| name | cis-docker-v170-3.3 |
| description | Ensure that docker.socket file ownership is set to root:root |
| category | cis-docker |
| version | 1.7.0 |
| author | cyberstrike-official |
| tags | ["cis","docker","daemon","files","permissions","ownership","socket"] |
| cis_id | 3.3 |
| cis_benchmark | CIS Docker Benchmark v1.7.0 |
| tech_stack | ["docker"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
CIS Docker Benchmark v1.7.0 - Control 3.3
Description
You should verify that the docker.socket file ownership and group ownership are correctly set to root.
Rationale
The docker.socket file contains sensitive parameters that may alter the behavior of the Docker remote API. For this reason, it should be owned and group owned by root in order to ensure that it is not modified by less privileged users.
Impact
None.
Audit Procedure
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 command below, including the correct file path to verify that the file is owned and group-owned by root:
For example:
stat -c %U:%G /usr/lib/systemd/system/docker.socket | grep -v root:root
The command above should not return a value.
Remediation
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 command below, including the correct file path to set the ownership and group ownership for the file to root:
For example:
chown root:root /usr/lib/systemd/system/docker.socket
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 ownership and group ownership for it should be set to root.
References
- https://docs.docker.com/engine/reference/commandline/dockerd/#daemon-socket-option
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|
| v8 | 5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts
Restrict 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. |
