Cis Docker 3.23
DevOps & Securitycis-docker-3.23Cis Docker 3.23 is an Agent Skill for devops & security published in the CyberStrikeus/CyberStrike repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.
Ensure that the Containerd socket file ownership is set to root:root
How to use this skill
Bring this guide into your coding agent with a prompt tailored to the tool you use.
- Open your project in Codex.
- Copy and paste the prompt below.
- Review files and risks before approving any action.
Inspect the Agent Skill at https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Server_Software/Docker/CIS_Docker_Benchmark_v1.8.0/cis-docker-3.23/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/cis-docker-3-23, but wait for my approval before writing files or running scripts.
Copying this prompt does not install or run the skill. Review third-party files before use.
Ensure that the Containerd socket file ownership is set to root:root (Automated)
Profile Applicability
- Level 1 - Docker - Linux
Description
You should verify that the Containerd socket file is owned by root and group owned by root.
Rationale
Containerd is an underlying component used by Docker to create and manage containers. It provides a socket file similar to the Docker socket, which must be protected from unauthorized access. If any other user or process owns this socket, it might be possible for that non-privileged user or process to interact with the Containerd daemon. Additionally, in this case a non-privileged user or process might be able to interact with containers which is neither a secure nor desired behavior.
Unlike the Docker socket, there is usually no requirement for non-privileged users to connect to the socket, so the ownership should be root:root.
Impact
None.
Audit Procedure
You should execute the below command to verify that the Containerd socket file is owned by root and group owned by root:
stat -c %U:%G /run/containerd/containerd.sock | grep -v root:root
The command above should return no results.
Remediation
You should execute the following command:
chown root:root /run/containerd/containerd.sock
This sets the ownership to root and group ownership to root for the default Containerd socket file.
Default Value
By default, the ownership and group ownership for the Containerd socket file is correctly set to root:root.
References
None specified in benchmark.
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. | ● | ● | ● |
| v7 | 4 Controlled Use of Administrative Privileges - Controlled Use of Administrative Privileges |