cyberstrikeus 5.24 Ensure that docker exec commands are not used with the user=root option (Manual)
Profile Applicability
- Level 2 - Docker - Linux
Description
You should not use docker exec with the --user=root option.
Rationale
Using the --user=root option in a docker exec command, executes it within the container as the root user. This could potentially be insecure, particularly when you are running containers with reduced capabilities or enhanced restrictions.
For example, if your container is running as a tomcat user (or any other non-root user), it would be possible to run a command through docker exec as root with the --user=root option. This could potentially be dangerous.
Impact
None.
Audit Procedure
If you have auditing enabled as recommended in Section 1, you can use the command below to filter out docker exec commands that use the --user=root option.
ausearch -k docker | grep exec | grep user
Remediation
You should not use the --user=root option in docker exec commands.
Default Value
By default, the docker exec command runs without the --user option.
References
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 5.4 Restrict Administrator Privileges to Dedicated Administrator AccountsRestrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user's primary, non-privileged account. | ● | ● | ● |
| v7 | 4 Controlled Use of Administrative PrivilegesControlled Use of Administrative Privileges |