Ensure filesystem integrity is regularly checked

MediumLevel 1Automatedfreebsd

Description

Periodic checking of the filesystem integrity is needed to detect changes to the filesystem. Periodic file checking allows the system administrator to determine on a regular basis if critical files have been changed in an unauthorized fashion. Audit: automated read-only check derived from the CIS audit procedure; it prints "compliant" when the control is met.

How it is checked

Audit method: Shell command

shell

{ crontab -l -u root 2>/dev/null; cat /etc/crontab /etc/cron.d/* 2>/dev/null; } | grep -v "^[[:space:]]*#" | grep -Eq "aide[[:space:]].*--(check|update)" && echo compliant || echo "no aide --check cron job"

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Run the following command: # crontab -u root -e Add the following line to the crontab: @daily /usr/bin/lockf -s -t 0 /var/run/aide.lock /usr/local/bin/aide --check

Properties

Operating systems: Any
Tags: freebsdpermissions
Reference: CIS FreeBSD 14 Benchmark v1.0.1 - 5.3.2 Ensure filesystem integrity is regularly checked

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target freebsd