : eq
value : "127.0.0.1"
set : true
- flag : "--address"
set : false
remediation : |
Edit the Controller Manager pod specification file $controllermanagerconf
controller-manager.yaml on the master node and ensure the correct value
for the --address parameter.
scored : true
- id : 1.4
text : "Configuration Files"
checks :
- id : 1.4 .1
text : "Ensure that the API server pod specification file permissions are
set to 644 or more restrictive (Scored)"
2020-03-16 12:25:46 +00:00
audit : "/bin/sh -c 'if test -e $apiserverconf; then stat -c permissions=%a $apiserverconf; fi'"
2020-01-06 09:18:25 +00:00
tests :
test_items :
2020-03-16 12:25:46 +00:00
- flag : "permissions"
2020-01-06 09:18:25 +00:00
compare :
2020-03-16 12:25:46 +00:00
op : bitmask
2020-01-06 09:18:25 +00:00
value : "644"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chmod 644 $apiserverconf
scored : true
- id : 1.4 .2
text : "Ensure that the API server pod specification file ownership is set to
root:root (Scored)"
audit : "/bin/sh -c 'if test -e $apiserverconf; then stat -c %U:%G $apiserverconf; fi'"
tests :
test_items :
- flag : "root:root"
compare :
op : eq
value : "root:root"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chown root:root $apiserverconf
scored : true
- id : 1.4 .3
text : "Ensure that the controller manager pod specification file
permissions are set to 644 or more restrictive (Scored)"
2020-03-16 12:25:46 +00:00
audit : "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c permissions=%a $controllermanagerconf; fi'"
2020-01-06 09:18:25 +00:00
tests :
test_items :
2020-03-16 12:25:46 +00:00
- flag : "permissions"
2020-01-06 09:18:25 +00:00
compare :
2020-03-16 12:25:46 +00:00
op : bitmask
2020-01-06 09:18:25 +00:00
value : "644"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chmod 644 $controllermanagerconf
scored : true
- id : 1.4 .4
text : "Ensure that the controller manager pod specification file
ownership is set to root:root (Scored)"
audit : "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c %U:%G $controllermanagerconf; fi'"
tests :
test_items :
- flag : "root:root"
compare :
op : eq
value : "root:root"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chown root:root $controllermanagerconf
scored : true
- id : 1.4 .5
text : "Ensure that the scheduler pod specification file permissions are set
to 644 or more restrictive (Scored)"
2020-03-16 12:25:46 +00:00
audit : "/bin/sh -c 'if test -e $schedulerconf; then stat -c permissions=%a $schedulerconf; fi'"
2020-01-06 09:18:25 +00:00
tests :
test_items :
2020-03-16 12:25:46 +00:00
- flag : "permissions"
2020-01-06 09:18:25 +00:00
compare :
2020-03-16 12:25:46 +00:00
op : bitmask
2020-01-06 09:18:25 +00:00
value : "644"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chmod 644 $schedulerconf
scored : true
- id : 1.4 .6
text : "Ensure that the scheduler pod specification file ownership is set to
root:root (Scored)"
audit : "/bin/sh -c 'if test -e $schedulerconf; then stat -c %U:%G $schedulerconf; fi'"
tests :
test_items :
- flag : "root:root"
compare :
op : eq
value : "root:root"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chown root:root $schedulerconf
scored : true
- id : 1.4 .7
text : "Ensure that the etcd pod specification file permissions are set to
644 or more restrictive (Scored)"
2020-03-16 12:25:46 +00:00
audit : "/bin/sh -c 'if test -e $etcdconf; then stat -c permissions=%a $etcdconf; fi'"
2020-01-06 09:18:25 +00:00
tests :
test_items :
2020-03-16 12:25:46 +00:00
- flag : "permissions"
2020-01-06 09:18:25 +00:00
compare :
2020-03-16 12:25:46 +00:00
op : bitmask
2020-01-06 09:18:25 +00:00
value : "644"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chmod 644 $etcdconf
scored : true
- id : 1.4 .8
text : "Ensure that the etcd pod specification file ownership is set to
root:root (Scored)"
audit : "/bin/sh -c 'if test -e $etcdconf; then stat -c %U:%G $etcdconf; fi'"
tests :
test_items :
- flag : "root:root"
compare :
op : eq
value : "root:root"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chown root:root $etcdconf
scored : true
- id : 1.4 .9
text : "Ensure that the Container Network Interface file permissions are
set to 644 or more restrictive (Not Scored)"
2020-03-16 12:25:46 +00:00
audit : "stat -c permissions=%a <path/to/cni/files>"
2020-01-06 09:18:25 +00:00
type : "manual"
remediation : |
[ Manual test]
Run the below command (based on the file location on your system) on the master node.
