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Check: GEN003140

SUSE Linux Enterprise Server v11 for System z STIG: GEN003140 (in versions v1 r12 through v1 r9)

Title

Cron and crontab directories must be group-owned by root, sys, bin or cron. (Cat II impact)

Discussion

To protect the integrity of scheduled system jobs and to prevent malicious modification to these jobs, crontab files must be secured. Failure to give group-ownership of cron or crontab directories to a system group provides the designated group and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.

Check Content

Check the group owner of cron and crontab directories. Procedure: # ls -ld /var/spool/cron /var/spool/cron/tabs ls -ld /etc/crontab /etc/cron.{d,daily,hourly,monthly,weekly} or # ls -ld /etc/cron*|grep -v deny If a directory is not group-owned by root, sys, bin, or cron, this is a finding.

Fix Text

Change the group owner of cron and crontab directories. # chgrp root <crontab directory>

Additional Identifiers

Rule ID: SV-45609r1_rule

Vulnerability ID: V-981

Group Title: GEN003140

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-000225	The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-6	Least Privilege