3.4 Verify that docker.socket file permissions are set to 644 or more restrictive

Information

Verify that the 'docker.socket' file permissions are correctly set to '644'or more restrictive.

Rationale:

'docker.socket' file contains sensitive parameters that may alter the behavior of Docker remote API. Hence, it should be writable only by 'root' to maintain the integrity of the file.

Solution

Step 1: Find out the file location:

systemctl show -p FragmentPath docker.socket



Step 2: If the file does not exist, this recommendation is not applicable. If the file exists, execute the below command with the correct file path to set thefile permissions to '644'.

For example,

chmod 644 /usr/lib/systemd/system/docker.socket

Impact:

None.

Default Value:

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 file permissions for this file are correctly set to '644'.

See Also

https://workbench.cisecurity.org/files/1476

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b.

Plugin: Unix

Control ID: 341d3c5a6b64962e8b99ed5e008b13938e0f58598a62636c0ec26d943024b696