cyberstrikeus CIS Docker Benchmark v1.7.0 - Control 3.8
Description
You should verify that all the registry certificate files (usually found under /etc/docker/certs.d/<registry-name> directory) have permissions of 444 or are set more restrictively.
Note that, by default, this directory might not exist if no registry certificate files are in place.
Rationale
The /etc/docker/certs.d/<registry-name> directory contains Docker registry certificates. These certificate files must have permissions of 444 or more restrictive permissions in order to ensure that unprivileged users do not have full access to them.
Impact
None.
Audit Procedure
You should execute the command below to verify that registry certificate files have permissions of 444 or are more restrictively set.
find /etc/docker/certs.d/ -type f -exec stat -c "%a %n" {} \;
Remediation
You should execute the following command:
find /etc/docker/certs.d/ -type f -exec chmod 0444 {} \;
This would set the permissions for the registry certificate files to 444.
Default Value
By default, the permissions for registry certificate files might not be 444. The default file permissions are governed by the system or user specific umask values which are defined within the operating system itself.
References
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. | ● | ● | ● |
Profile Applicability
- Level 1 - Docker - Linux
Assessment Status
Manual