For example,
chmod 644 <path/to/cni/files>
scored : true
- id : 1.4 .10
text : "Ensure that the Container Network Interface file ownership is set
to root:root (Not Scored)"
audit : "stat -c %U:%G <path/to/cni/files>"
type : "manual"
remediation : |
[ Manual test]
Run the below command (based on the file location on your system) on the master node.
For example,
chown root:root <path/to/cni/files>
scored : true
- id : 1.4 .11
text : "Ensure that the etcd data directory permissions are set to 700 or more restrictive (Scored)"
2020-03-16 12:25:46 +00:00
audit : ps -ef | grep $etcdbin | grep -- --data-dir | sed 's%.*data-dir[= ]\([^ ]*\).*%\1%' | xargs stat -c permissions=%a
2020-01-06 09:18:25 +00:00
tests :
test_items :
2020-03-16 12:25:46 +00:00
- flag : "permissions"
2020-01-06 09:18:25 +00:00
compare :
2020-03-16 12:25:46 +00:00
op : bitmask
2020-01-06 09:18:25 +00:00
value : "700"
set : true
remediation : |
On the etcd server node, get the etcd data directory, passed as an argument --data-dir ,
from the below command :
ps -ef | grep $etcdbin
Run the below command (based on the etcd data directory found above). For example,
chmod 700 /var/lib/etcd
scored : true
- id : 1.4 .12
text : "Ensure that the etcd data directory ownership is set to etcd:etcd (Scored)"
audit : ps -ef | grep $etcdbin | grep -- --data-dir | sed 's%.*data-dir[= ]\([^ ]*\).*%\1%' | xargs stat -c %U:%G
tests :
test_items :
- flag : "etcd:etcd"
set : true
remediation : |
On the etcd server node, get the etcd data directory, passed as an argument --data-dir ,
from the below command :
ps -ef | grep $etcdbin
Run the below command (based on the etcd data directory found above). For example,
chown etcd:etcd /var/lib/etcd
scored : true
- id : 1.4 .13
text : "Ensure that the admin.conf file permissions are set to 644 or
more restrictive (Scored)"
2020-03-16 12:25:46 +00:00
audit : "/bin/sh -c 'if test -e /etc/kubernetes/admin.conf; then stat -c permissions=%a /etc/kubernetes/admin.conf; fi'"
2020-01-06 09:18:25 +00:00
tests :
test_items :
2020-03-16 12:25:46 +00:00
- flag : "permissions"
2020-01-06 09:18:25 +00:00
compare :
2020-03-16 12:25:46 +00:00
op : bitmask
2020-01-06 09:18:25 +00:00
value : "644"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chmod 644 /etc/kubernetes/admin.conf
scored : true
- id : 1.4 .14
text : "Ensure that the admin.conf file ownership is set to root:root (Scored)"
audit : "/bin/sh -c 'if test -e /etc/kubernetes/admin.conf; then stat -c %U:%G /etc/kubernetes/admin.conf; fi'"
tests :
test_items :
- flag : "root:root"
compare :
op : eq
value : "root:root"
set : true
remediation : |
Run the below command (based on the file location on your system) on the master node.
For example,
chown root:root /etc/kubernetes/admin.conf
scored : true
- id : 1.4 .15
text : "Ensure that the scheduler.conf file permissions are set to 644 or
more restrictive (Scored)"
2020-03-16 12:25:46 +00:00
audit : "/bin/sh -c 'if test -e /etc/kubernetes/scheduler.conf; then stat -c permissions=%a /etc/kubernetes/scheduler.conf; fi'"
2020-01-06 09:18:25 +00:00
tests :
test_items :
2020-03-16 12:25:46 +00:00
- flag : "permissions"
2020-01-06 09:18:25 +00:00
compare :
2020-03-16 12:25:46 +00:00
op : bitmask
2020-01-06 09:18:25 +00:00
value : "644"
set : true
remediation : |
Run the below command (based on the file location on your system) on the
master node. For example, chmod 644 /etc/kubernetes/scheduler.conf
scored : true
- id : 1.4 .16
text : "Ensure that the scheduler.conf file ownership is set to root:root (Scored)"
audit : "/bin/sh -c 'if test -e /etc/kubernetes/scheduler.conf; then stat -c %U:%G /etc/kubernetes/scheduler.conf; fi'"
tests :
test_items :
- flag : "root:root"
compare :
op : eq
value : "root:root"
set : true
remediation : |
Run the below command (based on the file location on your system) on the
master node. For example, chown root:root /etc/kubernetes/scheduler.conf
scored : true
- id : 1.4 .17
text : "Ensure that the controller-manager.conf file permissions are set
to 644 or more restrictive (Scored)"
2020-03-16 12:25:46 +00:00
audit : "/bin/sh -c 'if test -e /etc/kubernetes/controller-manager.conf; then stat -c permissions=%a /etc/kubernetes/controller-manager.conf; fi'"
