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V-274877

CAT II (Medium)

RHEL 8 must audit any script or executable called by cron as root or by any privileged user.

Rule ID

SV-274877r1155381_rule

STIG

Red Hat Enterprise Linux 8 Security Technical Implementation Guide

Version

V2R7

CCIs

CCI-000172

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 set to 755 or more restrictive, and have no extended rights that allow a nonprivileged user to modify the script or executable.

Check Content

Verify RHEL 8 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

Configure RHEL 8 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":
-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