| name | cis-docker-3.12 |
| description | Ensure that the Docker server certificate file permissions are set to 444 or more restrictively |
| category | cis-docker |
| version | 1.8.0 |
| author | cyberstrike-official |
| tags | ["cis","docker","linux","containers","daemon-files","file-permissions","ownership"] |
| cis_id | 3.12 |
| cis_benchmark | CIS Docker Benchmark v1.8.0 |
| tech_stack | ["linux","docker"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Ensure that the Docker server certificate file permissions are set to 444 or more restrictively (Manual)
Profile Applicability
Description
You should verify that the Docker server certificate file (the file that is passed along with the --tlscert parameter) has permissions of 444 or more restrictive permissions.
Rationale
The Docker server certificate file should be protected from any tampering. It is used to authenticate the Docker server based on the given server certificate. It should therefore have permissions of 444 to prevent its modification.
Impact
None.
Audit Procedure
You should execute the command below to verify that the Docker server certificate file has permissions of 444 or more restrictive permissions:
stat -c %a <path to Docker server certificate file>
Remediation
You should execute the command below:
chmod 444 <path to Docker server certificate file>
This sets the file permissions of the Docker server certificate file to 444.
Default Value
By default, the permissions for the Docker server certificate file might not be 444. The default file permissions are governed by the operating system or user specific umask values.
References
- https://docs.docker.com/registry/insecure/
- https://docs.docker.com/engine/security/https/
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|
| v8 | 3.3 Configure Data Access Control Lists - Configure 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 Lists - Protect 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. |