2020-01-06 09:18:25 +00:00
tests :
test_items :
2020-03-16 12:25:46 +00:00
- flag : "permissions"
2020-01-06 09:18:25 +00:00
compare :
2020-03-16 12:25:46 +00:00
op : bitmask
2020-01-06 09:18:25 +00:00
value : "644"
set : true
remediation : |
Run the below command (based on the file location on your system) on the
master node. For example, chmod 644 /etc/kubernetes/controller-manager.conf
scored : true
- id : 1.4 .18
text : "Ensure that the controller-manager.conf file ownership is set to root:root (Scored)"
audit : "/bin/sh -c 'if test -e /etc/kubernetes/controller-manager.conf; then stat -c %U:%G /etc/kubernetes/controller-manager.conf; fi'"
tests :
test_items :
- flag : "root:root"
compare :
op : eq
value : "root:root"
set : true
remediation : |
Run the below command (based on the file location on your system) on the
master node. For example, chown root:root /etc/kubernetes/controller-manager.conf
scored : true
- id : 1.5
text : "etcd"
checks :
- id : 1.5 .1
text : "Ensure that the --cert-file and --key-file arguments are set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $etcdbin | grep -v grep"
tests :
test_items :
- flag : "--cert-file"
set : true
- flag : "--key-file"
set : true
remediation : |
Follow the etcd service documentation and configure TLS encryption.
Then, edit the etcd pod specification file $etcdconf on the
master node and set the below parameters.
--ca-file=</path/to/ca-file>
--key-file=</path/to/key-file>
scored : true
- id : 1.5 .2
text : "Ensure that the --client-cert-auth argument is set to true (Scored)"
audit : "/bin/ps -ef | grep $etcdbin | grep -v grep"
tests :
test_items :
- flag : "--client-cert-auth"
compare :
op : noteq
value : false
set : true
remediation : |
Edit the etcd pod specification file $etcdconf on the master
node and set the below parameter.
--client-cert-auth="true"
scored : true
- id : 1.5 .3
text : "Ensure that the --auto-tls argument is not set to true (Scored)"
audit : "/bin/ps -ef | grep $etcdbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--auto-tls"
set : false
- flag : "--auto-tls"
compare :
op : eq
value : false
remediation : |
Edit the etcd pod specification file $etcdconf on the master
node and either remove the --auto-tls parameter or set it to false.
--auto-tls=false
scored : true
- id : 1.5 .4
text : "Ensure that the --peer-cert-file and --peer-key-file arguments are
set as appropriate (Scored)"
audit : "/bin/ps -ef | grep $etcdbin | grep -v grep"
tests :
bin_op : and
test_items :
- flag : "--peer-cert-file"
set : true
- flag : "--peer-key-file"
set : true
remediation : |
Follow the etcd service documentation and configure peer TLS encryption as appropriate
for your etcd cluster. Then, edit the etcd pod specification file $etcdconf on the
master node and set the below parameters.
--peer-client-file=</path/to/peer-cert-file>
--peer-key-file=</path/to/peer-key-file>
scored : true
- id : 1.5 .5
text : "Ensure that the --peer-client-cert-auth argument is set to true (Scored)"
audit : "/bin/ps -ef | grep $etcdbin | grep -v grep"
tests :
test_items :
- flag : "--peer-client-cert-auth"
compare :
op : eq
value : true
set : true
remediation : |
Edit the etcd pod specification file $etcdconf on the master
node and set the below parameter.
--peer-client-cert-auth=true
scored : true
- id : 1.5 .6
text : "Ensure that the --peer-auto-tls argument is not set to true (Scored)"
audit : "/bin/ps -ef | grep $etcdbin | grep -v grep"
tests :
bin_op : or
test_items :
- flag : "--peer-auto-tls"
set : false
- flag : "--peer-auto-tls"
compare :
op : eq
value : false
set : true
remediation : |
Edit the etcd pod specification file $etcdconf on the master
node and either remove the --peer-auto-tls parameter or set it to false.
--peer-auto-tls=false
scored : true
- id : 1.5 .7
text : "Ensure that a unique Certificate Authority is used for etcd (Not Scored)"
audit : "/bin/ps -ef | grep $etcdbin | grep -v grep"
type : "manual"
tests :
test_items :
- flag : "--trusted-ca-file"
set : true
remediation : |
[ Manual test]
Follow the etcd documentation and create a dedicated certificate authority setup for the
etcd service.
