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UBTU-22-654041 Ubuntu 22.04 LTS must audit any script or executable called by cron as root or by any privileged user.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to AU-12 via CCI-000172

Title

Ubuntu 22.04 LTS must audit any script or executable called by cron as root or by any privileged user.

Control

Verify 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.

Discussion

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.

Related controls

CCI-000172

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/stig.rules": -w /etc/cron.d/ -p wa -k cronjobs -w /var/spool/cron/ -p wa -k cronjobs To load the rules to the kernel immediately, use the following command: $ sudo augenrules --load