Navigate

Check: GEN003090

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN003090 (in versions v1 r14 through v1 r10)

Title

Crontab files 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 crontab files may provide unauthorized access to the files.

Check Content

Check the permissions of the crontab files. Get a listing of crontab files. # ls /var/spool/cron/crontabs Check all of the crontabs listed for an extended ACL. # aclget <directory>/<file> Check if extended permissions are disabled. If extended permissions are not disabled, this is a finding.

Fix Text

Remove the extended ACL from the crontab file(s) and disable extended permissions. #acledit <directory>/<file>

Additional Identifiers

Rule ID: SV-38782r1_rule

Vulnerability ID: V-22386

Group Title: GEN003090

Expert Comments

Expert comments are only available to logged-in users.

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