Then, edit the etcd pod specification file $etcdconf on the
master node and set the below parameter.
--trusted-ca-file=</path/to/ca-file>
scored : false
- id : 1.6
text : "General Security Primitives"
checks :
- id : 1.6 .1
text : "Ensure that the cluster-admin role is only used where required (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Remove any unneeded clusterrolebindings :
kubectl delete clusterrolebinding [name]
scored : false
- id : 1.6 .2
text : "Create administrative boundaries between resources using namespaces (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Follow the documentation and create namespaces for objects in your deployment as you
need them.
scored : false
- id : 1.6 .3
text : "Create network segmentation using Network Policies (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Follow the documentation and create NetworkPolicy objects as you need them.
scored : false
- id : 1.6 .4
text : "Ensure that the seccomp profile is set to docker/default in your pod
definitions (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Seccomp is an alpha feature currently. By default, all alpha features are disabled. So, you
would need to enable alpha features in the apiserver by passing "--feature-
gates=AllAlpha=true" argument.
Edit the $apiserverconf file on the master node and set the KUBE_API_ARGS
parameter to "--feature-gates=AllAlpha=true"
KUBE_API_ARGS="--feature-gates=AllAlpha=true"
Based on your system, restart the kube-apiserver service. For example :
systemctl restart kube-apiserver.service
Use annotations to enable the docker/default seccomp profile in your pod definitions. An
example is as below :
apiVersion : v1
kind : Pod
metadata :
name : trustworthy-pod
annotations :
seccomp.security.alpha.kubernetes.io/pod : docker/default
spec :
containers :
- name : trustworthy-container
image : sotrustworthy:latest
scored : false
- id : 1.6 .5
text : "Apply Security Context to Your Pods and Containers (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Follow the Kubernetes documentation and apply security contexts to your pods. For a
suggested list of security contexts, you may refer to the CIS Security Benchmark for Docker
Containers.
scored : false
- id : 1.6 .6
text : "Configure Image Provenance using ImagePolicyWebhook admission controller (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Follow the Kubernetes documentation and setup image provenance.
scored : false
- id : 1.6 .7
text : "Configure Network policies as appropriate (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Follow the Kubernetes documentation and setup network policies as appropriate.
For example, you could create a "default" isolation policy for a Namespace by creating a
NetworkPolicy that selects all pods but does not allow any traffic :
apiVersion : networking.k8s.io/v1
kind : NetworkPolicy
metadata :
name : default-deny
spec :
podSelector :
scored : false
- id : 1.6 .8
text : "Place compensating controls in the form of PSP and RBAC for
privileged containers usage (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Follow Kubernetes documentation and setup PSP and RBAC authorization for your cluster.
scored : false
- id : 1.7
text : "PodSecurityPolicies"
checks :
- id : 1.7 .1
text : "Do not admit privileged containers (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.privileged field is omitted or set to false.
scored : false
- id : 1.7 .2
2020-01-07 12:31:07 +00:00
text : "Do not admit containers wishing to share the host process ID namespace (Scored)"
2020-01-06 09:18:25 +00:00
type : "manual"
remediation : |
[ Manual test]
Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.hostPID field is omitted or set to false.
scored : false
- id : 1.7 .3
2020-01-07 12:31:07 +00:00
text : "Do not admit containers wishing to share the host IPC namespace (Scored)"
2020-01-06 09:18:25 +00:00
type : "manual"
remediation : |
[ Manual test]
Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.hostIPC field is omitted or set to false.
scored : false
- id : 1.7 .4
2020-01-07 12:31:07 +00:00
text : "Do not admit containers wishing to share the host network namespace (Scored)"
2020-01-06 09:18:25 +00:00
type : "manual"
remediation : |
[ Manual test]
Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.hostNetwork field is omitted or set to false.
scored : false
- id : 1.7 .5
2020-01-07 12:31:07 +00:00
text : "Do not admit containers with allowPrivilegeEscalation (Scored)"
2020-01-06 09:18:25 +00:00
type : "manual"
remediation : |
[ Manual test]
Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.allowPrivilegeEscalation field is omitted or set to false.
scored : false
- id : 1.7 .6
text : "Do not admit root containers (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.runAsUser.rule is set to either MustRunAsNonRoot or MustRunAs with the range of UIDs not including 0.
scored : false
- id : 1.7 .7
text : "Do not admit containers with dangerous capabilities (Not Scored)"
type : "manual"
remediation : |
[ Manual test]
Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.requiredDropCapabilities is set to include either NET_RAW or ALL.
scored : false
