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Check: GEN003110

IRIX 6.5: GEN003110 (in versions v1 r1 through v1 r0.8)

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

Check the permissions of the crontab directories. # ls -ldD /var/spool/cron/crontabs/ If the directory has an extended ACL, this is a finding.

Fix Text

Remove the extended ACL from the directory. # chmod A- /var/spool/cron/crontabs/

Additional Identifiers

Rule ID:

Vulnerability ID: V-22387

Group Title:

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