1.1.9 Ensure auditing is configured for Docker files and directories - docker.sock (Automated)
Profile Applicability:
Level 2 - Docker - Linux
Description:
Audit docker.sock, if applicable.
Rationale:
As well as auditing the normal Linux file system and system calls, you should also audit the Docker daemon. Because this daemon runs with root privileges, it is very important to audit its activities and usage. Its behavior depends on some key files and directories with docker.socket being one such file, and as this holds various parameters for the Docker daemon, it should be audited.
Impact:
Auditing can generate large log files. You should ensure that these are rotated and archived periodically. A separate partition should also be created for audit logs to avoid filling up any other critical partition.
Audit:
Step 1: Find out the configuration file location:
systemctl show -p FragmentPath docker.sock
Step 2: Locate the socket file location:
grep ListenStream <FragmentPath from previous step>
Step 3: If the file does not exist, this recommendation is not applicable. If the file exists, you should verify that there is an audit rule corresponding to the file:
For example, you could execute the command below:
auditctl -l | grep docker.sock
This should display a rule for docker.sock.
Remediation:
If the file exists, you should add a rule for it.
For example:
Add the line below to the /etc/audit/rules.d/audit.rules file:
-w /var/run/docker.sock -k docker
Then restart the audit daemon.
For example:
systemctl restart auditd
Default Value:
By default, Docker related files and directories are not audited. The file docker.sock may not be present, but if it is, it should be audited.
