Check: GEN003110 M6
MACOSX 10.6:
GEN003110 M6
(in version v1 r3)
Title
Cron and crontab directories must not have extended ACLs. (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. ACLs on cron and crontab directories may provide unauthorized access to these directories. Unauthorized modifications to these directories or their contents may result in the addition of unauthorized cron jobs or deny service to authorized cron jobs.
Check Content
Open a terminal session and enter the following commands to view the extended ACLs of the crontab directory. ls -ld /usr/sbin/cron ls -ld /usr/lib/cron ls -ld /usr/bin/crontab ls -ld /private/var/at/cron.deny If the permissions include a '+', the directory has an extended ACL, this is a finding.
Fix Text
Open a terminal session and enter the following command to remove the extended ACLs. chmod -N <crontab directory>
Additional Identifiers
Rule ID: SV-38112r1_rule
Vulnerability ID: V-22387
Group Title:
Expert Comments
CCIs
| 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
| Number | Title |
|---|---|
| AC-6 |
Least Privilege |