Unauthorized use of the at or cron capabilities must not be permitted.

From Solaris 11 X86 Security Technical Implementation Guide

Associated with: CCI-000366

SV-60997r3_rule Unauthorized use of the at or cron capabilities must not be permitted.

Vulnerability discussion

On many systems, only the system administrator needs the ability to schedule jobs.Even though a given user is not listed in the "cron.allow" file, cron jobs can still be run as that user. The "cron.allow" file only controls administrative access to the "crontab" command for scheduling and modifying cron jobs. Much more effective access controls for the cron system can be obtained by using Role-Based Access Controls (RBAC).

Check content

Check that "at" and "cron" users are configured correctly. # ls /etc/cron.d/cron.deny If cron.deny exists, this is a finding. # ls /etc/cron.d/at.deny If at.deny exists, this is a finding. # cat /etc/cron.d/cron.allow cron.allow should have a single entry for "root". If any accounts other than root that are listed and they are not properly documented with the IA staff, this is a finding. # wc -l /etc/cron.d/at.allow | awk '{ print $1 }' If the output is non-zero, this is a finding.

Fix text

The root role is required. Modify the cron configuration files. # mv /etc/cron.d/cron.deny /etc/cron.d/cron.deny.temp # mv /etc/cron.d/at.deny /etc/cron.d/at.deny.temp # echo root > /etc/cron.d/cron.allow # cp /dev/null /etc/cron.d/at.allow # chown root:root /etc/cron.d/cron.allow /etc/cron.d/at.allow # chmod 400 /etc/cron.d/cron.allow /etc/cron.d/at.allow

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