cyberstrikeus 7.7 Ensure that node certificates are rotated as appropriate (Manual)
Profile Applicability
- Level 1 - Docker Swarm
Description
You should rotate swarm node certificates in line with your organizational security policy.
Rationale
Docker Swarm uses TLS for clustering operations between its nodes. Certificate rotation ensures that in an event such as a compromised node or key, it is difficult to impersonate a node. By default, node certificates are rotated every 90 days, but you should rotate them more often or as appropriate in your environment.
Impact
None
Audit Procedure
Run one of the commands below and ensure that the node certificate Expiry Duration is set as appropriate.
docker info | grep "Expiry Duration"
docker info --format 'NodeCertExpiry: {{ .Swarm.Cluster.Spec.CAConfig.NodeCertExpiry }}'
Remediation
You should run the command to set the desired expiry time on the node certificate. For example:
docker swarm update --cert-expiry 48h
Default Value
By default, node certificates are rotated automatically every 90 days.
References
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 5.2 Use Unique PasswordsUse unique passwords for all enterprise assets. Best practice implementation includes, at a minimum, an 8-character password for accounts using MFA and a 14-character password for accounts not using MFA. | ● | ● | ● |
| v7 | 4.4 Use Unique PasswordsWhere multi-factor authentication is not supported (such as local administrator, root, or service accounts), accounts will use passwords that are unique to that system. | ● | ● |