Control: 5.24 Ensure that docker exec commands are not used with the user=root option

Description

You should not use docker exec with the --user=root option.

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.

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.

Usage

Run the control in your terminal:

powerpipe control run docker_compliance.control.cis_v160_5_24

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe control run docker_compliance.control.cis_v160_5_24 --share

SQL

This control uses a named query:

with os_output as (
  select
    btrim(stdout_output, E' \n\r\t') as os,
    _ctx ->> 'connection_name' as os_conn
  from
    exec_command
  where
    command = 'uname -s'
), hostname as (
  select
    btrim(stdout_output, E' \n\r\t') as host,
    _ctx ->> 'connection_name' as host_conn,
    _ctx
  from
    exec_command
  where
    command = 'hostname'
),

linux_output as (
  select
    stdout_output,
    _ctx ->> 'connection_name' as conn
  from
    exec_command,
    os_output
  where
    os_conn = _ctx ->> 'connection_name'
    and command = 'sudo -n ausearch -k docker | grep exec | grep user'
)
select
  host as resource,
  case
    when os.os ilike '%Darwin%' then 'skip'
    when o.stdout_output = '' then 'ok'
    else 'alarm'
  end as status,
  case
    when os.os ilike '%Darwin%' then host || ' ausearch command not supported on ' || os.os || ' OS.'
    when o.stdout_output = '' then host || ' Docker exec commands are not used with the user=root option.'
    else host || ' Docker exec commands are used with the user=root option.'
  end as reason
  , h._ctx ->> 'connection_name' as connection_name
from
  hostname as h,
  os_output as os,
  linux_output as o
where
  os.os_conn = h.host_conn
  and h.host_conn = o.conn;

Control: 5.24 Ensure that docker exec commands are not used with the user=root option

Description

Remediation

Default Value

Usage

SQL

Tags