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Add CIS Kubernetes CIS-1.10 for k8s v1.28 - v1.31 (#1753)
* Create cis-1.10 yamls and Update info - Modify yaml versions from 1.9 to 1.10 - Adapt configmap to cover cis-1.10 - Adapt docs and cmd files * Adapt master.yaml - 1.2.29 update cipher list to remove the following insecure ones (RC4-Based, 3DES-Based, RSA-Based AES CBC): TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, TLS_RSA_WITH_3DES_EDE_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_RC4_128_SHA, TLS_ECDHE_RSA_WITH_RC4_128_SHA ticket: https://workbench.cisecurity.org/community/43/tickets/21760 * Adapt policies.yaml - 5.1.11 typo in sub-resource name 'certificatesigningrequest' https://workbench.cisecurity.org/tickets/21352 - 5.2.2 new audit to verify if a container is privileged or not. https://workbench.cisecurity.org/tickets/20919 - 5.2.3 new audit to verify the presence of hostPID opt-in across all pods. https://workbench.cisecurity.org/tickets/20919 - 5.2.4 new audit to verify the presence of hostIPC opt-in across all pods. https://workbench.cisecurity.org/tickets/20923 - 5.2.5 new audit to verify the presence of hostNetwork opt-in across all pods. https://workbench.cisecurity.org/tickets/20921 - 5.2.6 new audit to verify the presence of 'allowPrivilegeEscalation' to true across all pods' container(s) - 5.2.6 the 'allowPrivilegeEscalation' setting is moved from 'spec' to 'securityContext' https://workbench.cisecurity.org/tickets/20922 - 5.2.9 new audit to verify the presence of added capabilities across all pods' container(s) * Fix 5.2.6 remediation
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--- | ||
## Version-specific settings that override the values in cfg/config.yaml |
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--- | ||
controls: | ||
version: "cis-1.10" | ||
id: 3 | ||
text: "Control Plane Configuration" | ||
type: "controlplane" | ||
groups: | ||
- id: 3.1 | ||
text: "Authentication and Authorization" | ||
checks: | ||
- id: 3.1.1 | ||
text: "Client certificate authentication should not be used for users (Manual)" | ||
type: "manual" | ||
remediation: | | ||
Alternative mechanisms provided by Kubernetes such as the use of OIDC should be | ||
implemented in place of client certificates. | ||
scored: false | ||
|
||
- id: 3.1.2 | ||
text: "Service account token authentication should not be used for users (Manual)" | ||
type: "manual" | ||
remediation: | | ||
Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented | ||
in place of service account tokens. | ||
scored: false | ||
|
||
- id: 3.1.3 | ||
text: "Bootstrap token authentication should not be used for users (Manual)" | ||
type: "manual" | ||
remediation: | | ||
Alternative mechanisms provided by Kubernetes such as the use of OIDC should be implemented | ||
in place of bootstrap tokens. | ||
scored: false | ||
|
||
- id: 3.2 | ||
text: "Logging" | ||
checks: | ||
- id: 3.2.1 | ||
text: "Ensure that a minimal audit policy is created (Manual)" | ||
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep" | ||
tests: | ||
test_items: | ||
- flag: "--audit-policy-file" | ||
set: true | ||
remediation: | | ||
Create an audit policy file for your cluster. | ||
scored: false | ||
|
||
- id: 3.2.2 | ||
text: "Ensure that the audit policy covers key security concerns (Manual)" | ||
type: "manual" | ||
remediation: | | ||
Review the audit policy provided for the cluster and ensure that it covers | ||
at least the following areas, | ||
- Access to Secrets managed by the cluster. Care should be taken to only | ||
log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in | ||
order to avoid risk of logging sensitive data. | ||
- Modification of Pod and Deployment objects. | ||
- Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`. | ||
For most requests, minimally logging at the Metadata level is recommended | ||
(the most basic level of logging). | ||
scored: false |
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--- | ||
controls: | ||
version: "cis-1.10" | ||
id: 2 | ||
text: "Etcd Node Configuration" | ||
type: "etcd" | ||
groups: | ||
- id: 2 | ||
text: "Etcd Node Configuration" | ||
checks: | ||
- id: 2.1 | ||
text: "Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated)" | ||
audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep" | ||
tests: | ||
bin_op: and | ||
test_items: | ||
- flag: "--cert-file" | ||
env: "ETCD_CERT_FILE" | ||
- flag: "--key-file" | ||
env: "ETCD_KEY_FILE" | ||
remediation: | | ||
Follow the etcd service documentation and configure TLS encryption. | ||
Then, edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml | ||
on the master node and set the below parameters. | ||
--cert-file=</path/to/ca-file> | ||
--key-file=</path/to/key-file> | ||
scored: true | ||
|
||
- id: 2.2 | ||
text: "Ensure that the --client-cert-auth argument is set to true (Automated)" | ||
audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep" | ||
tests: | ||
test_items: | ||
- flag: "--client-cert-auth" | ||
env: "ETCD_CLIENT_CERT_AUTH" | ||
compare: | ||
op: eq | ||
value: 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: 2.3 | ||
text: "Ensure that the --auto-tls argument is not set to true (Automated)" | ||
audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep" | ||
tests: | ||
bin_op: or | ||
test_items: | ||
- flag: "--auto-tls" | ||
env: "ETCD_AUTO_TLS" | ||
set: false | ||
- flag: "--auto-tls" | ||
env: "ETCD_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: 2.4 | ||
text: "Ensure that the --peer-cert-file and --peer-key-file arguments are | ||
set as appropriate (Automated)" | ||
audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep" | ||
tests: | ||
bin_op: and | ||
test_items: | ||
- flag: "--peer-cert-file" | ||
env: "ETCD_PEER_CERT_FILE" | ||
- flag: "--peer-key-file" | ||
env: "ETCD_PEER_KEY_FILE" | ||
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: 2.5 | ||
text: "Ensure that the --peer-client-cert-auth argument is set to true (Automated)" | ||
audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep" | ||
tests: | ||
test_items: | ||
- flag: "--peer-client-cert-auth" | ||
env: "ETCD_PEER_CLIENT_CERT_AUTH" | ||
compare: | ||
op: eq | ||
value: 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: 2.6 | ||
text: "Ensure that the --peer-auto-tls argument is not set to true (Automated)" | ||
audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep" | ||
tests: | ||
bin_op: or | ||
test_items: | ||
- flag: "--peer-auto-tls" | ||
env: "ETCD_PEER_AUTO_TLS" | ||
set: false | ||
- flag: "--peer-auto-tls" | ||
env: "ETCD_PEER_AUTO_TLS" | ||
compare: | ||
op: eq | ||
value: false | ||
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: 2.7 | ||
text: "Ensure that a unique Certificate Authority is used for etcd (Manual)" | ||
audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep" | ||
tests: | ||
test_items: | ||
- flag: "--trusted-ca-file" | ||
env: "ETCD_TRUSTED_CA_FILE" | ||
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 |
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