Ubuntu 22.04 LTS must audit any script or executable called by cron as root or by any privileged user.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-274862 | UBTU-22-654041 | SV-274862r1107273_rule | CCI-000172 | medium |
| Description | ||||
| Any script or executable called by cron as root or by any privileged user must be owned by that user, must have the permissions 755 or more restrictive, and should have no extended rights that allow any nonprivileged user to modify the script or executable. | ||||
| STIG | Date | |||
| Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide | 2025-05-16 | |||
Details
Check Text (C-274862r1107273_chk)
Verify that Ubuntu 22.04 LTS is configured to audit the execution of any system call made by cron as root or as any privileged user.
$ sudo auditctl -l | grep /etc/cron.d
-w /etc/cron.d -p wa -k cronjobs
$ sudo auditctl -l | grep /var/spool/cron
-w /var/spool/cron -p wa -k cronjobs
If either of these commands do not return the expected output, or the lines are commented out, this is a finding.
Fix Text (F-78868r1101706_fix)
Configure Ubuntu 22.04 LTS to audit the execution of any system call made by cron as root or as any privileged user.
Add or update the following file system rules to "/etc/audit/rules.d/audit.rules":
auditctl -w /etc/cron.d/ -p wa -k cronjobs
auditctl -w /var/spool/cron/ -p wa -k cronjobs
To load the rules to the kernel immediately, use the following command:
$ sudo augenrules --load