Docker Enterprise docker.socket file ownership must be set to root:root.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-95743	DKER-EE-005190	SV-104881r1_rule		High

Description
Verify that the docker.socket file ownership and group ownership is correctly set to root. docker.socket file contains sensitive parameters that may alter the behavior of Docker remote API. Hence, it should be owned and group-owned by root to maintain the integrity of the file. This file may not be present on the system. In that case, this recommendation is not applicable. By default, if the file is present, the ownership and group-ownership for this file is correctly set to root.

Description

Verify that the docker.socket file ownership and group ownership is correctly set to root. docker.socket file contains sensitive parameters that may alter the behavior of Docker remote API. Hence, it should be owned and group-owned by root to maintain the integrity of the file. This file may not be present on the system. In that case, this recommendation is not applicable. By default, if the file is present, the ownership and group-ownership for this file is correctly set to root.

STIG	Date
Docker Enterprise 2.x Linux/UNIX Security Technical Implementation Guide	2019-09-13

Details

Check Text ( C-94573r1_chk )
Ensure that docker.socket file ownership is set to root:root. Step 1: Find out the file location: systemctl show -p FragmentPath docker.socket Step 2: If the file does not exist, this is not a finding. If the file exists, execute the below command with the correct file path to verify that the file is owned and group-owned by root. Example: stat -c %U:%G /usr/lib/systemd/system/docker.socket \| grep -v root:root If the above command returns nothing, this is not a finding. If the command returns non root:root file permissions, this is a finding.

Check Text ( C-94573r1_chk )

Ensure that docker.socket file ownership is set to root:root.

Step 1: Find out the file location:

systemctl show -p FragmentPath docker.socket

Step 2: If the file does not exist, this is not a finding. If the file exists, execute the below command with the correct file path to verify that the file is owned and group-owned by root.

Example:
stat -c %U:%G /usr/lib/systemd/system/docker.socket | grep -v root:root

If the above command returns nothing, this is not a finding. If the command returns non root:root file permissions, this is a finding.

Fix Text (F-101411r1_fix)
Step 1: Find out the file location: systemctl show -p FragmentPath docker.socket Step 2: If the file exists, execute the below command with the correct file path to set the ownership and group ownership for the file to root. Example: chown root:root /usr/lib/systemd/system/docker.socket