cyberstrikeus CIS Kubernetes Benchmark v1.11.1 - Control 1.1.11
Profile Applicability
- Level: 1 - Master Node
Description
Ensure that the etcd data directory has permissions of 700 or more restrictive.
Rationale
etcd is a highly-available key-value store used by Kubernetes deployments for persistent storage of all of its REST API objects. This data directory should be protected from any unauthorized reads or writes. It should not be readable or writable by any group members or the world.
Impact
None
Audit
On the etcd server node, get the etcd data directory, passed as an argument --data-dir, from the below command:
ps -ef | grep etcd
Run the below command (based on the etcd data directory found above). For example,
stat -c %a /var/lib/etcd
Verify that the permissions are 700 or more restrictive.
Remediation
On the etcd server node, get the etcd data directory, passed as an argument --data-dir, from the below command:
ps -ef | grep etcd
Run the below command (based on the etcd data directory found above). For example,
chmod 700 /var/lib/etcd
Default Value
By default, etcd data directory has permissions of 755.
References
- https://coreos.com/etcd/docs/latest/op-guide/configuration.html#data-dir
- https://kubernetes.io/docs/admin/etcd/
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.3 Configure Data Access Control ListsConfigure data access control lists based on a user's need to know. Apply data access control lists, also known as access permissions, to local and remote file systems, databases, and applications. | ● | ● | ● |
| v7 | 14.6 Protect Information through Access Control ListsProtect all information stored on systems with file system, network share, claims, application, or database specific access control lists. These controls will enforce the principle that only authorized individuals should have access to the information based on their need to access the information as a part of their responsibilities. | ● | ● | ● |